Official Organ of the Florida Entomological Society
VOL. XVIII MARCH, 1935 No. 4
A NEW MYZUS FROM FLORIDA*
A. N. TISSOT
From loquat, apple, and hawthorn has been taken a brown
aphid belonging to the genus Myzus. As this insect is apparent-
ly new to science, the opportunity is taken in this paper to de-
scribe the known forms of the species.
Explanation of Plate III
Myzus eriobotryae n. sp.
Figs. 1-5.-Alate viviparous female: 1, head; 2, antenna; 3, cornicle;
4, cauda; 5, anal plate.
Figs. 6-7.-Alate male: 6, antenna; 7, cornicle.
MYZUS ERIOBOTRYAE new species
ALATE VIVIPAROUS FEMALE. (Plate III, figs. 1-5). Prevailing color of
body and appendages, brown. Length, 2.08 mm. Head dark brown. Width
nearly twice as great as the length. Antennal tubercles short, but rather
strongly converging. Front of head and antennal tubercles with a few
short, thick, hyaline, spines. Width through the compound eyes, .476 mm.
Eyes reddish-brown, large, with very prominent ocular tubercles. Ocelli
Contribution from Department of Entomology, Florida Agricultural
Experiment Station. Published March 8, 1935.
50 THE FLORIDA ENTOMOLOGIST
large, bordered with very dark brown. Antennae six-segmented, somewhat
longer than the body, very tuberculate. First two segments concolorous
with the head, remaining segments very dark brown, almost black. First
segment strongly gibbous on the inner margin, much wider than the second.
Surface of the first three segments without imbrications, fourth and fifth
faintly imbricated and the sixth distinctly imbricated. The third, fourth,
and fifth segments with scattered, tuberculate sensoria, oval or circular
in outline and varying considerably in size. The third segment with 50-65
sensoria, the fourth with 20-30 sensoria, and the fifth with 10-20 sensoria,
the sixth with a group of one large and five or six small sensoria at the
base of the unguis. Length of the antennal segments as follows: I, .095
mm., II, .075 mm., III, .775 mm., IV, .503 mm., V, .422 mm., VI, base, .150
mm., unguis, .626 mm. Rostrum brown, black-tipped, reaching to second
Prothorax reddish-brown, the other two thoracic segments yellowish-
brown with the dorsal lobes dark brown. The wing insertions yellowish.
Anterior margin of prothorax about equal in width with the head, posterior
somewhat wider. Lateral margins without tubercles. Wings hyaline,
stigma and veins brown, the anal and basal portion of the cubitus narrowly
bordered with brown shading. Fore wing with radial sector long and
rather sharply curved. The media twice-branched, the distance between
the second fork and the margin of the wing about equal to the distance
between the first and second forks. Hind wing with two oblique veins.
Legs brown, the bases of the femora and the mid-portions of the tibiae
light; the apical portion of the femora, the two extremities of the tibiae,
and the tarsi, dark brown.
Abdomen a dull dark brown, the embryos within showing through the
body wall as light areas. Cornicles yellowish-brown, the apical portion
somewhat darker than the remainder. The basal half narrow, the apical
half distinctly swollen, somewhat narrowed before the apex which is flared.
The surface faintly imbricated, the narrowed portion having a somewhat
wrinkled appearance. Length, .394 mm. Cauda and anal plate concolorous
with the abdomen. Cauda broad at the base, tapering toward the apex,
with a very slight constriction above the middle. Each side with two or
three slightly curved, hyaline hairs. Length, .163 mm. Anal plate large,
the sides nearly straight and the posterior margin rounded, with several
curved hyaline hairs. The surface of the cauda and anal plate covered
with short, thick, spine-like processes.
ALATE MALE. (Plate III, figs. 6-7). General color of body and append-
ages brown. Smaller and more slender than the alate female. Length,
2.00 mm. Head dark brown, anterior margin nearly black. Antennal
tubercles short, sharply converging. Width of head through the compound
eyes, .490 mm. Eyes reddish-brown, very large, occupying the whole sides
of the head, ocular tubercles large. Ocelli prominent, bordered with very
dark brown. Antennae six-segmented, about equal in length with the body.
The first segment concolorous with the head, the remaining segments very
dark brown or black. The first segment somewhat gibbous on the inner
margin, the surface faintly imbricated. The second segment with very
definite curved imbrications. The third and fourth segments faintly im-
bricated, the fifth and sixth definitely so. The sensoria are scattered over
most of the third, fourth, and fifth segments as in the alate female, but they
VOL. XVIII-No. 4
are smaller and somewhat less tuberculate than in that form. Third seg-
ment with 50-60 sensoria, fourth with 25-30, and the fifth with 10-15
sensoria. Sixth segment with one large and six small sensoria at the base
of the unguis. Length of antennal segments as follows: I, .082 mm., II,
.068 mm., III, .530 mm., IV, .394 mm., V, .326 mm., VI, base, .122 mm.,
unguis, .612 mm. Rostrum brown, with apex black, reaching to third coxae.
Thorax reddish-brown, with the dorsal lobes dark brown. Prothorax
but little wider than the head, the sides nearly parallel. Wings hyaline, the
stigma and veins dark brown. Fore wing with the radial sector sharply
curved at the base, the media twice-branched, the distance between the
second fork and the margin of the wing about equal to the distance between
the first and second forks. Hind wing with two oblique veins. Legs brown;
the apical two-thirds of the femora, both extremities of the tibiae, and the
tarsi, dark brown. The inner posterior margin of the femora sharply
Abdomen brown, somewhat lighter than in the female. Cornicles light
brown from base to apex. Shorter and thicker than in the alate female.
Somewhat swollen above the middle and constricted before the apex which
is flared. Length, .272 mm. Cauda and anal plate brown, considerably
darker than the abdomen. Cauda shorter, thicker, and more conical than
in the female. Anal plate broadly rounded. Both these structures with
curved hyaline hairs, and their surface covered with spine-like processes
as in the alate female.
TYPE LOCALITY: Gainesville, Florida.
TYPES: Holotype, alate vivaparous female taken from Erio-
botrya japonica, Loquat, Dec. 4, 1928 (F 428-28). Allotype,
male, same data as the holotype. The above types deposited in
the U. S. National Museum Collection, Cat. No. 44301. Para-
types in the collection of the Entomology Department, Florida
Agricultural Experiment Station and in that of the author.
Types selected from a series of forty-one alate females and two
males. Type material collected by the author.
NOTES: This aphid has been found on apple and hawthorn in
addition to loquat. A single specimen was taken from within
the funnel of a pitcher plant in western Florida. The majority
of the specimens were taken from loquat, all being alate females
except for two males. On apple there were taken a few imma-
ture oviparous females in addition to the alate viviparous fe-
males. All specimens from hawthorn were alate females. This
species may be distinguished from other species of this genus
found in Florida by the numerous, somewhat tuberculate anten-
A study of ten alate females gave the following range in size:
length, 2.08-2.40 mm., width of head across the eyes, .476-.517
mm., length of antennal segments, III, .626-.775 mm., IV, .408-
THE FLORIDA ENTOMOLOGIST
.571 mm., V, 3.354-.422 mm., VI, base, .122-.150 mm., unguis,
.490-.626 mm., length of cornicle, .340-.422 mm.
RECORDS: Eriobotrya japonica, Loquat, Gainesville, Dec. 4,
1928 (F 428-28), Dec. 27, 1928 (F 443-28), Dec. 30, 1931 (F 842-
31) ; Pyrus malus, Apple, Gainesville, Dec. 7, 1928 (F 430-28) ;
Crataegus uniflora, Gainesville, Feb. 19, 1929 (F 475-29) ; with-
in funnel of Sarracenia flava, Marianna, Apr. 13, 1930 (F 753-
30), (L. W. Ziegler coll.).
WALNUT CATERPILLARS EATEN BY BLUEJAYS?
On a recent evening (Aug. 25, 1934), before dark, the writer
observed a bluejay busily rubbing and belaboring something
that he held in his beak against the horizontal top board of a
lattice fence. It was surmised that he had a caterpillar from
which he was endeavoring to remove the sparse whitish hair,
preparatory to eating. The bird shortly swallowed the cater-
pillar. I further surmised that it was a specimen of the Walnut
caterpillar (Datana integerrima) as several colonies of these
were present in the few pecan trees growing in our yard.
The next morning I again observed a bluejay alighting on
the same fence, this time undoubtedly with one of the cater-
pillars in question as it was plainly visible from the window.
However, the bird flew away thus putting an end to this particu-
lar observation. Nevertheless, I had seen enough to satisfy me
that these bluejays were consuming some of the caterpillars in
question. But additional observations verified this.
Early in the evening of the same day, before dusk, I again
noted a bluejay, this time belaboring a caterpillar on a small
branch of one of the pecan trees. I observed the bird until he
had swallowed three of the wormy tribe. I also noted that he
hopped to the other side of the tree just above a large crotch,
four or five feet away, to get the caterpillars. Investigation
displayed a colony of these, that had come down to shed their
skins, as the bird's source of supply. And to think that the bird
had directed the writer to this!
A week later, this time early (7 a.m.) in the morning, a blue-
jay was again observed on the lattice fence eating a caterpillar.
Soon there were two, to which two nearly matured young birds
were soon added. In this instance they flew to the ground near-
by for their supply of caterpillars, evidently finding some that
had dropt or fallen from the tree.
Two hours later two birds were again observed on the fence
and one on a branch, each preparing a caterpillar that they ate.
Single birds would leave and return several times with a fresh
caterpillar. In this instance, however, I failed to locate the
colony of "worms".
Examination of the fence showed the presence of some of the
whitish hairs that the birds had succeeded in removing from the
caterpillars. E. W. BERGER.
Official Organ of The Florida Entomological Society,
VOL. XVIII MARCH, 1935 No. 4
J. R. WATSON ......----.......... --... ..---..................................... Editor
E. W. BERGER ...-.........................--....-............. Associate Editor
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A NEW TABANUS (DIPTERA) FROM FLORIDA1
By G. B. FAIRCHILD
TABANUS CAYENSIS n. sp.
FEMALE. Length 9 mm., length of wing 7 mm., width of head 3 mm.
Frons unusually broad, about three times as high as wide, parallel-sided,
greyish pollinose. Basal frontal callus about as high as wide, rounded,
chestnut brown, connected with the large, oval, median callus. Vertex bare
and shiny, the shiny area extending downward on each side of the frons
next the eyes, and joined mesially to the median callus. Subcallus greyish
pollinose. Face and cheeks silvery grey pollinose with sparse white hairs.
Palpi white with scattered black hairs, hardly swollen basally and with a
rather blunt apex. Third antennal segment about four times as long as
the greatest width, the annulate portion about as long as the basal; dorsal
angle pronounced though blunt, placed about midway of the basal portion.
First two and basal portion of the third antennal segment yellowish, an-
nulate portion darker, the first two segments and apex of the dorsal angle
with black hairs. Dorsum of thorax black with whitish grey pollinosity,
giving it a steel grey appearance; usual lines obsolete. Antealar tubercle
reddish. Scutellum and pleurae of the same color as the dorsum. Eyes
bare, bronzy, with a single horizontal dark band (from relaxed specimen)
similar to but broader than that found in nigrovittatus Macq. Abdomen
with a broad dark median band, expanding to cover the fifth and succeed-
ing segments. This band is overlaid by a narrower band of grey pollinosity.
Sides of first to fourth segments yellowish, overlaid with sparse grey pol-
linosity. Posterior margins of all tergites narrowly yellowish, with scat-
tered pale hairs. Ventrally, the abdomen is yellowish on the first few
segments, becoming darker apically. The legs, except the proximal half
of the fore tibiae, and the middle and hind femora, are blackish. The wings
are faintly smoky, the veins narrowly edged with brown, the costal cell very
distinctly brownish, and the large stigma conspicuously yellowish brown.
There is no appendix on the third vein.
1 Contribution from the Dept. of Entomology of the Fla. Ag. Exp. Sta.
THE FLORIDA ENTOMOLOGIST
HOLOTYPE, female, M. C. Z. No. 20134. Stock Island, near Key West,
Monroe Co. Fla. VII-1-34.
PARATYPE, U. S. N. M. No. 50803. Big Pine Key, Monroe Co. Fla. VII-
This species seems nearest to conterminus Walker, from which
it may be distinguished by its much smaller size, smoky wings,
and the structure of the frons and antennae. From Hine's
description, it would also seem rather close to his fulvistriatus
from Mexico, except for the color.
EFFECT OF A FREEZE ON SOME CITRUS INSECTS
During the nights of December 12 and 13 Florida was swept
by a cold wave of unprecedented severity for so early a date. A
minimum temperature of 160 was recorded at Gainesville on the
12th, 230 at Lake Alfred on the 13th and 260 near Vero Beach,
at which places most of the following notes were made. This
afforded an opportunity to observe the effects of these tempera-
tures upon certain citrus insects and mites under natural con-
Florida Red Scale (Chrysomphalus aonidum). Of all the in-
sects observed this scale insect suffered the highest mortality.
On the campus at Gainesville where 160 was recorded, the mor-
tality was 98%. Of the 2% which survived all were on trees,
such as camphor, which, because of their canopy of leaves or
their situation near a building, doubtless were not exposed to
as low a temperature as that recorded in the open.
At Vero Beach in a low place in a grove where the citrus
trees were half defoliated by the cold no live scales were found
on the grapefruit still clinging to the trees. On higher ground
where there was little defoliation the mortality among these
scales was about 75%. A thermometer situated in the same
depression about a quarter of a mile away registered 260.
The Purple Scale (Lepidosaphes beckii). Scale insects of
this species from the same grapefruit on which the mortality
of 100% of the Florida red scale was recorded, showed a mor-
tality of about 80%. Those which escaped were in a protected
situation such as under other scales. But about half of the eggs
of this species escaped even where the scale insects themselves
were killed. Under many females the eggs near the outside
of the scale were killed while those in the middle of the mass
Cottony Cushion Scale (Icerya purchase). On January 9
the writer and Dr. Berger visited a tung grove near Gainesville
which had been infested with this scale. The adults and larvae
on the tung trees had all been killed but the eggs had mostly
survived and many had hatched and the old cottony masses were
swarming with young scales. The Vedalia lady-beetles (Rodolia
cardinalis) were present in all stages but chiefly as adults and
pupae. J. R. W.
VOL. XVIII-No. 4
THYSANOPTERA OF THE GEENTON
(Continued from page 46)
Glyptothrips barythripoides n. sp.
FEMALE (Aparous). General body color uniform narcissus yellow
(Dictionary of Color-Maers and Paul, Plate 10) with much red hypoder-
mal pigment. Antennae shading to brown at tip. Tube darker, harvest
yellow (Plate 12) tipped with blackish brown.
Head about 1.3 times as long as wide. Cheeks slightly arched, converg-
ing very slightly posteriorally. Dorsum deeply reticulated, ventral surface
less deeply reticulated. Eyes small, occupying but little more than a sixth
of the length and a third of the width of the head, protruding, showing
about six facets in lateral outline. Ocelli large but colorless, situated far
forward, posterior pair opposite middle of eyes; anterior directed forward.
Bordered by dark red crescents. Postocular bristles, about as long as eyes,
curved inward, blunt, thick and heavy but of the color of head and not
conspicuous, situated far out on cheeks. Post ocellar bristles and a pair
midway between the eyes and the posterior border small and inconspicuous.
Mouth cone very broadly rounded, short, scarcely reaching the middle of
the short prothorax.
Antennae about twice as long as head. Segments 1 and 2 concolorous
with the head, 3 to 8 progressively shaded darker with brown, pedicels of
3-6 brownish yellow. Sense cones long and thick but colorless. Bristles
darker, long, heavy blunt.
Prothorax but half as long as head and, including coxae, nearly three
times as wide as long. Outer bristles on posterior angles heavy, curved,
blunt, light colored; inner similar but smaller. Surface of thorax and
abdomen reticulated but much more finely so than head.
Pterothorax about as wide as prothorax, sides nearly straight and
parallel; anterior angles very sharp.
Abdomen thick and heavy; gray blotches in the middle of segments 3-8.
Bristles short, thick, and curved except two pair on segment 9, which are
slender, pointed and three-fourths and two-thirds respectively as long as
tube. Tube very long and heavy, with prominent longitudinal grooves
suggesting Barythrips or Symphyothrips.
Measurements (average of type and 4 paratypes) : Total body length
1.4 mm.; head, length .20 mm., width .155 mm.; prothorax, length .10 mm.,
width, including coxae .28 mm.; mesothorax, width .28 mm.; abdomen,
width .34 mm. Tube length .21 mm., width at base .08 mm., at apex .03
mm. Antennal segments, length (width) I, 41 (35); II, 48 (34); III, 61
(27); IV, 56 (29) ; V, 53 (26) ; VI, 46 (23) ; VII, 37 (19); VIII, 32 (12)
microns. Total length .33 mm.
MALE. Very similar to female but smaller, especially the tube. Meas-
urements of type. Total body length 1.19 mm.; head, length .17 mm., width
.14 mm.; prothorax, length .095 mm., width including coxae .21 mm.;
mesothorax, width .23 mm.; abdomen, width .26 mm.; tube, length .15 mm.,
width at base .065 mm., at apex .028 mm. Antennal segments, length
(width) I, 37 (30); II, 40 (28); III, 52 (25); IV, 47 (26); V, 44 (23);
VI, 42 (21); VII, 30 (18) ; VIII, 28 (10).
In shape of the antennal segments this species resembles very
closely the last. The pedicel of the 3rd segment is very long
THE FLORIDA ENTOMOLOGIST
and slender and has a subbasal annulation suggesting that of
the tritici group of Frankliniella. Its spines are much heavier
and the tube strikingly different.
Described from 16 females and 5 males all from moulding
leaves, Gainesville, Fla. (Nov. 3 & 17, 1929, & Jan. 19, 1930;
Winter Park, Fla., May 3, 1934; Gulf Hammock, Fla., Feb. 6,
1932 (A. N. Tissot) ; Micanopy, Fla., Aug. 13, 1933; Petersburg,
Va., Sept. 3, 1933 (J. W. Kea) ; Pearl River, Miss., Dec. 28, 1931
(Erdman West); Gatlinburg, Tenn., Aug. 15, 1932; decaying
.pine needles, Trenton, Fla., May 8, 1934 (A. N. Tissot).
The heavy tube, suggestive of Barythrips and Synthothrips
differentiates this species from all others. The antennae are
very similar to those of the preceding species.
Glyptothrips batesi n. sp.
FEMALE. Length about 1.0 mm. General color canary yellow (Maers
& Paul, Dictionary of Color, P1. II, L. 3) with much hypodermal pigment,
purple by transmitted light; bright red by reflected. Thorax, antennal
segment 3, and especially abdomen heavily shaded with brown; tube and
antennal segments 4-8 Mandalay brown.
Measurements: (Average of 9 paratypes and type). Total body length
from .86 mm. to 1.6 mm. (The variation in length is chiefly in the abdomen.)
Head, length .17 mm., width .13 mm.; prothorax, length .12 mm., width
(including coxae) .22 mm.; pterothorax, width .21 mm.; abdomen, greatest
width .33 mm.; tube, length .11 mm., width at base .066 mm., at apex .031
mm. Antennal segments, length (width) I, 37 (36) ; II, 44 (31); III, 63
(28) ; IV, 56 (28) ; V, 54 (24) ; VI, 51 (23.8); VII, 40 (20) ; VIII, 38 (11)
microns. Total length .38 mm.
Head about a third longer than wide; frons sharply angular, and ex-
tending well beyond the eyes, accuminate between the bases of the antennae.
Cheeks strongly arched, sharply constricted behind the eyes. Dorsum
faintly reticulated; cheeks more strongly. Postocular bristles stout and
long but nearly colorless, extending well beyond the eyes, capitate. Two
weak bristles between the eyes. Eyes small, showing from three to five
large facets in lateral outline, bulging, almost black, pilose.
Mouth cone broadly rounded reaching about half way across prosternum.
Antennae a little more than twice as long as the head; segment I concolor-
ous with the head; II somewhat, and III considerably darker; 4-8 almost
uniformly Mandalay brown, pedicels of IV and V lighter. Segment 8
Prothorax, a third shorter than the head and (including coxae) nearly
twice as wide as long. Long bristles with colorless capitate ends on anterior
and posterior angles and along the lateral margin at about a fourth of
the distance from the anterior margin. These bristles are slightly curved
and all fully half as long as prothorax.
Pterothorax, considerably narrower than the prothorax, sides nearly
straight and parallel. A single bristle near each lateral margin nearly
VOL. XVIII-No. 4
as long as those on prothorax. Legs concolorous with the head, tarsi a little
lighter. Fore tarsus with a stout curved spine.
Abdomen usually short and heavy but sometimes rather long and slender.
Darker than prothorax; in some specimens almost black. Bristles on
segment 9 nearly as long as tube, a short, straight, thick bristle on each
anterior angle of segment 1. Tube short and thick. Lighter in apical third.
Terminal bristles short; none as long as tube.
WINGED FEMALE. Very similar to apterous female except in the pres-
ence of ocelli and wings. Ocelli situated far forward; posterior pair but
little posterior to anterior margins of eyes; anterior on vertex between the
bases of the antennae; margined by orange-red crescents.
Wings, long (membrane reaching base of tube) but narrow, almost
uniformly brown in color.
MALE. Similar to female but usually smaller and abdomen much more
slender, usually somewhat darker. Legs more slender. Fore tarsal tooth
no larger than in female. Eyes somewhat larger, showing six or seven
facets in lateral outline.
Measurements: (Average of ten males). Total body length .95 mm.
Head, length .14 mm., width .12 mm.; prothorax, length .09, width (includ-
ing coxae) .21 mm.; pterothorax, width .18 mm.; abdomen, greatest width
.24 mm.; tube, length .096 mm., width at base .05 mm., at apex .028 mm.
Antennal segments, length (width) in microns, I, 28 (32); II, 40 (25);
III, 59 (24); IV, 51 (22); V, 46 (21); VI, 44 (20); VII, 36 (18); VIII,
33 (11). Total length .33 mm.
NYMPHS. Pale straw yellow in color with much hypodermal pigment,
purple by transmitted, yellow by reflected light. In the nymphs of G.
reticulatus the pigment is bright red.
Antennal segment I is concolorous with the head; II to VII progressively
darker; VI and VII grayish-brown. II is oval in outline; III to VI top-
shaped, pedicelled; VII club-shaped, pedicelled, and about as long as VI.
The nymph of G. reticulatus of corresponding length is considerably darker,
light brownish gray. Antennal segment II is colorless in apical .4. An-
tennal segments III to V cup-shaped, not pedicelled. VI nearly square in
outline. VII conical, longer than V and VI together, broadly joined to VI.
Described from several hundred apterous females and a single
winged one, and many males. This is a common species in mould-
ing leaves on the forest floor. Next to Trichothrips pergandei
Hood it is usually the most common thrips in such situations.
First collected at Gainesville, Fla., by Marston Bates, after whom
the species is named. Collected from many localities in Florida,
as far south as Mulberry in Polk Co., in the Cherokee National
Forest in northern Georgia, and in the Great Smoky National
Park near Elkmount, Tenn.
Glyptothrips eddeyi n. sp.
APTEROUS FEMALE. Body color brown (weathered oak-Maerz and Paul,
1930, Plate 8, L. 11) head and first four antennal segments lighter, legs
amber yellow. Body length about 1.1 mm. (varying from .81 mm. to 1.4 mm.)
THE FLORIDA ENTOMOLOGIST
Head about as wide as long, frons rounded, projecting but little in front
of the eyes; cheeks slightly rounded; dorsum with very weak reticulation,
usually visible only on the sides and near posterior margin. Postocular
bristles very long (93 microns in the type), pointed. A pair of conspicuous
bristles situated posterior to the postocular and a third of the distance to
the posterior margin of the head. Eyes small, showing 4 or 5 facets in
lateral outline, ocelli lacking. Cheeks sharply constricted behind the eyes
but eyes not so markedly bulging as in the other species. Mouth cone
broadly rounded, reaching about half way across the prosternum. Antennae
about 2.5 times as long as the head, first four or five segments concolorous
with or a little lighter than the head, last three or four rather abruptly
darker (weathered oak). Segment 2 cup-shaped, 3 top-shaped, 4 nearly
spherical (except for the pedicel), 5-7 oval in outline, 8 conical, all with
broad pedicels. Sense cones long and heavy but colorless, bristles also
Prothorax about twice as wide as long, bristles on posterior angles long
(outer about 116 microns), pointed. Legs rather slender and weak. Fore
Bristles on the 9th segment of the abdomen longer than the tube. Tube
about as long as the head and about half as wide at the base; lighter
distally; terminal bristles shorter than the tube.
Measurements: (Average of type and 9 paratypes). Total body length
1.1 (from .8 to 1.4). Head, length .13 mm.; width .134 mm. Prothorax,
length .12 mm., width (including coxae) .23 mm. Mesothorax, greatest
width .21 mm. Abdomen, greatest width .27 mm. Tube length .133 mm.,
width at base .068 mm., at apex .035 mm. Antennal segments, length
(width) I, 42.5 (37) ; II, 43.8 (32); III, 52 (34); IV, 46 (35); V, 45 (32);
VI, 43 (28); VII, 41 (26); VIII, 35 (16) microns. Total length .34 mm.
APTEROUS MALE. Similar to female but decidedly smaller, and body
darker in color, especially the abdomen. Fore femora not enlarged, fore
Measurements of type: Total body length .64 mm. Head, length .106
mm., width .116 mm. Prothorax, length .119 mm., width (including coxae)
.22 mm. Mesothorax, greatest width .21 mm. Abdomen, greatest width
.21 mm. Tube, length .117 mm., width at base .069 mm., at apex .032 mm.
Antennal segments, length (width) I, 35 (38) ; II, 35 (30) ; III, 44 (31);
IV, 40 (33) ; V, 40 (28) ; VI, 40 (25) ; VII, 37 (23); VIII, 35 (14) microns.
Total length .275 mm.
Described from eighty females and two males taken from
clumps of broom sedge (Andropogon) at Clemson College, S. C.
(first collected by Dr. C. O. Eddy, after whom the species is
named), also by O. L. Cartwright and J. C. Watts; near Ashe-
ville, N. C. (Arthur Jacot, collector) ; at Gainesville, Fla., by
the author; from a "swamp grass", Clemson College, S. C. (C. L.
Cartwright) ; bluegrass, Walhalla, S. C. (J. C. Watts) ;-Novem-
ber to February.
VOL. XVIII-NO. 4
Glyptothrips flavescens Hood
The male of this species seems never to have been described.
The writer has in his possession a single male collected at Ames,
Ia., Nov. 14, 1932 by Floyd Andre.
APTEROUS MALE. Identical with the female in color but appreciably
Measurements: Total body length 1.3 mm. Head, length .16 mm., width
.17 mm. Prothorax, length .105, width (including coxae) .245 mm. Meso-
thorax, greatest width .26 mm. Abdomen, greatest width (at segment 2),
.32 mm. Tube, length .14 mm., width at base .06 mm., at apex .028.
Antennal segments, length (width): I, 47 (37); II, 51 (37); III, 49
(31); IV, 46 (34); V, 47 (32); VI, 42 (28) ; VII, 69 (23) microns. Total
length .35 mm.
The following key will aid in the separation of the five species:
a. Antennae 7-segmented, color almost uniformly brown;
pterothorax much wider than prothorax.....-.flavescens Hood
aa. Antennae 8-segmented; pterothorax but little or no wider
than prothorax; at least partly yellow or yellowish brown.
b. Tube half as wide as head, heavy and ribbed, body
bristles long and slender, those at posterior angles of
prothorax nearly as long as prothorax-.... barythripoides
bb. Tube not half as wide as head, not ribbed or especially
c. Intermediate antennal segments abruptly contracted
to long, slender pedicels; postoculars short, barely
reaching the eyes, or entirely lacking; entire head
heavily reticulated ......-.....-.......................... reticulatus
cc. Intermediate antennal segments gradually contracted
to short pedicels; postoculars conspicuous.
d. Postoculars robust and capitate, reaching about
the anterior margins of the eyes; vertex faintly
but evidently reticulated..--............--- ..--- ....-batsei
dd. Postoculars slender, reaching far beyond the
eyes, pointed; reticulations evident only on sides
of head and near the posterior margin _.. eddeyi
Two species of this genus occur in the geenton, but in different
A. megacephalus Hood
This species was described from specimens taken under bark
of various trees. The writer has taken 42 females and 28 males
from (in order of abundance) Tillandsia sp. on tree trunks,
Spanish moss, "boots" of leaves on palm trees, dry leaves on
THE FLORIDA ENTOMOLOGIST
ground (3 specimens), bark of pecan trees, lichens, Jew's ear
fungus; at Gainesville, Astatula, Quincy and Citra, Fla.
A. nubillicauda n. sp.
APTEROUS FEMALE. General body color brownish yellow, abdomen dark-
er, especially the posterior segments. Antennal segments 4-7 and often 3
abruptly brown, 1 often shaded with brown. Posterior one-sixth of tube
Head considerably longer than wide, widest in posterior half, cheeks
strongly arched; faintly reticulated, provided with few or many thick,
short, knobbed, colorless bristles (a few such bristles occur on the femora
of A. megacephalus but not on the cheeks). Postocular bristles nearly as
long as the eyes, stout but colorless, strongly capitate. Dorsum smooth.
Eyes small, composed of only a few large facets; ocelli absent. Mouth
cone broadly rounded, reaching nearly to mesosternum. Antennae nearly
one and a half times as long as head. Segment II cup-shaped; III top-
shaped; IV-VI roughly spherical, except for the wide pedicels and pro-
longed on ventral side; VII conical.
Prothorax considerably shorter than head and (including coxae) about
twice as wide as long. A short, thick, capitate, colorless bristle on each
posterior angle and a much shorter one on each anterior angle.
Pterothorax considerably narrower than the prothorax; sides nearly
straight. Legs rather slender. Fore tarsus unarmed.
Abdomen thick and heavy. Bristles few and short, those on segment 9
about two-thirds as long as tube. Tube short and wide; terminal bristles
scarcely as long as the tube.
Measurements: Total body length 1.4 mm. (varying from 1.13 mm. to
1.6 mm.). Head, length .24 mm., wid:h .195 mm.; prothorax, length .15 mm.,
width (including coxae) .32 mm.; pterothorax .28 mm.; abdomen, greatest
width .41 mm. Tube, length .14 mm., width at base .08 mm., at apex .04
mm. Antennal segments, lengLh (width) : I, 44 (47) ; II, 58 (39); III,
59.5 (37) ; IV, 46 (39) ; V, 45.5 (35) ; VI, 44 (33); VII, 66 (28) microns.
Total length .34 mm.
MALE. Very similar to the female in coloration but considerably smaller,
especially the abdomen. Fore femora considerably enlarged and fore tarsus
armed. This tooth varies considerably in size, slightly curved.
Measurements: Total body length 1.04 mm.; head, length .20 mm.,
width .156 mm.; prothorax, length .115 mm., width (including coxae) .25
mm.; pterothorax, width .22 mm., abdomen, greatest width .27 mm.; tube,
length .14 mm., width at base .06 mm., at apex .03 mm. Antennal segments,
length (width) : I, 44 (41) ; II, 52 (34) ; III, 55 (34) ; IV, 43 (36); V, 41
(34); VI, 42 (31); VII, 62 (28). In lateral profile segments IV, V, and VI
are 48, 46 and 44 microns respectively in length. Total length .29 mm.
Described from about two hundred males and females taken at Gaines-
ville, Mayo, Ft. White, Monticello, Micanopy, Perry, Quincy, Astatula, and
Lower Matecumbe Key (G. F. Weber), Fla., and at Birmingham, Ala.
(H. E. Bratley), all from moulding leaves on the forest floor except a few
from Spanish moss. Taken during all months of the year.
This is distinctly an inhabitant of moulding leaves on the
forest floor, very distinct from the preceding species, in ecologi-
VOL. XVIII-No. 4
cal distribution, which is distinctly an inhabitant of the bark of
trees and epiphytes growing on tree trunks.
Easily told from A. megacephalus by the much lighter color,
longer and differently shaped head and the coloration of the tube.
That of megacephalus is sometimes clouded apically but the cloud
lacks the definite boundaries of this species and is not nearly
T. pergandei Hood
This is by far the most common species in moulding leaves
on the forest floor. Over two hundred individuals have been
taken in a half bushel of such leaves. It has been taken in
practically all stations where such material has been collected
thruout the northern half of Florida but has not been taken
south of Polk County. Also taken at Asheville and Bent Creek,
N. C. (Arthur Jacot, Coll.), Elkmount and Gatlinburg, Tenn.,
Petersburg, Va. (J. W. Kea, Coll.), Clemson College, S. C.
(J. C. Watts, Coll.). A few have been taken in woody fungi
(Polyporus versicolor, Lentinus), in epiphytes on tree trunks,
and a single specimen in a morning glory blossom at Pigeon
Forge, Tenn. It occurs in very dry situations, as in pine needles,
but is scarce in low, wet woods. It has been taken during all
months of the year but, like all the species of the geenton, is
relatively scarce at the close of the rainy season.
T. anomocerus Hood
This species, like the last, seems to be primarily associated
with moulding leaves, both deciduous and pine. Also on Rein-
deer moss, Tillandsia, Broomsedge, Indian Pipe (A. N. Tissot);
also taken on sedges in a clearing, and on wild onions at Clemson
College, S. C. (J. C. Watts, Coll.); Alachua, Liberty, Marion,
Lake and Taylor Counties, Fla.; Clayton, Ga.
T. bratleyi n. sp.
MACROPTEROUS FEMALE. Length 1.4 mm. to 2.5 mm. the difference
largely in the length of the abdomen. Color, light brown by reflected light,
brownish yellow by transmitted light, with much hypodermal pigment,
purple by transmitted light, orange by reflected. All tibiae, tarsi and
the first three antennal segments clear lemon yellow; tube brass yellow
(Maers & Paul, Plate II, L, 6) with a sharply defined brown apex.
Head about a third longer than wide. Cheeks either straight or con-
cave, either parallel or converging (sharply so in two females) posteriorly
but abruptly widened at base, rounded in front but broadly acuminate
between the bases of the antennae, vertex smooth, postocular bristles long
and slender, reaching beyond the anterior border of the eyes, capitate,
THE FLORIDA ENTOMOLOGIST
colorless. Eyes rather large, black by transmitted light, red by reflected;
facets very small. Ocelli large, sub-approximate, bordered by wide, red-
dish brown crescents. Labrum broadly rounded, much exceeded by the
labium which reaches the mesosternum. Antennae about 1.6 times as long
as head. Segments 1-3 light lemon yellow; 4 darker yellow shaded with
brown apically; 5-8 olive wood brown (Maers & Paul, P1. 15, E, 10), 5
paler at base. First two segments unusually narrow, 3-5 club-shaped, 6
oblong, 7 and 8 closely united into a conical mass but suture plainly
evident, oblique, 7 pedicellate. Sense cones and spines long and slender
Prothorax only about half as long as head, a long slender capitate,
colorless bristle at each posterior angle.
Legs rather short, fore tarsus with a sharp, curved tooth.
Wings well developed, membrane reaching the base of the tube, pro-
vided with a conspicuous brown band below the middle and a brown patch
at extreme base, with six or seven interlocated hairs on the posterior
margin of anterior wings.
Tube rather long and slender, sides sinuate in outline; terminal bristles
nearly as long as tube.
Measurements: Head, length .33 mm., greatest width (behind eyes)
.25 mm.; prothorax, length .16 mm., width (including coxae) .38 mm.;
pterothorax, width .38 mm.; abdomen, greatest width .42 mm., tube,
length .20 mm., width at base .093 mm., at apex .042 mm. Antennal
segments, length (width) in microns: I, 45 (47); II, 69 (37); III, 96
(40); IV, 92 (40); V, 66 (33); VI, 61 (35); VII & VIII, 85 (28).
Total length .54 mm.
APTEROUS FEMALE. Similar to macropterous female in color but one
much darker with antennal segments 1 & 2 yellowish brown; shorter, from
1.4 to 1.9 mm. in length. Cheeks straight and parallel. Eyes small, show-
ing about 3 large facets in lateral outline. Ocelli present, (in one female
only the anterior ocellus is present). Labium scarcely reaches the posterior
border of labrum.
Measurements of type: Head, length .25 mm., width .22 mm.; pro-
thorax, length .17 mm., width (including coxae) .38 mm.; pterothorax,
width .33 mm.; abdomen, greatest width .47 mm.; tube, length .19
mm., width at base .10 mm., at apex .038 mm. Antennal segments,
length (width) in microns: I, 51 (48); II, 63 (40); III, 85 (42); IV,
77 (42); V, 68 (36); VI, 65 (35); VII & VIII, 83 (32). Total length
(To be continued)
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