Title: Florida Entomologist
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Permanent Link: http://ufdc.ufl.edu/UF00098813/00331
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Title: Florida Entomologist
Physical Description: Serial
Creator: Florida Entomological Society
Publisher: Florida Entomological Society
Place of Publication: Winter Haven, Fla.
Publication Date: 1994
Copyright Date: 1917
 Subjects
Subject: Florida Entomological Society
Entomology -- Periodicals
Insects -- Florida
Insects -- Florida -- Periodicals
Insects -- Periodicals
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General Note: Eigenfactor: Florida Entomologist: http://www.bioone.org/doi/full/10.1653/024.092.0401
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Bibliographic ID: UF00098813
Volume ID: VID00331
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: Open Access

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Florida Entomologist
Official Organ of the Florida Entomological Society

VOL. VI WINTER NUMBER No. 3
DECEMBER, 1922

ON A COLLECTION OF THYSANOPTERA FROM
RABUN COUNTY, GEORGIA
J. R. WATSON
A vacation of fifteen days spent in north-eastern Georgia dur-
ing the latter part of August and the first days of September,
1922, gave the writer an opportunity to compare the thrips fauna
of that region with that of Florida.
There are no records of any considerable collection of thrips
from this region. The nearest localities that have been inten-
sively studied are about Clarksville, Tenn., where Morgan has
collected, and about Washington, D. C., where Hood has done
much of his collecting.
Rabun County is in the north-eastern corner of Georgia. It
is high and mountainous, the elevations ranging from about 2000
feet to 3900. As to the vegetation: here we found most of our
boyhood friends (and enemies too-such as nettles and bur-
docks) of northern Ohio. But in the valleys one notes such
southern plants as bitterweed (Helenium tenuifolium) and sweet
gums and on the mountain sides the belated blossoms of the
sourwood (Oxydendron arboreum) were conspicuous. On the
whole the vegetation is much like that of southern Ohio or
Kentucky.
The first observation to be made was the scarcity of thrips as
compared with Florida. They are by no means such an important
part of the fauna as with us. They do not force themselves upon
one's attention. One must hunt for them, otherwise he would
scarcely discover their existence.
The most productive collecting was, as usual, in flowers. Even
such an unlikely blossom as the Indian pipe supplied us with one.,
We recommend the goods advertised in The Florida Ento-
mologist. Please mention Entomologist when you write our
advertisers.










THE FLORIDA ENTOMOLOGIST


But the Florida flower thrips (Frankliniella bispinosa) was en-
tirely absent, its place being partly taken by its close relative F.
tritici. But this insect was by no means as common as ours. It
did not swarm in the blossoms, even of roses. Three or four per
blossom was the maximum. Still this was the most common
species. Numerous dissections of the heads of Compositae failed
to discover any Thrips abdominalis, so common in the heads of
composites in Florida.
Next after flowers these insects were most abundantly ob-
tained by sweeping grass and weeds. Our most common species
on grass, Haplothrips graminis, was entirely lacking. A new
species of Haplothrips was obtained from grass but the most
common species was Frankliniella fusca. This was much more
common than in Florida, where it is known chiefly as a pest of
tobacco, and nearly as common as its relative F. tritici.
Beating and sweeping shrubs brought in very few specimens.
The most common was Leptothrips mali, the black hunter, a
predaceous. species that was quite apt to be found on any plant
infested with plant lice. In vain were the young pines beaten for
our pine thrips Haplothrips pini.
In all twenty-three species were taken, four of which proved
to be new. Thrips quinciensis, Haplothrips gracilis, and Hop-
landrothrips flavoantennis have hitherto been taken only in
Florida. Thrips impar was described from Maryland and has
not hitherto been reported elsewhere. Frankliniella tenuicornis
has not heretofore been reported from America. Thus four spe-
cies have had their known range considerably extended.
It is thus seen that the Thysanoptera, like the plants, show a
mixture of southern and northern species.
A list of the species and their host plants follows:

THYSANOPTERA OF RABUN COUNTY, GEORGIA
Species Number Host Plants
taken
Aeolothrips bicolor Hinds............... 3... 3 .Grass.
Sericothrips variabilis (Beach)............ 1....Shrubs.
Chirothrips insolitus Hood.................... 1...Grass.
M alacothrips (?) .................................... 1.--.W eeds.
Heliothrips fasciapennis Hinds.....-...... 9.--.Grass (8), smartweed (Polygo-
num).
Heliothrips haemorrhoidalis (Bouche) 1....Shrub.
Thrips quinciensis Morgan.................... 2....in blossoms of Vernonia and
Polygala.












WINTER NUMBER


Thrips crenatus n. sp............................. 3 .- Pine, Lespedeza, bitterweed.
Thrips impar Hood,................................. 6....Indian pipe, Lespedeza (4),
grass.
Frankliniella fusca (Hinds).................35....Grass (29), pine (2), Lespedeza
(4).
Frankliniella minute (Moulton) (?).. 1....Red Clover.
Frankliniella tenuicornis, Uzel.............. 2....On grass (identified by R. C.
Treherne).
Frankliniella tritici (Fitch)..................36....A variety of blossoms.
Heterothrips auranticornis n. sp...........16....Blossoms of Helenium.
Haplothrips rabuni n. sp....................... 5....Grass.
Haplothrips statices Holiday................ 4....Grass.
Haplothrips verbasci (Osb.).................-14....Mullein.
Haplothrips angustipennis n. sp........... 2....Grass.
Haplothrips gracilis Watson.................. 1
Leptothrips mali (Fitch)........................16....On many shrubs and herbs.
Hoplandrothrips flavoantennes(Wats.) 1....Oak.
Hoplandrothrips pergandei (Hinds).... 1....Grass.
Idolothrips armatus Hood...................... 1....On wild cane (Arundinaria).

Thrips crenatus, n. sp.
Female. Length about 0.8 mm. (0.74 to 1 mm.). Color dark brown,
thorax lighter with a little orange hypodermal pigment. Without promi-
nent bristles except near the end of the abdomen.
Measurements: Head, length .075, width .105; Prothorax, length .113,
width .15; Mesothorax, width .207; Abdomen, width .214.; Antennae, total
length .173 mm,

Antennal segment 1 2 3 4 5 6 7
Length ..............-------...... 18 27 32 28 22 37 16 microns
Greatest width ...----.. .. 19 21 18 18 15 16 7 microns

Head about a third wider than long and two thirds as long as prothorax
into which it is deeply retracted. Cheeks very slightly arched. Plainly
sculptured with transverse anastomozing lines, a row of minute bristles
behind each eye. Eyes dark, large, occupying about two-thirds the length
and .7 the width of the head; non pilose; facets large. Ocelli large, light
brown; widely separated, posterior situated opposite the posterior two-
thirds of the eyes; bordered by deep orange crescents. Antennae rather
short, from twice to two and a third times as long as the head. Segments
1 and 2 but little lighter than the head; 3-5 varying from yellowish brown
(lighter at the base) to dark brown concolorous with the others'; 6 and 7
dark brown. 1 cylindrical, about as wide as long; 2 urn-shaped with a very
broad base, conspicuously wider than any of the others; 3 urn-shaped,
abruptly narrowed to a slender pedicel; 4 oval, 5 smaller, urn-shaped; 6
cylindrical; 7 conical. Sense cones and bristle all short, colorless, almost
invisible; a sense cone on the outer apical angle of segment 3 thick and
heavy.
Prothorax large, sides convex'and diverging posteriorly, without sculp-
ture, a short, colorless bristle on each posterior angle.












THE FLORIDA ENTOMOLOGIST


Mesothorax sculptured in the middle of the dorsal surface, sides bulging.
Metathorax with nearly straight but diverging sides. Legs almost uni-
formly brown, but little lighter apically. Wings uniformly brown except for
a small colorless area about .2 the length from the base. Costal fringe of
hairs scanty, absent from basal half. Veins rather prominent; costal
bearing from 23 to 26 bristles, the others from 5 to 7, scale 5.
Abdomen with a few short, brown bristles on segments 9 and 10. Dorsal
surface faintly sculptured. The posterior margin of each segment is bor-
dered with a series of about 20 rounded lobes. On the posterior segments
these are more difficult to detect.
Male not seen.

Described from three females taken in Rabun Co., Ga., on
Lespedeza, pine and bitterweed (Helenium). Readily recognized
by the dark color, short intermediate antennal segments and
created posterior borders of abdominal segments.
Type in the author's collection. Paratype in the National
Museum.

Heterothrips auranticornis, n. sp.
Female. Color of the body a uniform deep brown, tip of fore femora, and
both ends of others, and of all tibiae, and most of the tarsi, brownish yel-
low. Antennal segments 3 and 4 yellow, conspicuously shaded with orange.
Measurements: Total length, females 1.2, male .8; head length, females
.112, males .107; width, females .15, males .133; Prothorax, length, females
.13, males .128, width, females .22, males .18; Mesothorax, width, females
.23, males .20; Abdomen, width, females .30, males .14; total, females .25,
males .22.

Antennal segments | 1 2 3 4 5 6 7 8 9
Length ....---.-....---...- 20 30 55 39 28 32 24 | 20 19 microns
Width .....--...-...-.... 19 26 53 35 27 28 19 18 15 microns

Head about a third wider than long, widest behind the eyes. Cheeks
arched, roughened, and bearing a few short, stiff bristles. All the dorsal
surface behind the eyes striated with a half dozen anastomozing lines.
Frontal costa deeply emarginate. A row of four minute bristles behind
each eye and posterior ocellus. One in front of each posterior ocellus
and a minute one near the inner anterior angle of each eye, opposite the
anterior ocellus. Eyes dark, very large, occupying about .7 the length and
.8 the width of the head, non-protruding, pilose, facets very large. Posterior
ocelli very large, situated opposite posterior third of the eyes and touching
their margins. Anterior about half the diameter of the posterior and about
the size of the facets of the eyes; situated on the edge of the frontal emar-
gination and directed forward. Mouth cone reaching about half way across
the prosternum; sides almost straight up to the prolonged but rounded apex.
Antennae 9-segmented, 2.2 as long as the head. Segment 1 short and thick,
concolorous with the head; 2 lighter; 3 and 4 yellow with considerable
orange pigment; 5 at least two-thirds yellow but dark brown at the extreme











WINTER NUMBER


base and apex; 6 brown but yellowish on basal half; 7-9 dark brown. 3
long wedge-shaped with a narrow base; 4 and 6-9 barrel-shaped; 5 oval;
4-6 with short broad pedicels; margins, especially of 3 and 4, conspicuously
crenate. Hairs and sense cones very pale, short and inconspicuous. A distal
ring of sensoria on segments 3 and 4.
Prothorax but little longer than the head and 1.7 as wide as long; widest
posteriorly. Anterior margin, and sides nearly straight; posterior margin
much arched. Dorsal surface striated posteriorly. A short, thick spine on
each anterior angle and two on each posterior; a row of eight minute ones
along the anterior margin and about a score of others scattered over the
dorsum. Legs rather slender. Fore femora but little thickened. Mem-
branes of fore wings dark brown except two minute areas near the base;
.075 mm. wide at the base (exclusive of scale); rather abruptly narrowed
at about a third of their length to half the sub-basal width; length ten
times that of the sub-basal width. Costal vein with about 31, anterior with
24 and posterior vein with 20 bristles.
Abdomen not pubescent but provided with a number of short bristles, a
row along the posterior margin of each segment being especially promi-
nent.
Males similar to the females but smaller. Fore femora considerably en-
larged.

Described from fourteen females and two males taken from
the heads of a composite (Helenium) in Rabun County, Ga. Type
in the author's collection. Paratypes in the National Museum and
in that of the University of Florida.

Haplothrips rabuni, n. sp.
Female. Length about 1.5 mm. Color dark brown to black with some
reddish hypodermal pigment; antennal segment 3 and usually (but not
always) fore tarsi and apical inner portion of fore tibiae yellowish brown.
Measurements: Head, length .20, width .166; Prothorax, length .122,
width .241; Pterothorax, width .277; Abdomen, width .273; Tube length
.108; width at base .054, at apex .031 mm. Antennae, total length .27 mm.

Segment 1 2 3 4 5 6 7 8
Length ..-...- -----------...... ---. .. 21 40 41 46 42 40 37 26 microns
Width ..........--...-.....-- ..... 27 26 22 29 27 27 26 14 microns

Head longer than wide, broadest at the middle, cheeks gently arched,
slightly convergent posteriorly; vertex rounded, slightly produced. Post-
ocular bristles fairly long but, like all the other bristles of head and
thorax, almost or quite colorless and difficult to detect. Eyes medium sized,
occupying slightly more than a third of the length of the head, not pro-
truding, not pilose. Ocelli large, yellowish, the anterior on the extreme
vertex of the head and directed forward, the posterior pair opposite the
anterior third of the eyes. Antennae about a third longer than the head.
Segment 1 (and sometimes 2) concolorous with the head; 3 yellowish brown;
4 and 5 light brown without yellowish bases; 6-8 darker brown; 1 short-












THE FLORIDA ENTOMOLOGIST


cylindrical; 2 urn-shaped; 3-6 oblong elliptical, 3 quite markedly pedicellate,
4-6 with broader, shorter pedicels; 7 barrel-shaped, truncate at the apex
and broadly united with 8; 8 sub-conical. Sense cones and bristles short,
colorless and inconspicuous. Mouth cone blunt, reaching past the middle of
the prosternum.
Prothorax small, about .6 the length of the head and, including coxae,
twice as wide as long. Coxa bears a short but thick and brown bristle, the
only conspicuous one on the anterior portion of the body, others colorless,
mostly blunt at apex; a pair on each posterior angle of medium length.
Pterothorax considerably wider than prothorax. Sides slightly converging
posteriorly. Wings rather short, membrane reaching but little past the
middle of the abdomen; colorless except for a decidedly brown area at the
base of the primaries; primaries markedly narrowed in the middle, fringe
rather sparse, of medium length, with 6 or 7 interlocated hairs. Legs
rather slender, except fore tarsi and tibiae, concolorous with the body; fore
femora but slightly enlarged; fore tarsus with a small, short, acute tooth.
Abdomen rather long and slender, bristles rather short, light brown to
colorless and pointed. Tube rather short, terminal bristles but little longer
than the tube.
Male not seen.

Described from four females taken from grass and sedges
along a small stream at Clayton, Rabun County, Ga. Type in
the author's collection. Paratypes in the National Museum and
in that of the University of Florida.
Close to H. graminis Hood, but differs in the shorter and
darker antennae, darker color, smaller prothorax, larger ptero-
thorax, longer, more slender abdomen, longer intermediate an-
tennal segments and colorless bristles.

Haplothrips angustipennis, n. sp.
Female. Body length about 1.3 mm. (from 1.14 to 1.46). Color almost
uniformly dark mahogany brown, fore tibiae and tarsi and intermediate
antennal segments yellowish brown.
Measurements: Head, length .185, width .151; Prothorax, length .12,
width .25; Mesothorax, width .25; Abdomen, width .227; Tube, length .106;
width at base .061, at apex .031. Antennae, total length .29 mm.

Segment 1 2 3 4 | 5 6 7 1 8
Length .................................... 26 37 45 50.5 44 40 38.5 26 microns
Width -................................. 26 24 20 25 23 23 21 16 microns

Head about a third longer than broad. Cheeks slightly arched, converging
slightly posteriorly, somewhat roughened and bearing a few short bristles.
Postocular bristles conspicuous, pointed, nearly as long as eyes. Eyes
large, occupying nearly half the length of the head, not pilose, facets
large. Ocelli large, larger than facets of the eyes, brownish yellow, posterior
pair situated opposite the anterior .4 of eyes and contiguous with their












WINTER NUMBER


margins; anterior directed forward. Mouth cone reaching about half way
across the prothorax, abruptly constricted near the base but very broadly
rounded at the apex. Antennae 8-segmented. Segment 1 cylindrical, con-
colorous with the head; 2 urn-shaped, abruptly constricted to a very broad
pedicel, concolorous with the head except the yellowish brown apex; 3
obovate, narrower than either 2 or 4, gradually narrowed to a broad base,
yellowish brown, darker along the sides and with a broad, colorless band
at the apex, usual sense cones present but colorless and inconspicuous; 4
ovate with a short, broad pedicel, basal third concolorous with 3, but re-
mainder darker, the colorless collar at the apex narrow; 5 and 6 barrel-
shaped, pedicel shorter and narrower than in 4, dark brown; 7 cylindrical,
sides but slightly arched and converging slightly apically; 8 unusually
large, margin conspicuously crenate. All antennal bristles thin, pale brown
and inconspicuous.
Prothorax (including coxae) about twice as wide as long, trapezoidal in
outline, much widened posteriorly, posterior margin arched, posterior angles
abruptly rounded and bearing a pair of sharp-pointed, light colored bristles
of medium length; coxae each bearing one short, dark, thick bristle and a
pair of very short, thorn-like spines; anterior angle with a short heavy
bristle.
Mesothorax broad, with very acute anterior angles and nearly straight
sides which converge slightly posteriorly. Mesothorax somewhat narrower,
sides more arched and more constricted posteriorly. Wings rather weak,
membrane scarcely reaching the eighth abdominal segment, quite narrow
except at the extreme base, unusually deeply constricted for a Haplothrips,
to a diameter about half that nearer the apex. Fringing hairs moderately
long, seven interlocated ones. Legs rather slender, dark, fore femora but
little thickened; fore tarsus with a small tooth.
Abdomen long and slender, destitute of conspicuous bristles, those of the
ninth segment shorter than the tube. Tube of moderate size, sides slightly
concave, terminal bristles about as long as the tube.
Male not seen.

Described from two females taken from coarse marsh grasses
at Clayton. Type and paratype in the author's collection.

Hoplandrothrips flavoantennis (Wats.)

The female only was originally described. (Liothrips flavo-
antennis, Ent. News, March 1916, p. 129.) A male was collected
in Georgia.

Male. Color uniformly dark brown except antennal segments 3-8, which
are bright yellow. (In some females also segment 8 is yellow, also segment
2 may be brown.)
Measurements: Total length 1.7 mm.; head, length .235 mm., width
.18 mm.; prothorax, length .13 mm., width including coxae .29 mm.; meso-
(Continued on page 47)











he
FLORIDA ENTOMOLOGIST
Official Organ of The Florida Entomological Society, Gainesville,
Florida.

J. R. WATSON -...--.........-..- ....------.--- ....---........------- Editor
WILMON NEWELL.....----....----..-- --------......-- Associate Editor
A. H. BEYER ............-..... ---......................Business Manager
Issued once every three months. Free to all members of the
Society.
Subscription price to non-members is $1.00 per year in ad-
vance; 35 cents per copy.


THE ENTOMOGENOUS FUNGI
October was an unusually rainy month in Florida. According
to the Weather Bureau the average for the state was 8.28 inches
above normal, and only one station in peninsular Florida (New
Smyrna) reported a deficiency. There was not a single day
without rain at some station. Due undoubtedly to this metero-
logical condition the entomogenous fungi have been unusually
efficient this fall thruout the citrus belt. A careful count of some
hundreds of citrus leaves at Gainesville showed that the fungi
had killed 97.2% of the fall brood of whitefly-a percentage of
kill seldom equalled in commercial spraying. In the order of
their efficiency the fungi ranked as follows: the brown fungus,
the red aschersonia, Microcera, the cinnamon fungus.


RECENT PUBLICATIONS
Bulletin 165 of the Experiment Station and the October num-
ber of the Quarterly Bulletin of the State Plant Board are of
unusual interest and importance to Florida and other cotton-
growing states. In this bulletin Mr. Geo. D. Smith presents "A
Preliminary Report Upon an Improved Method of Controlling
the Boll Weevil". "The gist of the method may be summarized
in two sentences, as follows:
1. Remove all squares from the cotton plants about June 5
and destroy them.
2. Follow this at ,once with a thoro application of calcium
arsenate or lead arsenate, using a suitable dusting machine."










WINTER NUMBER


These measures reduce the weevils to such small numbers
that the cotton is enabled to set a good crop of bolls before the
weevils again become abundant. Where this method of control
has been tried the past year practically as much cotton has been
harvested as would have been gathered were no weevils present.
The principle underlying this method of control is that to-
wards which the best practice in economic entomology is stead-
ily tending, viz., a very thoro cleanup of the insect and hence
less need of frequent repetition, as near an approach to eradi-
cation as is practicable rather than temporary palliatives. This
method of dealing with the boll weevil parallels quite closely the
latest recommendations for the control of the curculio in peaches
and plums, i. e., to pick up and destroy the drops with their
contained larvae as well as poisoning the adults.


Farmers' Bulletin 950, by Philip Luginbill, treats of the South-
ern Corn Rootworm (Diabrotica 12-punctata). Altho a common
insect in Florida, this beetle is with us not a serious pest of corn.
In the extreme northern part of the state it takes a small per-
centage of the young corn. The author recommends planting in
late April to escape damage from this insect. This beetle is
very common in oat fields about Gainesville from January to
March.


Dr. H. S. Davis, until a year ago head of the department of
zoology in the University, is the author of 'A New Bacterial
Disease of Fresh Water Fishes"-Document 924, U. S. Bureau
of Fisheries.


Carl B. James, Horticulturist for the L. and N. Ry., has re-
cently published a very attractive and valuable bulletin on the
satsuma orange.


THE SCOLDING BUTTERFLY
Dear Friends of the Entomological Society:
When a person arrives in a new country, the first things that
attract his attention are the objects and customs to which he
is not accustomed in his own country. So it was with me when I










THE FLORIDA ENTOMOLOGIST


arrived in Brazil. I saw hundreds of interesting and important
things that the average Brazilian, who has lived among them
always, "never saw". Brazil, as you know, is noted for its mag-
nificent butterflies and gigantic insects of various orders. Some
of the unusual insects are credited with being extremely ven-
omous. I was told of one insect so venomous that if it lights
on the trunk of a tree, the tree dies from the effects. Entomolo-
gists, being extremely innocent, capture these insects with im-
punity. The thing I want to tell you about today is the Scolding
Butterfly, Ageronia feronia, L.
My friends in Florida will naturally think that I have gone
"louco" with the heat. But remember that in Brazil we are now
in mid winter, and some mornings the weather is dreadfully
cold (?). At least my Brazilian friends say that it is. And the
Centigrade thermometer says that the temperature is some seven
or eight degrees above zero. Now what I was going to tell you
about is the butterfly that has a voice. I am sending you a pho-
tograph that represents her sitting on a palm tree. I know that
it is a female which does the talking because the voice is high
keyed and staccato. A male never could get up so much energy.
The scolding is done probably with organs similar to those
used by crickets or katydids. The sound is not quite as strong
as that of the big katydids nor of the big black cricket. Organs
similar to those possessed by these insects are located near the
base of the wings. They make this snapping noise only when on
the wing. Sometimes they scold their mate and sometimes they
scold,the entomologist who is passing by.
Another peculiarity of this species is that it looks very much
like the lichens that inhabit tree trunks. The photograph I en-
close you brings out this peculiarity very strikingly.
Now if there is any entomologist present who doubts the
correctness of these observations, let him look up Holland' and
also Sharp, who likewise became affected with the Brazilian
heat.
Very truly yours,
(Signed) P. H. ROLFS.
Vicosa, E. F. Leopoldina,
Minas Geraes, Brazil.
July 27, 1922.










WINTER NUMBER


HYMENORUS OBSCURUS AS A PEST OF CITRUS
(COL. CISTELIDAE)
J. R. WATSON
Occasionally one sees on the bark of citrus and other trees a
dense colony composed of hundreds of little black beetles. The
beetles are oval in shape, less than a quarter of an inch long
and covered with grayish-brown hairs. In the late afternoon the
beetles leave their resting place and go in search of food which
consists mostly of lichens and other growths on the bark of the
trees. But it seems that they may occasionally become pests.
In July Mr. S. B. Jones of Orchid, Fla., sent in to the Experi-
ment Station a number of these beetles with the statement that
they had been feeding extensively on "June bloom" and other
tender growth of his trees. In confinement they feed greedily
on tender citrus foliage.
The writer has also recently caught these beetles eating out
freshly inserted buds in a nursery. It would seem that this beetle
must be included among the minor pests of a citrus tree.
This beetle should not be confused with the downy darkling
beetle (Epitragus tomentosus), which it considerably resembles
in shape and color. The latter is larger, never collects in colo-
nies, and is one of the most beneficial insects in a citrus grove.
Its food habits are very similar to those of lady beetles and in
many groves it is much more abundant than even the twice-
stabbed lady-beetle.

A NEW CITRUS INSECT
A caterpillar recently found feeding on the leaves of a young
grapefruit tree at Orlando, Florida, proved on rearing to ma-
turity to be Prodenia latifascia Walker.
Altho this insect probably is of no economic importance as a
pest, its presence seems to be a new record for citrus insects.
Hence this note may be of interest.
The identification was made by Mr. Wm. Schaus of the Na-
tional Museum, who says that P. latifascia Walker is essentially
a tropical insect found from Mexico to Argentina, including
Jamaica, Cuba, Haiti, St. Lucia. The only previous records of
its breeding in the United States is one each from onions and
alfalfa in Texas. Nothing is known of its host plants in other
countries.











THE FLORIDA ENTOMOLOGIST


The insect belongs to the cut worm family and resembles
somewhat, both in larval and adult form, some of our common
pests, as the sweet potato caterpillar, P. commelinae, and the cot-
ton boll cut worm, P. ornithogalli. When full grown the larva
was about 2 inches long and of a brownish gray velvety color
with a wide dark band down the dorsal surface and 3 narrow
golden brown stripes along each side; ventral surface greenish
brown.
It pupated July 31st in soil and the moth emerged August
17, 1922.
ARTHUR C. MASON.



THE PSOCID OF THE OAKS
FRANK STIRLING
Thruout the south-eastern United States, especially in Flor-
ida, the water oaks frequently take on a bright silvery-grey col-
oring which shows particularly on the larger limbs and trunks.
Close observation shows this to be caused by a silky web which
completely covers the surface. This web is of a bright, clear
color and glistens in the sun and on bright moonlight nights,
making an effect well worth noticing.
By removing a part of the web with a pen knife or sharp
stick one may, by carefully observing, note countless numbers
of a tiny insect. This little insect is known as a psocid (Psocus
sp.) and is related to the book-lice. These psocids are useful
rather than injurious, as they feed on fungus growths and
lichens which grow on the trunks and larger limbs of the oaks.
They apparently spin this fine, gauzy web for their protection
against birds and other enemies which would otherwise destroy
them.
This insect is reported as occurring in especial abundance on
water oaks in the vicinity of Lakeland, Orlando, Sorrento, Dade
City and Gainesville, Fla., along the Gulf Coast in the vicinity
of New Orleans, La., and near Mobile, Ala. To those not in-
Sformed the appearance of this grey, silvery covering is often
viewed with alarm.
The webs, together with the insects, will disappear after a
short time and the only effect upon the tree will be a cleaner
and healthier appearance of the bark.


S44












WINTER NUMBER


A NEW THRIPS FROM CITRUS IN ALABAMA
J. R. WATSON
Haplothrips harnedi, n. sp.
Female. Dark brown, 3rd antennal segment and distal half of tibiae
yellowish brown.
Measurements: .Total length 1.36; head, length .18, width .13; prothorax,
length .15, width .24; mesothorax, width .22; abdomen, width .27; tube,
length .108, width at base .057, apex .033.

Antennal segment 1 2 1 3 |4 5 6 | 7 8
Length ...-----...-----..-.------.. 28 45 45 48 40 38 39 27 microns
Width -------...---------- 30 28 25 26 23.5 21 17.5 11 microns

Head a third longer than wide; dorsal surface with a few faint cross
striations; cheeks slightly convex, converging a little posteriorly. Post-
ocular bristles nearly as long as the eyes, with dilated, colorless tips. Eyes
medium sized, not protruding, not pilose, black, triangular in outline.
Ocelli medium sized, widely separated, anterior situated far forward, post-
erior pair opposite the anterior .4 of eyes and near their margins, bordered
by dark crescents. Mouth cone broadly rounded, reaching scarcely to the
middle of the prothorax. Antennae 1.6 times as long as head; segments
1, 6, 7, and 8, concolorous with the head, 2 and 5 a little lighter, 4 consid-
erably lighter, 3 brownish yellow to yellowish brown with colorless apex;
sense cones colorless and inconspicuous, spines small, light brown.
Length of prothorax a little greater than width of head, width (including
coxae) 1.6 times the length. Prominent spines near the anterior angles,
on coxae, and near the posterior angles; all with dilated tips.
Pterothorax distinctly narrower than the prothorax, sides straight, con-
verging posteriorly. Legs rather short, femora lighter than the body; fore
pair slightly enlarged. Wings rather weak but membrane reaching the
fifth segment. Fringing hairs sparse, about three interlocated ones on
primaries.
Abdomen variable in shape. In some individuals excessively long and
slender, in others but little more than twice as long as wide. Bristles few;
some of those on the last segment have dilated tips but the longest have
acute tips. Tube rather small, sides rather abruptly dilated at the base;
terminal bristles short.
Male not seen.

Described from nine females collected on citrus trees in south-
ern Mississippi and sent to the author by Prof. R. W. Harned.
Type in the author's collection. Paratype in the National
Museum.
Close to H. funki Watson, but differing in the darker color
of the tibiae, tarsi, and third antennal segment, smaller size,
relative lengths of antennal segments and especially the narrow
pterothorax.










THE FLORIDA ENTOMOLOGIST


PERSONALS

Dr. Carl J. Drake is now state entomologist of Iowa.

Dr. Wilmon Newell has been called north by the death of his
father.

Mr. W. L. Goethe is teaching science in the Live Oak High
School.

The potato growers of the Hastings district sent Dr. C. D.
Sherbakoff to Maine to select seed for them.

Mr. C. M. Berry spent part of the summer in New York State
inspecting sources of seed used by the Sanford growers.

Dr. W. S. Blatchley left Indianapolis on November 14 for Rio de
Janeiro, Brazil. He expects to return to Dunediri the last of
March.

Mr. A. H. Beyer, assistant entomologist of the Experiment
Station, plans to spend several weeks at Harvard studying en-
tomogenous fungi.

According to Science Mr. John Belling, former plant breeder
in the Experiment Station and now of the Eugenics Laboratory
at Cold Spring Harbor, N. Y., received the doctorate from the
University of Maine in June.

Dr. H. S. Dozier, former assistant in the Experiment Station,
is in charge of the camphor scale investigations of the U. S.
Bureau of Entomology and is stationed in New Orleans. He
received the doctorate from Ohio State in June.



REPORT OF MEETINGS OF THE FLORIDA ENTOMOLOGI-
CAL SOCIETY
September 25. The Society met in Language Hall at 4:30
o'clock, President Stirling in the chair. Those present were:
Beyer, Chaffin, Goodwin, Merrill, Montgomery, Rogers and Wat-
son. New members elected were: Miss Georgia Berger, teacher
of Biology in Tampa High School; Miss Bernice Dew and Ru-
dolph Baldwin, teacher and student in Alachua High School; and
Mr. S. E. Neal, of the firm of Neal & Neal of Jacksonville.











WINTER NUMBER


The question of continuing the joint meetings with the Horti-
cultural Seminar was discussed and referred to the Executive
Committee.
Under "Brief and Timely Notes" Prof. Watson spoke of ob-
servations on the Mexican Bean Beetle in Rabun County, Geor-
gia, and the capture of the greenhouse thrips out of doors. Mr.
Goodwin reported the discovery of European Foul brood in
Seminole County.
The address of the evening was given by Dr. J. S. Rogers, on
the Museum of Zoology of the University of Michigan. This is
a research museum rather than an exhibition museum. Dr.
Rogers spoke of the progress made in surveys of the different
groups, particularly insects. The talk was very interesting and
showed that Dr. Rogers is doing a great part in the carrying
out of their plans by working up the family Tipulidae (crane
flies) of the order Diptera.



November 1. The Society met in joint meeting with the
Horticultural Seminar, Major Floyd in the chair.
Members present: Montgomery, O'Byrne, Chaffin, Beyer,
Lord, Watson, Berger, Stirling, Merrill, and Stone. Mr. E. R.
Mezgler of Hightown, N. J., was elected to membership.
The paper of the evening was by Professor Floyd on "A Pro-
posed Score Card for Judging Citrus Lands". It was freely dis-
cussed by members present.
A. H. BEYER, Secretary.


ON A COLLECTION OF THYSANOPTERA FROM RABUN
COUNTY, GEORGIA
(Continued from page 39)
thorax, width .29 mm.; abdomen, greatest width .29 mm.; tube, length .16
mm., width at base .064 mm., at apex .034 mm. Antennae, total length .44
mm.; segment 1, 27; 2, 50; 3, 77; 4, 77; 5, 69; 6, 67; 7, 55; 8, 29 microns.
Head about 1.5 times longer than wide. Eyes large, occupying nearly
a third the length of the head and fully a third of the width, slightly pro-
truding, non-pilose, red by reflected light. Ocelli large, yellowish, situated
far forward. The anterior on the large frontal lobe between the bases of
the antennae and directed forward. The anterior margins of the posterior
pair about opposite the anterior margins of the eyes. Mouth cone long,
tapering, almost reaching the mesosternum. Antennae long and slender,








THE FLORIDA ENTOMOLOGIST


nearly twice as long as the head. Segment 1 and base of 2 concolorous
with the head, apex of 2 lighter brown; remaining segments clear bright
yellow. Abdomen long and slender, tapering gradually to the 8th segment
and then more abruptly; bristles on the posterior angles of the segments
progressively longer, those on the 9th nearly as long as the tube. Tube long
and slender. Otherwise identical with the female.
Described from a single male taken from oak at Clayton.



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