Title: Florida Entomologist
Full Citation
Permanent Link: http://ufdc.ufl.edu/UF00098813/00344
 Material Information
Title: Florida Entomologist
Physical Description: Serial
Creator: Florida Entomological Society
Publisher: Florida Entomological Society
Place of Publication: Winter Haven, Fla.
Publication Date: 1919
Copyright Date: 1917
Subject: Florida Entomological Society
Entomology -- Periodicals
Insects -- Florida
Insects -- Florida -- Periodicals
Insects -- Periodicals
General Note: Eigenfactor: Florida Entomologist: http://www.bioone.org/doi/full/10.1653/024.092.0401
 Record Information
Bibliographic ID: UF00098813
Volume ID: VID00344
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: Open Access


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Official Organ of The Florida Entomological Society, Gainesville,

PROF. J. R. WATSON.-.........----- ---...........___-....---------Editor
PROF. WILMON NEWELL.............-- ....----- ..----...Associate Editor
DR. E. W. BERGER .-.........-------------Business Manager
Issued once every three months. Free to all members of the
Subscription price to non-members is $1.00 per year in ad-
vance; 25 cents per copy.

Since the publication of "The North American Species of
Teleonemia Occurring North of Mexico" (Ohio Journal of Sci-
ence, Vol. XVIII, pp. 323-332, 1918) the ivriter has received
through the kindness of several workers many specimens of
Teleonemia from North America and the West Indies. The new
species described herein is the same form as listed by Van Duzee
in "Notes on Jamaican Hemiptera" (Bulletin of the Buffalo
Society of Natural Science, Vol. VIII, pp. 3-77, 1908) under the
name Teleonemia scrupulosa Stal. The insect is named in the
honor of Prof. E. P. Van Duzee.
Teleonemia vanduzeei new species.
Antennae moderately long, slender, sparsely pilose; first segment a
little stouter than and subequal in length to the second; third segment
moderately long, slender, about three times as long as the fourth; fourth
segment sibequal in length to the first and second conjoined. Head armed
with five moderately long, porrect spines, the spines arranged as in related
species. Length, 3.15 mm.; width, 1.2 mm.
Pale testaceous or light brownish testaceous, with dark brown markings.
Pronotum brown, slightly tinged with ferrugineous, tricarinate, lateral
carinae slightly diverging posteriorly; paranota distinctly uniserate, not
quite reflected back against the pronotum proper; carinae rather thin, all
strongly raised and with a single row of rather large areolae, the median
carinae raised anteriorly and projecting subangularly over the base of head.
Elytra constricted a little beyond the middle, with dark brown to nearly black
markings in discoidal and sutural areas; costal and subcostal areas unise-
riate, the areolae rather large; sutural area with the color marking tending
to form a transverse band a little before the apex; discoidal area bounded
*Contributions from the Department of Entomology, The New York State
College of Forestry, Syracuse, N. Y.


by strongly raised nervures, faintly pubescent, mostly dark brown to nearly
black in color. Antennae brown, the apical segment somewhat darkened.
Body beneath brown, usually tinged with ferrugineous. Legs brown, the
tips of femora and bases of tibiae, and the tarsi dark. Rostrum extending
slightly beyond the meso-metasternal suture. Rostral sulcus open behind.
Akin to T. scrupolosa Stal, but readily separated from it by
the longer and much less pilose antennae; the pubescence in the
discoidal area is almost entirely wanting. Twelve specimens.
Florida: Crescent City, September 7, 1898, Otto Heidemann Col-
lector. Jamaica: Mandeville, Kingston, January to April, 1908,
E. P. Van Duzee Collector. Type in my collection; paratypes
in the collections of E. P. Van Duzee, Cornell University (late
Heidemann Collection) and of the writer.


(Cryptothrips floridensis Watson.) *

The camphor thrips was first collected by Mr. W. O. Richtman,
on the camphor farm at Satsuma in November, 1912 (see An.
Rep. Fla. Ag. Exp. Sta. 1913, p. lxvii). Subsequent search
thruout Florida revealed its presence in many places, but by
no means in all those investigated. This discontinuous distri-
bution and our failure to find the insect on any plant except
camphor, which is an introduced plant, finally led us to the
opinion that it is an introduced pest, perhaps brought to us on
camphor. This opinion was strengthened by the receipt of a
single poor specimen of an adult and several larvae of apparently
this species collected on camphor in Ceylon (An. Rep. Fla. Ag.
Exp. Sta. 1915, p. lxxi).
The first evidence that pointed to an opposite conclusion was
gathered on a visit to the DuPont Camphor Farm at Waller last
July. The insect was not noticed in this plantation until spring
of this year and one of the first centers of infestation was near
a "bayhead" in an out-of-the-way section of the farm. This
pointed to the bayhead as a possible source of the insect. Ac-
cordingly the native vegetation in the bayhead was subjected to
a vigorous sweeping and a single adult of the camphor thrips
was captured. Altho this pointed strongly to the bayhead as
the home of the insect, there was a possibility that the thrips
caught there had strayed into the bayhead from neighboring
*Paper read before the Florida Entomological Society Sept. 29, 1919.


camphor. If the insect was native to the bayhead what was its
foodplant there? Those of you who are familiar with our bay-
heads know that the vegetation there is a bewildering mixture of
a large number of species of shrubs, herbs and grasses with no
apparent order or zonation. It was therefore difficult indeed
to determine the exact host plant. Because it belongs to the same
family as camphor we naturally suspected the bay itself. There
are two entirely unrelated genera of plants that are commonly
called "bays" in Florida. One is a certain small species of Mag-
nolia of the magnolia family and the other is Persea, or Tamala,
of the laurel family, the family to which camphor belongs. It
was, of course, the latter only that was suspected of possibly
being the host plant of the camphor thrips. However, a thorough
beating of this plant at Waller failed to reveal the presence of
the thrips. A fortnight's vacation spent at Daytona Beach af-
forded an opportunity to study the bay there, Tamala littoralis
being one of the most abundant trees on the island. The very
first tree investigated yielded many of the camphor thrips, both
adults and larvae. Further investigation showed that the thrips
was generally distributed thruout the island. It was found
on trees miles from any camphor and in isolated places to which
the opportunities of catching a ride must be few. On only a
few trees, however, was the infestation heavy. It has since been
found on the same species of bay at Orlando.
Following the discovery of this thrips on bays and its identi-
fication on structural grounds as Cryptothrips floridensis, live
thrips were taken to the laboratory and transferred to camphor.
Vice versa thrips collected from camphor were transferred to
bay. In both cases the insects fed with avidity on the new host.
They seemed to have no choice whatever as between camphor and
bay, provided the leaves or twigs were of an equal age. We
have not as yet had an opportunity to study their behavior in the
field where bays and comphor are growing side by side.
There can then, it would seem, be no doubt but that the native
bays of the genus Tamala are the native hosts of the camphor
thrips which is.a native insect that has spread to the camphor
wherever opportunity offered. Its uneven distribution over the
state and its absence from many camphor hedges and trees is to
be explained by the remoteness of the uninfested trees from
bays and lack of transportation facilities.
These developments lead to a reexamination of the specimen
from Ceylon, for if the insect is a native of Florida, feeding on


the wild bays, it would seem unlikely that identically the same
species should be found in Ceylon. Altho the Ceylon specimen
is undoubtedly a Cryptothrips and remarkably similar in size
and color to C. floridensis, a close examination reveals differ-
ences in the shape of the thorax and the antennal segments. The
Ceylon specimen is probably a distinct but closely related spe-
The injury inflicted on bay is similar to that on camphor but
less severe. There is the same destruction of the new terminal
growth but fewer and less severe bark lesions. The larvae seem
to feed more on the leaves and less on the bark than when attack-
ing camphor. Following the destruction of the terminal bud
the lateral buds develop freely, resulting in a sort of witch's
broom or "multiple bud" growth. The withered terminal shoots
cling to the tree longer than do those of camphor and form
retreats in which the thrips commonly hide. These dead twigs
are the most likely places in which to search for the insects.
Thus far the larvae have been found on only the shore bay,
Tamala littoralis, but trees of Tamala barbonia about Gaines-
ville show typical thrip injury. The avocado belongs to the
genus Persea to which genus the bays have been commonly
referred. Upon the discovery that the latter were the native
hosts of the thrips, some apprehension was felt lest the insects
might be able to feed also on avocadoes and ultimately perhaps
to invade the avocado orchards of the state. In the laboratory,
however, they have refused to feed on young growth of the
Mexican avocado.
The life history of the camphor thrips has not been worked
out in detail. A single generation was raised in May 1913. The
eggs hatched in eight or nine days and the larvae had become
adults by the 24th day.
Contrary to our previous experience we have lately observed
the insect to fly. The flight was, however, very short. That it
does not commonly fly far is indicated by the fact that camphor
trees less than a half mile from a center of infestation have
remained free for years. A hedge near the writer's home at
Gainesville is still uninfested, altho a colony of thrips has for
six years existed within a half mile and for the past year within
900 feet. This hedge borders an unused alley where opportu-
nities for transportation are few. Trees along the neighboring
street where traffic is heavy have become infested.
J. R. WATSON (Ag. Exp. Sta.).


Pupae.-The pupae (Fig. 20) resemble Culex, but are larger. They
remain as pupae two or three days.
Adults.-The adults are easily recognized. They have the legs and
abdomen conspicuously banded with white and the dorsum of the thorax
bears a lyre-shaped area of white, though this is sometimes inconspicuous.
They fly and bite only during the day.

The larvae of this species have been found in an old pot, tin cans, and
in pans in the laboratory.
The eggs are large, spined, and laid singly. The larvae are much like
Culex, but can soon be distinguished by their large size, being over one-half.
of an inch when full grown. They are cannibalistic and feed upon larvae
of Culex, Anopheles, and the smaller ones of their own species. (Berkley
1902.) The adult of P. ciliata is easily recognized by its large size and the
bands of erect scales on the legs. P. Floridense looks very much like
Stegomyia, but so far as I have observed, they fly and bite only at night.
Neither species are ordinarily troublesome here. No local breeding places
have been found.
(To be continued in Nos. 3 and 4. No. 3 will contain Mosquitoes and
Disease, Natural Enemies, and Preventives; No. 4, Part II, Traps for Mos-

Announcements of the marriage of Mr. A. C. Mason of the
U. S. Ent. Laboratory at Miami to Miss Mary McConchie, at
Paris, Ill., have been received.

Mr. C. A. Bennett has established his laboratory for the cam-
phor thrips work at Satsuma. With J. R. Watson of the Fla.
Exp. Station, who has been made collaborator in the Bureau on
this project, he has recently made a trip to Macclenny, Glen St.
Mary, and Monticello.

Mr. K. E. Bragdon is at present supervising the inauguration
of a general survey of the peninsular section of Florida for the
purpose of finding whether or not the sweet potato weevil has
become established at interior points,

Mr. W. R. Briggs has recently been appointed County Agent
for Manatee County, with headquarters at Bradentown.

Mr. A. C. Brown recently participated in the boll weevil in-
vestigations conducted by the State Plant Board in the northern
part of the state.


Mr. Clarence A. Bass, until recently in the navy, is at present
in Baltimore, recuperating from an operation. Upon his re-
covery he is expected to resume his position with the State
Plant Board.
Mr. Milledge M. Bass recently resigned from the position of
District Inspector for the State Plant Board to accept a position
as manager of a large citrus property belonging to the Standard
Growers' Exchange,' located near Fort Myers.
Mr. Eli K. Bynum has been granted a leave of absence of
several weeks by the State Plant Board, in order to attend to
personal business affairs at his home at Satillo, Miss.
Mr. Virgil Clark is now in western Florida making re-inspec-
tions of citrus properties formerly infected with citrus canker,
this work being done jointly by the State Plant Board and the
Bureau of Plant Industry, U. S. D. A.
Mr. Howard G. Carter recently resigned as District Inspector
for the State Plant Board. He will henceforth devote his time
and attention to his fruit-growing properties in southern Dade
Mr. E. F. DeBusk, County Agent of Orange County, has
announced his forthcoming resignation. It is understood that
he will engage in commercial work.
Mr. B. F. Floyd, Plant Physiologist of the University of Flor-
ida Experiment Station, has resigned for the purpose of entering
commercial life. He will have charge of the insecticide work of
the Wilson-Toomer Company.
Mr. Wm. Gomme is now County Agent of Polk County.
Mir. Chas. M. Hunt, Assistant Nursery Inspector for the State
Plant Board, is now located in the Nursery Inspector's office at
Mr. Neal E. Hainlin is now engaged in the citrus canker
re-survey work and is located in the northeastern portion of the
Mr. K. S. Lamb, formerly Asst. Quarantine Inspector with
the State Plant Board, is now occupying a position as traveling
salesman for the Loose-Wiles Biscuit Co.
Mr. Harold Mowry, Asst. Quarantine Inspector for the State
Plant Board, is now located at Key West.


Mrs. N. M. G. Prange, of Jacksonville, was one of the enthu-
siastic attendants at the recent Citrus Seminar at Gainesville.
Mr. Wilmon Newell, Plant Commissioner, attended confer-
ences, regarding the European corn borer, at Albany, N. Y., and
Boston, Mass., on August 28th and 29th. He afterwards visited
Riverton, N. J., and made a personal investigation of the Jap-
anese beetle infestation at that point.
Prof. S. I. Kuwana, Government Entomologist of Japan, re-
cently visited Florida. At Orlando he visited the Bureau of
Entomology Laboratory in charge of Mr. W. W. Others, at
Tampa he investigated the quarantine work of the State Plant
Board, and at Largo the citrus canker eradication work, after
which he spent two days at the University of Florida Experi-
ment Station and the State Plant Board offices at Gainesville.
Mr. L. Russell Warner, Asst. Quarantine Inspector for the
State Plant Board, is ill with typhoid fever at Key West. For-
tunately his condition is not considered as critical and hopes are
entertained for his steady recovery.
Mr. Frank Stirling installed and had charge of an exhibit for
the State Plant Board at the West Florida Fair, at Marianna,
October 28th to November 1st.
Mr. D. N. Reynolds is at present assisting the farmers of
western Florida and particularly those of Jackson and Liberty
Counties in dealing with the mosaic disease of sugar cane.
Mr. A. L. Swanson is heading a small party of inspectors
assigned by the Plant Commissioner to the task of determining
to what extent the mosaic cane disease may have become estab-
lished around Lake Okeechobee.
Dr. C. F. Hodge has accepted an appointment with the new
Extension Division of the University and is a most welcome
addition to our meetings.

STRATEGUS WANTED-Am making a special study of this
genus, of the Scarabeidae, and should be very glad 'to receive
Florida specimens, especially of the rarer species. Will ex-
change or pay cash. Address W. Knaus, McPherson, Kansas.


A small collection of thrips collected by Prof. A. Burr Black
and sent to the writer contains specimens of an apparently un-
described species.
Physothrips black, n. sp.
Y. General color brown, a slight tinge of orange on the thorax of some
Measurements: Total length 1 mm. Head length .09 mm., breadth
0.15 mm.; prothorax: length 0.13 mm., breadth (including coxae) 0.17 mm.;
mesothorax: breadth 0.24 mm.; metathorax: breadth 0.21 mm.; abdomen:
breadth 0.26 mm. Total length on' antennae 0.22 mm. Segment 1, 25;
2, 33; 3, 37; 4, 36.5; 5, 32.5; 6, 42; 7, 7; 8, 14 microns.
Head considerably wider than long; cheeks slightly convex, sparsely
hairy; vertex with several very distinct cross striations; no large post-
ocular bristles, but a row of 8 small bristles extends across the vertex
behind the eyes; a long spine in front of each posterior ocellus. Eyes
large bright red by reflected light, occupying over half the length of the
head and two-thirds the breadth, sparsely pilose, facets large. Ocelli very
large, posterior margins of the posterior pair even with and near the
posterior margins of the eyes, bordered on the inner sides by heavy pig-
mented crescents. Anterior cellus directed partly forward, bordered poste-
riorly by a large pigmented area. Mouth-bone long and pointed, reaching
nearly or quite across the prosternum. Antennae 8-segmented, 1 and 2
almost as dark as the head, 2 often darker than 1; 3 and the base of 4
light-brownish yellow, remainder light brown. Spines and sense cones short
and colorless but some of the latter heavy.
Prothorax squarish, sides slightly convex and diverging posteriorly.
Posterior angles rounded and provided with a pair of heavy bristles. The
anterior angles bear only very short bristles. Mesothorax with very convex
sides, no large bristles. Metathorax with sides nearly straight and parallel.
Legs rather long, except for the lighter tarsi, nearly concolorous with the
body. Fore legs often lighter than the others. Fore wings light brown;
veins bearing prominent bristles; 11 or 12 on the fore vein, 8 or 9 near the
base, 2 in the center and one near the apex; 11 or 12 on the posterior vein,
none on the base; fringing hairs stout but rather short and sparse. Hind
wings colorless.
Abdomen elliptical, tapering acutely to the base. Spines short on the
anterior segments and those on the posterior less than 2/ the greatest
width of the abdomen.
6 Smaller than the female. Some specimens are considerably lighter in
color, especially the antennae and legs. The latter are sometimes yellow.
Abdomen widest at the base; well rounded posteriorly. The last seg-
ment bears several pairs of strong but short bristles.
Measurements: Total body length .87 mm.; head: length .086, breadth
.134 mm.; prothorax: length .107 mm., breadth .155 mm.; mesothorax
.202 mm.; abdomen: width at base .156 mm.; antennae: total length .187;
segment 1, 18; 2, 30; 3, 34; 4, 34; 5, 28; 6, 39; 7, 6; 8, 12.5 microns.
Described from six females and 12 males collected from California poppy
and dandelion at Corvallis, Oreg.


Aug. 4 (Adjourned meeting). Meeting was called to order by
Vice President Merrill at 5 p. m. with the following members
present: Geo. B. Merrill, P. W. Fattig, J. R. Watson, Dr. J. H.
Montgomery, J. C. Goodwin, C. M. Hunt, Frank Stirling, O. T.
Stone, P. H. Rolfs, and E. W. Berger. Visitors present were
Prof. W. L. Floyd, Dr. C. L. Crow, W. L. Goette, Dr. C. F. Hodge
and several students of the summer school. The following new
members were elected: Miss M. F. Hill, teacher, Trenton; W. J.
Schubert, of Armour and Co., Jacksonville; E. F. DeBusk,
County Agent, Orlando; Dr. C. F. Hodge, instructor in summer
school; and W. L. Goette, teacher, Eustis.
The address of the evening by Dr. Hodge on "Housefly Con-
trol" was listened to attentively. Dr. Hodge exhibited and
explained his fly trap and gave much valuable data on the habits
of flies. Flies will usually not travel much over 500 yards if
food is available within that area. They may travel even a
mile in search of food, and even further over water. The
waterworks of Cleveland, Ohio, situated 11/4, 5, and 6 miles from
shore were one summer overrun with flies. On the furthest
crib the biting stable fly was most abundant and troublesome.
On the nearer cribs some blue-bottles were present.
One trap is sufficient for a radius of 100 yards provided all
other food is kept out of reach of the flies. One afternoon is
sufficient to capture all the flies in such an area.
Dr. Hodge also explained how he got the idea that it was
possible to "trap a vacuum" of flies. He had been paying boys
to collect flies for feeding young quail. One day while dining
with a friend on an open porch of his residence the absence
of flies was commented upon and it occurred to him that the
boys had caught all the flies. The trap was the outcome of this
observation and finally led to his successful attempts at cleaning
up the flies in whole cities.
E. W. BERGER, Acting Sec'y.

Sept. 29. Meeting called to order by Pres. O'Byrne at 5 p. m.,
with the following members present: E. W. Berger, K. E. Brag-
don, H. S. Davis, G. M. Hunt, G. B. Merrill, Wilmon Newell, F.
M. O'Byrne, Frank Stirling, and J. R. Watson. Visitors present
were C. A. Weigel, and C. A. Bennett.
The paper of the evening was by J. R. Watson on the Origin


and Hosts of the Camphor Thrips. .After an extended dis-
cussion of the paper Mr. C. A. Weigel, who has been conducting
a general survey of the thrips situation in Florida for the U. S.
Bureau of Entomology, outlined the plans for the camphor
thrips campaign about to be undertaken by the Bureau under an
appropriation of $5000. Following this Mr. C. A. Bennett,
who is to have direct charge of the control work, made a few
remarks. Meeting adjourned at 6:30.
H. S. DAVIS, Sec'y.

Some damage is being done by pumpkin bugs and cotton
stainers (Nezara viridula and Dysdercus saturellus) to citrus
and other crops. After the adult pumpkin bugs have gotten
onto the fruit the only known remedy is to collect them in large
nets. The cotton stainers may be killed with a good strong
oil emulsion or soap solution sprayed on the trees. Mr. Mosnett
has found that spoiled avocadoes cut in half make excellent
traps for them. While congregated on the avocado they may be
sprayed with kerosene.





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