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Florida Buggist 
Official Organ of the Florida Entomological Society 
VO: I WINTER NUMBER NOZ3 
DECEMBER, 1918 
(Printed in February, 1919) 
NEW THYSANOPTERA FROM FLORIDA—IV. 
J. R. WATSON 
58. Trichothrips brevitubus n. sp. 
Measurements: Head, length 0.187 mm., width 0.2 mm.; prothorax, 
length 0.115 mm., width 0.3 mm.; abdomen, width 0.4 mm.; tube, length 0.1 
mm., width at base 0.064 mm., at the apex 0.032 mm.; total body length 1.17 
mm. Antennae: segment 1, 24; 2, 52; 3, 64; 4, 63; 5, 52; 6, 48; 7, 46; 8, 26 
microns; total length 0. 39 mm. 
Color, including legs and tube, brown, head and abdomen very dark brown. 
Antennae entirely bright yellow except segment 8, which is ight brown. 
Head nearly square in general outline, a little wider than long, sides 
convex, an acute projection between the bases of the antennae. The only 
prominent spine is the post-ocular which is about 26 microns long. Like 
all the other spines on the body it is dark brown and ends in a small colorless 
knob. Eyes rather small, about nine facets showing in lateral profile which 
occupies about two thirds of the margin of the head, not protruding, black. 
Ocelli inconspicuous, posterior pair situated far forward opposite the 
anterior .2 of the eyes whose margins they touch, widely separated. The 
anterior one points forward, color very dark. Mouth cone long and tapering, 
reaching a trifle beyond the posterior margin of the prothorax. Antennae 
twice as long as the head, 8-segmented, spines and sense cones rather short, 
especially on the basal segments, all colorless and inconspicuous. 
Prothorax broad and short, approaching a semi-circular outline, sides 
convex and sharply diverging posteriorly, a long (81 microns) heavy spine 
near each posterior angle, each angle provided with a single shorter spine. 
Pterthorax with sides convex and slightly converging posteriorly, without 
prominent spines. Legs moderately long and slender, without prominent 
spines. Wings rather short, membrane not reaching the end of the abdomen, 
fringed with long hairs that reach little beyond the end of the tube. 
Abdomen wide and short, about a third longer than broad, bearing a few 
dark spines which become long and heavy posteriorly. Tube but little 
more than half as long as the head. The longest of the terminal bristles 
about equal to the length of the tube. 
Described from a single female brot to the author by the janitor of the 
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