1925] 
New N eotropical Thysanoptera 
51 
0.8 as long as 3 and somewhat stouter; 5 about 0.7 as long as 4 
and of the same width, oval, pedicellate; 6 equal in length to 5 
but more slender, of the same form but inverted, the pedicel 
being apical and delimited by an oblique transverse line; 7 
shorter, very slender; sense cones simple. Pro thorax three- 
fourths as long as head. Abdomen strongly and sharply cons- 
tricted beyond base of segment 2, which is the longest in entire 
abdomen; 10 tubular, about 0.7 as wide at base as long, divided 
above by a longitudinal suture. 
Grenada, Guadeloupe and Trinidad; C. B. Williams; on 
cacao, an unidentified creeper and fustic ( Chlorophora tinctoria). 
Readily known by the seven-segmented antennae with 
simple sense cones, the non-produced vertex, and the short 
prothorax, which is angulate at the sides. 
Astrothrips constrictus sp. nov_ 
Female (macropterous).— Length about 1.1 mm. Dorsal 
surface deeply reticulate. Color yellowish brown, paler at 
middle of pterothorax and in last three abdominal segments; 
segment 10 of abdomen nearly black in apical third; antennae 
yellow, with segments 1 and 2 darkened with brown, and apical 
three-fifths of segment 5 and all of segment 6 unevenly darkened 
with blackish brown; femora brown; tibiae brown, narrowly 
yellow at either end; tarsi yellow; fore wings brown at base 
(scale darker) and with brown blotches of varying lengths scat- 
tered along veins, these blotches forming more or less distinct 
transverse bands at basal third and apical fourth; ring vein at 
extreme tip of wing dark brown. Vertex produced, overhanging 
the insertion of antennae. Antennae six-segmented; segment 1 
short, subcylindrical, about as broad as long; 2 broadest in 
entire antenna, goblet-shaped, pedicellate; 3 slender, vasiform, 
pedicellate, fully five times as long as wide; 4 somewhat more 
than half as long as 3 and slightly stouter, subfusiform, pedi- 
cellate, with an oblique, transverse line beyond middle; 6 about 
one-third as long as 5, slender; sense cones slender, those on 
segments 3 and 4 bifurcate beyond base. Abdomen strongly 
and sharply constricted beyond base of segment 2, which is the 
