1927] 
N ew N eotropical Thysanoptera 
245 
fore wings, length 0.720 mm., width at middle 0.041 mm., near 
base 0.076 mm.; average length of bristles near middle of wing 
0. 020 mm.; abdomen, greatest width 0.293 mm. 
Antennal segments: 1 2 3 4 5 6 
Length 0) 24 40 73 43 59 28 
Width (ju) 26 31 16 19 20 5 
Total length of antenna 0.27 mm. 
Trinidad: C. B. Williams; on creepers, bushes, and a leaf 
of Arum Lily. 
The characters italicized in the description separate it from 
constrictus , the only New World species with which it agreesun 
the possession of six-segmented antennae and a divided mesoscu- 
tum. 
Eurythrips cinctus sp. nov. 
Female, forma macroptera. — Length about 1. 16 mm. Color 
yellowish brown, with transparent red subhypodermal pigmenta- 
tion, sides of head and all of thorax and apical abdominal seg- 
ments darker, the base of abdomen ( especially segments 2 and 2) 
decidedly paler and almost free of red pigmentation, giving the 
insect a distinct yellowish band at middle; antennoe nearly uni- 
form blackish brown, somewhat paler in basal portion of segment 
1, apical portion of 2, and pedicel of 3; femora brown, shading to 
lemon yellow beyond middle of tibiae; fore wings pale brown, 
decidedly darker at base. Head nearly 1.2 times as long as 
greatest width; ocelli rather widely separated, nearly touching 
margins of eyes, the interval between posterior o celli about 0.54 that 
between eyes; postocular bristles about 0.4 as long as head, 
pointed or very nearly so; postocellar bristles very minute, 
about attaining posterior margins of posterior ocelli; mouth 
cone broadly rounded, somewhat surpassing middle of proster- 
num; prothorax with anterior marginal bristles minute, all 
others long, pale, and very nearly pointed; fore tarsus with a 
small, claw-like, somewhat forwardly-directed tooth arising from 
the inner distal angle of the first tarsal segment; fore wings with- 
out accessory hairs at tip and with the three subbasal bristles 
short, slightly dilated apically. 
