52 
Psyche 
[February 
longest in the entire abdomen; 10 strongly constricted at basal 
fourth, widened beyond, and narrowed again at apex, divided 
above by a longitudinal suture. 
Trinidad; C. B. Williams; on Lantana sp. 
Recognizable at once by the basal constriction of the tenth 
abdominal segment and the six-segmented antennae with their 
Y-shaped sense cones. 
Goremothrips gen. nov. 
(K opeya, a broom; Opajy, a wood worm.) 
Body and all appendages very slender, and all bristles of 
monstrous size, hooked and pinnatifid apically. Head with two 
pairs of such bristles, one interocellar and the other postocellar; 
prothorax with two at each of its four angles. Wings very narrow; 
median vein of fore wing fused with costa, the strengthened 
anterior margin armed with about fifteen of the usual tremendous 
bristles disposed in two series, one inclined forward and the 
other backward; fringing hairs weak and sparse. Segment 9 of 
abdomen with two pairs of enlarged bristles, segment 10 with 
one pair. 
Genotype : Coremothrips pallidus sp. nov. 
A striking genus, of undoubted affinities with Scolothrips t 
but far more extreme than even that bizarre form in the de- 
velopment of the bristles of the body and fore wings. 
Coremothrips pallidus sp. nov. 
Female (macropterous) .^Length about 0.9 mm. Color 
uniform, pale yellowish white. 
Trinidad, Panama, and St. Vincent; C. B. Williams; on 
leaves of cacao and avocado pear. 
Plesiothrips octarthrus sp. nov. 
Female (macropterous). — Length about 0.9 mm. Head, 
prothorax and abdomen brown, the latter darker posteriorly; 
pterothorax pale brownish yellow; legs pale yellow; antennae 
