WINTER NUMBER 101 
eg. Wings only slightly narrowed 
in the middle; head length 
more than 1.5 times. the 
breadth; fore tarsi unarmed. 
Cryptothrips Uczel. 
ge. Wings distinctly narrowed in 
the middle; head length less 
than 1.5 times the breadth; 
fore tarsi with a tooth. 
Haplothrips (in part). 
ff. One pair of cephalic bristles (not 
including the post-ocular) much 
elongated. 
g. Post-ocellar bristles elongated; 
anterior margin of prothorax 
semicircular, emarginate and 
greatly thickened. 
Dichaetothrips Hood 714. 
gg. Pair of bristles laterad of me- 
dian ocellus elongated; ante- 
rior margin of prothorax nor- 
Mal erees See ee Diceratothrips. 
ee. Mouth cone acute at the tip; wings con- 
siderably narrowed in the middle, like a 
sole. 
f. Head nearly twice as long as wide; 
mouth cone reaching nearly across 
prosternum. ........ Leptothrips Hood. 
ff. Head only a little longer than broad. 
g. Mouth cone reaching only to 
middle of prosternum. 
Zygothrips Uzel. 
gg. Mouth cone reaching across 
prosternum. ........ Phyllothrips. 
dd. Wings of equal width thruout. 
e. Cheeks with a few very small warts, each 
of which bears a small spine. 
f. Cheeks nearly straight. 
Gynaikothrips. 
ff. Cheeks arched. 
g. Post-ocular bristles long and 
consepicuous; fore femors of 
3 with two teeth near apex. 
Hoplandrothrips. 
gg. Post-ocular spines lacking. 
Phloeothrips Haliday. 
ee. Cheeks without such warts. 
