NO. 1310. NORTH AMERICA X TIIYSANOPTERA— HINDS. 138 



SYNOPSIS OF TPIRIPID.E. 



, fAntennfc with eight segments 2 



I Antenna' with seven segment::; " 11 



n (Body with markedly reticulated surface Ifflio{}ir!ji.<< (p. 168) 



iBody without reticulate surface 8 



/Alidomen clothed with fine hairs and liaving a silky luster. ,St'ricothrlj>.<t (p. 141) 



iBody without clothing of fine hairs 4 



jLast two segments of the antenna longer than the sixth. . Rnphidoilirips (p. 158) 



\Last two segments shorter than sixth 5 



[Terminal segment of abdomen with a pair of extremely stout, short spines 



5 < near the tip above IJinolliripii (p. 138) 



^Terminal segment without unusually stout spines 6 



I Antennae with second segment drawn out into an acute process on outer 

 angle Cliirothrip^ ( ii. 183) 

 Second segment of antenna' normally symmetrical 7 



y /Ocelli and wings wanting Ajil'moOirips ( p. 166) 



k)celli and wings present 8 



Q /With spines at hind angles of prothorax 9 



UVithout spines at hind angles of prothorax lii(iji]iut]irlp>! (p. 160) 



q /With two long spines at each hind angle of prothorax 10 



iWith one long spine at each hind angle of prothorax Pi<eudolJiri]is (p. 146) 



10 /^^'ithout a long spine at middle of each side of jirothorax Enthrlps (p. 147) 



I With a long spine at middle of each side of prothorax Scolollirips (p. 157) 



-,-, /Fore wings broad and without front fringe Part]ieno1hrip>> (p. 175) 



iFore wings slender, spines on outer half fewer than on basal... Tlirips (]). 178) 



Genus CHIROTHRIPS Haliday. 



Bod}-^ thickened. Head very small and in front of the eyes drawn 

 out into a three-cornered process upon which the antennas are situated. 

 Ocelli present in the females and located very far back; wanting- in 

 the males. Antenna? eight segmented, the second segment ending in 

 a blunt prominence at the outer angle. Maxillary palpi three seg- 

 mented. Prothorax nearly twice as long as the head, and trapezoidal 

 in form, being about twice as broad at the hind edge as at the fore 

 edge. Two prominent spines present at the hind angles or wanting 

 in some species. Legs short; the fore j)air extremely thickened, so 

 that the tibia? are short and broad and the tarsi small, Wings long 

 and very slender; fore wing with two veins upon which there stand a 

 few small spines; front fringe well developed. Males wingless. 



SYNOPSIS OF SPECIES. 



( With two moderately long spines at each hind angle manicatus (p. 134) 



\ Without long spines at the hind angles 2 



f Abdomen light yellow ohc'^K.'^ (p. 187) 



I Abdomen light brown crassus (p. 136) 



