228 STUDIES IN AMERICAN TETTIGONIIDAE (oRTHOPTERA) 



-longipes 



vitt icoH is 



cinereus 

 fasciatus fasciatus 

 fasciatus vicinus 

 — ictus 



spinosus 



nsularis 



iodes 



r—ins 



graci n imus 

 angust if rons 



brevipennis 

 - resacensis 



— unicoloK 





occidental is 



. hygrophilus 



■ at ictomerus 



-aigialus 



I — equatorialis 

 -1- saltator 

 Lborelli 



, truncatus . , 



I r versicolor 



I ochrotelus 



■ nigropleurum 



attenuatus 



nigropleuroides 



spartinae 



-strictoides 

 leptopterus 



The numbers given above designate the six subgenera known 

 from America, the letters indicate the American groups of the 

 very large subgenus Xiphidion. Of these, A, B, C and D form 

 more or less of a unit, while E contains two species which are 

 nearly intermediate in position between this and the unit formed 

 by the groups, G, H and I, all three of which latter groups are, 

 however, somewhat more widely separated one from the other 

 than are the first four groups. Group F is distinctive. Com- 

 paring the male cerci of the American species of the other sub- 

 genera with those of the species constituting groups of the 

 subgenus Xiphidion, we find that C. (Dicellura) allardi agrees best 

 with group A; the two species C. (Opeastylus) longipes and ritti- 

 collis are distinctive; C. {Perissacanthiis) strictoides agrees best 

 with group I; C. (Aphauropus) leptopterus, being known only 

 from the female sex, can not in this respect be definitely asso- 

 ciated, though the general structure of the insect suggests that 

 the male cerci may agree best with group F; while C. (Anar- 

 thropus) saltans is distinctive. 



Material Exaynincd. — We have studied the material of the 

 genus from North America north of Mexico, nearly 3800 speci- 

 mens, and, in addition to a series of nearly 100 specimens prc^ 



