792 BULLETIN UNITED STATES GEOLOGICAL SUEVEY. 



Fam. GEYLLID^. 

 Gryllus sp. 



The larva of a black cricket was taken beneath stones and rubbish 

 near Colorado Springs. A similar form occurred near Denver and in 

 the entrance to the Grand Caiion of the Arkansas. Only one adult 

 specimen was met with anywhere, and the young specimens were not 

 common in either of the above mentioned places. 



CEcanthus niveus Serv. 



One specimen was seen at Denver ; but the species was comparatively 

 common around Colorado City and in the valley of the Arkansas River. 



Fam. LOCUSTID^. 

 CeutJiophilus sp. 



A form closely related to G. maculatus Harris was found beneath a 

 decaying pine log and chips high up the mountain-side, beyond Beaver 

 Brook, August 7. Young specimens of a similar species were detected 

 beneath stones on the hill side near Colorado Springs. 



Phylloptera sp. 



The young nymphs of this genus were not uncommon among the 

 grape-vines and rank weeds in the valley of the Arkansas and near 

 Colorado City. 



Orchelimuni sp. 



A fine large species occurred among the grass and weeds in the val- 

 ley of the Arkansas River, a mile or more east of Caiion City. 



Xiphidiuni sp. 



A species similar to X. fasciatum Serv. was common in Beaver Brook 

 Gulch, also in Denver and beyond that city, on the farms, and in the 

 entrance to the Grand Canon of the Arkansas. 



Fam. ACRIDID^. 



Stenobothrtis ketus new sp. 



Ground-color above bright apple-green, including the upper part of 

 the face ; cheeks and labrum paler green, or tinged with rosy-testaceous. 

 Antennte longer than the head and prothorax united, dusky greenish, 

 paler at base, flattened, tapering at tip. Wing-covers deeper green, 

 narrow, the costal margin curved, a little expanded beyond the base; 

 the discoidal area wide, having numerous quadrate areoles, and with 

 about four black spots, the two intermediate of which are round and 

 • larger; costal and cubital fields dusky, the second with a series of about 

 four irregular black dots; posterior field brown, with the bases of the 

 thick veins black and the margin green. Head thick, convex on the 

 sides, the sutures between the gense and front black, and a triangular 

 black spot behind each eye; the margins of the fastigium brown, and 

 the ridge above the eye fuscous. Face oblique, but curved, the vertex 



