794 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



AcrolopJiita Mrtipes Say. 



Inhabits the hilly country west of Colorado Springs. It was only 

 found singly, and at remote intervals, in places where the grass was 

 moderately thick and tall, August 16. 



Trop ido lophus formosus S ay . 



On the plains, in the tall grass, near Bijou, August 19. It was 

 seen only one at a time, and at remote intervals, a few rods from the 

 Bijou Creek. 



(Edipoda Carolina Linn. 



Extends across the continent, from the Atlantic coast to the foot-hills 

 near the Rocky Mountains. It was not frequently seen on the great 

 treeless plains, except near the water-courses, or where vegetation was 

 luxuriant. At Denver, and all along the railroad as far as Caiion City, 

 it was often to be seen iiying in the air. Near Colorado Springs, it was 

 common everywhere, and a single specimen was seen in the entrance 

 to Clear Creek CaQon. 



(Edipoda earlingiana Thomas. 



The black base of the wings of this species makes it quite conspicu- 

 ous when flying. It is very wild, and found singly in the vicinity of 

 Colorado Springs, August 16. 



Arpliia carinata Scudder. 



Found singly at Colorado Springs, and westward to the Garden of 

 the Gods, August 12 to 16. It occurs in single specimens at remote 

 intervals. 



Trimerotropis cequalis Say. 



Common in most parts of Eastern Colorado, on the plains and foot- 

 hills, as also in Clear Creek Canon, and in the gulches near Manitoii, 

 August 6 to -18. 



Psinidia eucerata Harris. 



Exceedingly common south of Colorado City and in the vicinity of 

 Caiion City. It is variable in colors and markings, just as we find it to 

 be in Maryland and New Jersey. Specimens found on the white sands 

 are very pale-colored, almost white, with wings varying from pale yel- 

 low to pale red-lead. Those of the dark soils and loams are dark-col- 

 ored, fuscous or grayish brown, with darker mottlings on the tegmina, 

 and with deep-red wings. August 10 to 17. 



Near the caiion of the Arkansas, an allied species occurred, with more 

 prominent eyes and somewhat shorter antennaB, but having the same 

 peculiarities of coloring as the preceding. It is probably undescribed. 



Circotettix undulata Thomas. 



Somewhat uncommon at Colorado Springs and near Canon City, 

 August 10 to 17. 



