796 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



few days in a box at the hotel in Colorado Springs, and similar to my 

 experience with Phrynosoma cornutum, kept in like manner. Two indi- 

 viduals of the latter, taken on the red soil near Manitou, were rust-red, 

 but upon keeping them in a box of gray sand they became pale, and 

 never returned to their original color. 



Caloptenvs hivittatus Say. 

 Common near Colorado Springs and in the valley of the Arkansas. 



Caloptenus spretus Thomas. 



Eastern Colorado, in many places ; Denver, Clear Creek Canon, Colo- 

 rado Springs, Caiion City, and near Pueblo. Quite variable in color and 

 structure. 



Pesotettix dodgei Thomas. 

 On the mountainsides in Clear Creek Canon, August 6. 



BracJiystola magna Scudder. 



Very common west of Colorado Springs, and near Manitou, and at 

 Bijou, August 12 to 19. Both styles of color occurred together, and 

 sometimes both were united sexually. They vary very much in length 

 and thickness. 



Batracliidea sp. 

 Common at Denver and near CaiiouCity, August 5 to 11. 



The Ortho2)tera enumerated here are, I am sure, but a tithe of the 

 great catalogue of forms which are distributed throughout the plains 

 and mountains of Colorado. Wherever vegetation was growing, the 

 numbers of kinds set in motion by the sweeping of my net filled me 

 with surprise. My time was too limited to permit me to secure them, 

 and a rich harvest in this field may yet be secured by the industrious 

 collector who remains long enough in that interesting country. 



