48 



discoidea, throughout the Southern States ; and CE. imradoxa, from Utah 

 norlli lo Montana. 



]}oi,pedon is confined to the plains east of the Rocky Mountains from 

 Wyoming south. 



Brachypeplu,<< is found from Southern Dakota to Mexico. 



Pezotettix obesa lias been found only at high points, 7-10,000 feet above 

 the sea, in Southern Montana and near Yellowstone Lake, Wyoming ; P. picta, 

 along the east base of the Rocky Mountains in Colorado south to New 

 Mexico ; P. glacialis and manca are confined to the extreme northeast ; P. 

 borchii to California. 



Platypliyma is scarcely generically distinct from Pezotettix, and should 

 be merged into that genus. P. montana^ found at high altitudes in Southern 

 Montana, is the only species known in the United States, but other species 

 have been obtained in Mexico. 



Ommatolampis viridis, our only species of this genus, ranges from South- 

 east Nebraska to Southern Colorado. 



Caloptenus is another genus that is represented in all portions of the 

 earth. _ Although found on the great ^ilains of the West, it appears, as a general 

 rule, to seek points of rankest vegetation. To this genus belongs our destruc- 

 tive migratory species of the West, C. spretus, which does more injury to 

 farmers' crops than all the rest of the tixmily combined. I have traced it 

 north and south from Lake Winnipeg to Texas, and east and west from the. 

 borders of Missouri and Iowa to Nevada. It does not appear to pass west of 

 the Sierra Nevada range, l)ut more evidence on this point is needed before it 

 can be positively stated. I am inclined to think it is not abundant in Ai'izona 

 or New Mexico, but am not positive on this point. I have met with some 

 stray specimens in Southern Illinois. C. femur-rubrmn is one of the most 

 common grasshoppers in the States; is found from Canada to the Gulf of 

 Mexico, and from the Atlantic to the Rocky Mountains, and Walker says it is 

 met with on the Pacific coast ; but I very much question the correctness of 

 this statement; in fact, I have some doubt whether the Rocky Mountain 

 variety belongs to this species. C. bivittatus, I believe, inhabits all parts of the 

 United States except California ; and, although preserving the marks of 

 identity, varies greatly in size and general color. 



Acridium, as a generic form, which, though well marked, is difficult to 

 describe, appears to be southern, though represented in the North. I am not 



