INSECTS AFFECTING GRAINS, GRASSES, ETC. 99 



smaller than its western relative and somewhat resembles the 

 red-legged locust both in size and appearance. The species 

 is very widely distributed, occurring from Florida to the Arctic 

 Circle east of the Mississippi, and on the Pacific slope north of 

 the fortieth parallel to the Yukon. The habits and life history 

 of the species are in all essentials practically the same as the 

 former species, except that they have no particular breeding- 

 grounds. Injuries by this grasshopper were first noticed in 

 1748, almost seventy-five years before the first record of the 

 Rocky Mountain locust, and since then it has done more 

 or less serious damage in some part of thn territory inhabited 



every few years. 



Non-Migratory Locusts 



There are several species of locusts which, though lacking 

 the migratory habit, and thus being more easily controlled, 

 often become so numerous as to do 

 serious damage over limited areas. 

 Both as regards the regions inhab- 

 ited, and its habits, life history, the 



FIG. 75. Red - legged locust 

 common Red-legged Locust (Melan- (Melanpplus femur -rub rum 



oplus femur-rubrum Har.) hardly dif- Harr -)- ( After Rile y-) 

 fers from the last species, and is often found in company with 

 it. It is non-migratory, however, and though the damage it 

 does is thus entirely local, it is often of considerable importance. 



Records of locust plagues in 

 California date back as far as 

 1722. Many of them were 

 doubtless due to the California 

 Devastating Locust (Melano- 

 plus devastator Scud.), and in 

 the last invasion of 1885 this 

 species outnumbered all others 

 seven to one. Resembling the 

 last two species in size and 

 markings, the habits and life 

 FIG. 76. The pellucid locust (Camnula history of this species are also 

 peUucidaScud.). (After Emerton.) supposed to be similar to them, 

 though they have not as yet been thoroughly studied. 



Together with the last species the Pellucid Locust (Camnula 

 pellucida Scud.) has been largely responsible for the losses occa- 



