Cockroaches, Locusts, Grasshoppers, and Crickets 141 



sometimes wanting). The hind tibiae are normally red (sometimes yellow- 

 ish), hence the name, although these red hind legs are common to many 

 other locust species. The lesser migratory locust, M. atlanis (Fig. 168), 

 is a species of about the same size and appearance which sometimes 

 appears in great swarms and does much injury to crops. The largest 

 species of the genus is M. difjerentialis (Fig. i6g), over an inch and a half long, 

 with brownish-yellow body, fore wings without spots, and hind wings clear. 

 It is common in the Southwest, where, in company with M. bivittatus (Fig. 

 170), nearly as large but readily distinguished by the pair of longitudinal 



Fig. 176. Fig. 177. Fig. 178. ■ 



Fig. 176. — The short -winged green locust, Dichromorpha viridis, female, (.\fter Lugger; 



natural size indicated by line.) 

 Fig. 177. — The spotted-winged locust, Orphula pelidiim. (After Lugger; natural size 



of male 16-19 mm., of female, 20-24 mm.) 

 Fig. 178. — The Carolina locust, Dissosteira Carolina, female. (After Lugger; natural 



size indicated by line.) 



pale-yellowish stripes extending from the head across the thorax and along the 

 folded wing-covers nearly to their tips, it often becomes sufficiently abundant 

 to do serious injury. These two species are always to be found commonly 

 in western Kansas, and bivittatus ranges far to the north, being one 

 of Minnesota's destructive species. 



Among the other genera of the .-subfamily Acridiinse Schistocerca is con- 

 spicuous because of the large size and wide distribution of its species. The 

 American locust, 5. americana (Fig. 171), measures three inches from head 

 to tips of tegmina, with reddish-brown body and a longitudinal yellowish 

 strip extending along the head, thorax, and closed tegmina nearly to their 



