256 REPORT UNITED STATES ENTOMOLOGICAL COMMISSION. 



Fig. 9.— Green-stkiped Locust:— a, larva; &, perfect insect. 

 (After Eilej.) 



Fig. 10.— Stexobothrus maculipen- 



ms.—a, mature insect 

 larva. (Emerton del.) 



b, pupa ; c, 



be distill guisbed from the dreaded Eocky Mountain pest. Like so many 

 other species of its famil^^, it occurs in two well-marked varieties, one in 



which, in addition to the 

 stripe on the front wings, 

 the whole body and hind 

 thighs, above, are pea- 

 green; the other, in which 

 this color gives way to pale- 

 brown. In both varieties 

 the hind wings are smoky, with the basal third greenish." 



Different species of the genus Stenol)othrus are also quite often mis- 

 taken for spretus in winter and early spring. They are tolerably common 



in the Western country where s])retus oc- 

 curs, and theyhibernate in the partly-grown 

 condition. We figure the young and 

 winged form of a species {8. maculipennis, 

 Scudd.) that in the unwinged state was 

 quite generally supposed to be the young 

 of sprehis in Minnesota, last February. 



*' The species of the genus Tettix also 

 hibernate in the half-grown and sometimes 

 in the full-grown condition, and are fre- 

 quently supposed to be the young of spretus. These insects are very 

 active, and are at once distinguished by the small head, great breadth 

 across the middle of the prothorax, which extends to a tapering 

 point to or beyond the tip of the abdomen; by the front of the breast 

 forming a projection like a stock-cravat, into which to receive 

 the lower part of the head, and by the short, rudimentary, 

 scale-like front wings. They fly with a buzzing noise like a 

 flesh-fly. Our most common species (Tettix granulata, Scud- 

 der. Fig. 11) may be called the Grranulated Grouse-locust. 

 Like the other species, it is very variable in color and orna- 

 mentation, the prevailing hue being dark-brown beneath and 

 paler above. A well-marked variety has a small, pale spot on 

 the rudimentary front wings, and a larger conspicuous one on 

 top of the hind thighs." 

 Even insects belonging to a different order are not infrequently the 

 cause of unnecessary alarm. In the spring of 1875 the meadows were 

 reported as being destroyed around Champaign and Jacksonville, III., 

 by what was supposed to be the young of spretus^ but which proved 

 upon examination by competent persons to be little Jassoid leaf-hop- 

 pers, allied to the common grape-leaf hoppers — insects belonging to a 

 different order [Hemiptera) from that which includes the locusts [Or- 

 thoptera). They were, indeed, grass-hojypers^ in the sense of hopping about 

 among the grass, but they were not the so-called grasshoppers (locusts) 



