ORTHOPTERA. 



Ill 



mology with M. bivittatus, a closely allied species, which occurs in 

 the interior. 



M. differ entidlis. This species is slight- 

 ly larger than the preceding ; it lacks the 

 prominent yellow stripes, and is confined 

 to the central portion of the United States 

 (Fig. 100). 



5. Brachystola. This genus is repre- 

 sented by the " Lubber Grasshopper" or 

 Clumsy Locust of the plains, B. mdgna. 

 This insect is confined to the central 

 portion of North America, and it can be 

 readily recognized by the accompanying 

 figure (Fig. 101). 



Sub-Family V. 



This sub-family is closely related to the 

 Acrididae ; and the members of it resemble 

 that sub-family in having the prosternum 

 armed. The Opomalinae are distinguished 

 by the vertex extending horizontally in 

 front of the eyes, by the strongly receding 

 front, and by the short fore and middle femora. The antennae are 

 usually more or less flattened ; and the terminal spine of the outer 

 row of the posterior tibiae is never wanting. 



Several genera of this sub-family are represented in this country. 

 The species are more common in the South and West than in the 



FIG. 101. Brachystola mngna. 

 (From Riley.) 



FIG. 102. Leptysma marginicolle. 



Northeast. Fig. 102 represents Leptysma marginicolle ; this species 

 occurs in Florida, and will serve as an illustration of the sub-family. 



Sub-Family VI. 



The Tettigince includes small locusts of very unusual form. The 

 most striking character of the sub-family is the shape of the pro- 



*OpomalInse, Opomala: ops (00$}, appearance; omalos (o^nrAoS), plane. 

 f Tettiglna, Tgttix: tettix (rrrz|), the Greek name for these insects. 



