ORTHOPTERA 



257 



necfcicut and Iowa. It can be recognized by Figure 283, which rep- 

 i-esents it natural size. This locust sometimes assumes the migratory 

 ' - injurious to agriculture. 



habit, and is sometimes 



The lubber grasshopper, Erachystola magna. — This 

 clumsy species in which the wings are vestigial (Fig. 

 confined to the central portion of North America. 



Leptysma marginicollis. — 

 In most of the spur-throated 

 locusts the face is nearly ver- 

 tical; but in a few species it 

 is very oblique. This species 

 is a good illustration of this 

 type (Fig. 285); it is foimd in 

 the Southern States east of the 

 Mississippi River. 



is a large, 

 284); it is 



Fig. 28^.— Lcplysma marrinicollis. 



Subfamily CEDIPODIN^ 



The Bard-winged Locusts 



In this subfamily the prosternum is without a distinct tubercle; 

 the head is rounded at the union of the vertex and the front; and the 

 f'-ont is perpendicular or nearly so. In most of our species the hind 

 wings are in part black, and a portion of them yellow or red; this 

 gives them a banded appearance. There are many representatives 

 of this subfamily in our fauna: the following are some of the more 

 common ones. 



The clouded locust, Encoptolophus sordidus. — This species (Fig. 

 286) is very common in the eastern United States during the autumn. 



It abounds in meadows and pas- 

 tures, and attracts attention by 

 the crackling somid made by the 

 males during flight. It is of a 

 dirty brown color, mottled with 

 spots of a darker shade. The 

 length of the body of the male is 1 9- 

 -Encoptolophus sordidus. 22 mm.; of the female, 24-32 mm. 



The northern green-striped locust, Chortophaga viridifascidta. — 

 This is a. very common species in the United States and Canada east 

 of the Rocky Moim tains. There are two well-marked varieties, 

 .'n one. the typical form, the head, thorax, and femora are 

 green, and there is a broad green stripe on each fore wing, extend- 



Fig. 286. 



