448 ARTICULATES I INSECTS. 



cases they move in swarms so great as to darken the sky, 

 and the places where they alight at once become desti- 

 tute of a green leaf or a blade of grass. Many of them 

 produce a stridulating noise by rubbing their thighs 

 against their wing-covers. 



The Genus Chlocaltis has the hind legs long and slen- 

 der, and wings extremely short. The species are gener- 

 ally less than one inch long. 



The Genus Stenobothrus contains the most common 

 so-called Grasshoppers. 



The Genus Tragoccphala contains the Goat-headed Lo- 

 custs, which have the antennae shorter than the thorax, 

 and slightly thickened towards the end ; face oblique. 



The Genus Caloptcnus contains the Red-legged Locust 

 and its immediate allies. 



The Red-legged Locust, C. fcmiir-rubrum, Burm., is 

 about an inch long, grizzled with dingy olive and brown, 

 and the hindmost shanks and feet blood-red, with black 

 spines. The Yellow-striped Locust, C. bivittatns, Uhler, 

 is about an inch long, dull green or orange, with a yellow- 

 ish line on each side from the forehead to the tips of the 

 wing-covers; the hindmost shanks and feet blood-red ; the 

 spines tipped with black. 



The Genus Acrydium embraces the largest members 

 of the family, including the celebrated Migratory Locusts 

 of the East. Some tropical species are four inches long. 



The Genus (Edipoda contains the most common large 

 species of the United States. 



The Carolina Locust, (E. Carolina, Burm., is about one 

 inch and a half long, pale yellowish-brown, the under 

 wings black with a broad yellow hind margin. 



The Coral-winged Locust, (E. pJiccnicoptcra, Germ., is 

 about one inch and a half long, and is light brown spotted 

 with dark brown on the wing-covers, and the wings are 

 coral-red with an external dusky border. 



