34 FURTHER RESEARCHES ON NORTH AMERICAN ACRIDIID^. 



Arkansas: Ashdown (juv. 3, 4, 5) ; Blue Mountain Station (juv. 3, 4) ; 

 Dardanelle (juv. 4) ; DeQueen (juv. 5) ; Eagleton (juv. 5) ; Fayette- 

 ville (juv. 3); Magazine Mountain; Mena (juv. 5); Ola; Rich Moun- 

 tain; Rich Mountain Station; Winslow. 



Indian Territory: Caddo; Haileyville; Howe (juv. 5); South McAlester; 

 Wilburton (juv. 5). 



Texas: Bonita; (Denison, juv. 3); Wichita Falls. 



Oklahoma: Cache; Mountain Park (juv. 3); Shawnee (juv. 5). 



This species is one of the most ubiquitous locusts of the eastern 

 half of the continent, inhabiting a great variety of environments, 

 chiefly campestral and on soil containing a moderate amount of mois- 

 ture. It is one of the few species which has apparently extended its 

 range down the Mississippi River along the levees, being common on 

 the higher ground near the river and on embankments along canals. 



Encoptolophus patVttS Scudder. 

 Indian Territory: Caddo. 



Texas: Amarillo; Clarendon; Denison; Quanah; Wichita Falls. 

 Oklahoma: Snyder. 



A locally common species frequenting the dark, chocolate-colored 

 humus of the exposed shores of dried-up ponds and ditches, and not 

 infrequently found on cultivated fields. It is so inconspicuously col- 

 ored and so nearly silent in flight as readily to escape notice either 

 when on the wing or when at rest. 



Encoptolophus costalis Scudder. 



Texas: Amarillo; Clarendon; Myra; Quanah. 



L,ocally common among the mesquite grass, varying much in 

 coloration, specimens being occasionally light yellowish green, the 

 markings contrasting strongly with the ground color. The green 

 form bears a strong resemblance to Phlibostroma quadrimaculatum. 



Hippiscus COtallipes Haldeman. 

 Texas: Clarendon; Quanah. 

 Oklahoma: Cache; Mountain Park; Snyder. 



A large, handsome, and wary species, not uncommon locally 

 among mesquite grass and along roadsides. 



Hippiscus immaculatus Morse. 



Hippiscus immaculatus. Psyche, xui, 119, 1906. 



Texas: Clarendon. One male. 



"The specimen [described] is the size of rugosus. The pronotum 

 is less rugose, smoother in outline and in surface, a little narrower ; 

 the hind margin is obtuse-angulate, its apex rounded and its sides 



