38 FURTHER RESEARCHES ON NORTH AMERICAN ACRIDIID^. 



Trachyrhachis fuscifrons Stal. 



Texas: Clarendon; Denison; Quanah; Wichita Falls. 

 Oklahoma: Cache; Mountain Park; Shawnee. 



Trachyrhachis obliterata Bruner ( ?). 



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

 Oklahoma: Cache; Mountain Park. 



Trachyrhachis fciowa Thomas. 

 Texas: Amarillo. 

 Oklahoma: Mountain Park. 



The following statements, together with those on page 12, will 

 bring out the geographical character of the variation presented. 



Amarillo : 39 specimens. 38 kiowa> i obliterata. 



Clarendon : 5 specimens. 2 obliterata; 3 fuscifrons ', i with very 

 narrow wing-band. 



Quanah: 44 specimens. 20 thomasi; 15 fuscifrons grading per- 

 fectly into thomasi; 7 obliterata , grading toward fuscifrons in showing 

 traces of wing-band; 2 with disk hyaline and wing-band obsolescent 

 or of medium width. 



Wichita Falls : 23 specimens. 4 obliterata; i with disk hyaline 

 and wing-band broad, nearly complete; 16 fuscifrons grading toward 

 thomasi, chiefly with wing-band broad in posterior part, but broken 

 behind radial shoot, which is often faint. 



Mountain Park : 6 specimens. 2 kiowa; 3 obliterata ; i fuscifrons 

 with very faint wing-band. 



Shawnee : i specimen. Like last. 



Cache: 3 specimens. 2 obliterata; i fuscifrons with pallid disk. 



Base of Mt. Sheridan : i thomasi ', varying toward fuscifrons. 



Caddo, i; Haileyville, 19; Howe, 25; Van Buren, 9; Fayette- 

 ville, 30, all thomasi. 



Specimens of Trachyrhachis are very common and generally dis- 

 tributed on drier grounds of prairies and plains, especially in the 

 vicinity of bare spots, ant-fields, etc., among the mesquite and other 

 low grasses. 



Mctator pardalinus Saussure. 

 Texas: Amarillo. 

 One male. 



Psinidia fcncstralis Serville. 



Mississippi: Biloxi; Gulf port; Hattiesburg; Nugent. 

 Texas: Bonita; Clarendon. 



An ammophilous species, widely distributed but very local, found 

 only upon areas of loose sand. 



