1912.] NATUKAL SCIENCES OF PHILADELPHIA. 123 



Ceuthophilus arid us (p. 57). 



Described from a unique male; Grand Junction, Colorado, Novem- 

 ber 17, [1902]. 



Ageneotettix occidentalis (p. 58). 



Described from an unspecified number of specimens from Colorado 

 west of the main range. 



Single type here designated: <f ; [Glenwood Springs], Colorado, 

 September [15, 1903]. 



Encoptolophus coloradensis (p. 58). 



Described from one male and two females from a single locality. 



Single type here designated: unique cf ; Fort Collins, Colorado^ 

 [August 31, 1898]; [L. Bruner]. 



Trimerotropis inconspicua (p. 59). 



Based on an unspecified number of individuals from four localities. 

 Single type here designated: cf ; Palisade, Colorado, July [8, 1901]. 



xEOLOPLUS MINOR (p. 60). 



Based on a series of both sexes from a single locality. 



Single type here designated: c? ; Delta, Colorado, July 13, 1901. 



Hesperotettix gillettei (p. 61). 



Based on an unspecified number of specimens from four localities. 



Single type here designated: cf ; Rifle, Colorado, July 25, [1900]; 

 (specimen has. wings one-half as long as abdomen). 



Hesperotettix coloradensis (p. 61). 



Based on a pair from different localities. 



Single type here designated: unique <? : Durango, Colorado, 

 August 7, [1899]. 



Melanoplus sanguineus (p. 63). 



Based on a series of both sexes from two localities. 



Single type here designated: c? ; Lamar, Colorado, [September. 

 10, 1898]. 



Melanoplus tristis (p. 64). 



* 



Based on three males and five females from three localities. • 

 Single type here designated: c? ; Durango, Colorado, August 

 [3, 1900]. 



