1909.] NATURAL SCIENCES OF PHILADELPHIA. 139 



The only previous record of this species in New Mexico is of its occur- 

 rence in Johnson's Basin, Socorro County, where it was taken, June 22, 

 by Townsend. The record of its occurrence at Alamogordo, New 

 Mexico, made by Rehn, 9 should be corrected, as a re-examination 

 of the individual there recorded shows it to be the very closely allied 

 C. cinerea. 



Cordillacris cinerea (Brunei-). 



Two females, one taken at Aden, July 21, on grassy prairie, and the 

 other from prickly pear (Opuntia sp.) growing on the greasewood covered 

 mesa northeast of El Paso, July 10, are referred to this species. These 

 specimens are very close to C. occipitalis, but seem to be separable 

 from the specimens of the latter by the more protuberant eyes, the 

 narrower fastigium and the more constricted interocular space. How- 

 ever, there is a great amount of variation along these lines in specimens 

 of undoubted occipitalis, and an examination of the type material of the 

 species may show no valid grounds for retaining cinerea as distinct from 

 occipitalis. The color character given by Bruner 10 to separate the two 

 species does not appear to be of value, as specimens of occipitalis 

 have the caudal tibiae various shades of testaceous as well as "in part 

 red or reddish." This form has been recorded with some query as to 

 the species from sandhills near Mesilla, New Mexico, June 27-30 

 and Sierra Blanca, Texas, June 26, while material from Alamogordo, 

 New Mexico, April 9, belongs to this type. 

 Cordillacris apache n. sp. 



Types : c? and 9 ; Silver City, Grant County, New Mexico. Juty 20, 

 1907. (Hebard and Rehn.) [Hebard Collection.] 



Related to C. crenulata (Bruner) and C. pima Rehn, differing from 

 the former in the narrower ventral portion of the head, more retreating 

 facial line, narrower interspace between the eyes, narrower tegmina and 

 slightly more elongate caudal limbs; from C. pima it differs in the 

 shorter caudal limbs, in the more constricted lateral carinas of the 

 pronotum and in the rectangulate angle of the fastigium in the female 

 sex. 



In determining the series representing this species it was found 

 absolutely necessary to ascertain what true C. crenulata was, the origi- 

 nal description of the latter species hardly being explicit enough to 

 place the name on the northern form (Montana to Colorado) or the new 

 one, the difficulty being further augmented by the fact that Bruner 



9 Proc. Acad. Nat. Sci. Phila., 1902, p. 718. 

 10 Biol. Cent. Amer., Orth., II, p. 70. 



