1909.] 



NATURAL SCIENCES OF PHILADELPHIA. 



1 15 



three 9 , July 13; Deming. two 6\ four 9 , July 18; Florida Mountains, 

 two d\ two 9 , July 19; Aden, twenty-six d\ thirty-eight 9 , July 21; 

 Silver City, nineteen d\ seven 9, July 20. At El Paso, Alamogordo 

 and at the foot of the Florida Mountains it was taken from the bare 

 ground in greasewood (Covillea) areas, while in Dry Canyon, in the 

 Franklin and Florida Mountains, and at Silver City it was taken from 

 canyon and hill slopes usually covered with low vegetation. At Aden 

 the species frequented a variety of habitats, being taken on a rocky 

 hillside, in grass prairie land and from areas of dry grass in sand, being 

 most abundant in the latter situation, while at Deming it was taken 

 on the rabbit-weed and mesquite plain. 



STIRAPLEURA 11 Scudder. 

 Stirapleura pusilla Scudder. 



A series of thirty males and thirteen females are referred to this 

 species, which seems to present quite a little variation in minor struc- 

 tural characters and size and to a considerable extent in color. Five 

 males and four females were taken at Silver City, July 20, on rough 

 slopes, the remainder of the series, twenty-five males and nine females, 

 being from Aden, July 21, where the species was found in all the three 

 types of surroundings examined, but was noted in greatest numbers 

 in grass prairie. The Silver City specimens are smaller than the Aden 

 individuals, although both series average larger than the original 

 measurements. The proportions of an average pair from each locality 

 are as follows : 



Length of body, 

 Length of pronotum 

 Length of tegmen, . 

 Length of caudal 

 femur, 



10 



11.2 



12.5 



14 



AGENEOTETTIX McNeill. 

 Ageneotettix deorum (Scudder). 



At Aden, July 21, this species was found in grassy prairie land, on 

 a rocky hillside and in a patch of dry grass along the railroad track, 

 a series of thirteen males, one female and seven nymphs being taken. 



11 Stirapleura mescalero Rehn (Proc. Acad. Nat. Sci. Phila., 1902, p. 719) is 

 seen on re-examination of the type and comparison with material now in hand 

 to be Psoloessa texana Scudder. The original reference to Stirapleura was caused 

 by the degree of dorsal visibility of the lateral foveolse, a character which appears 

 to us to be almost worthless for separating the two genera, depending as it does 

 on the angle from which the head is viewed. 



10 



