242 NORTH AMERICAN OEDIPODINAE (ORTHOPTERA: ACRIDIDAE) 



wing slightly distad of the middle and following the peripheral margin to as 

 much as half-way to the body, spur broad, heavy, extending more than half- 

 way to the base, costal margin free from spur and of the disk color; distal 

 portion hyaline with few scattered brown areas near margin and along certain 

 of the veins. Limbs with the usual barring of the group, the caudal femora 

 frequently with much hoary white, rarely suffused, on dark areas, with castor 

 gray; caudal tibiae olive buff to bluish glaucous, mottled with brownish proxi- 

 mad, dorsal surface in glaucous type darkened to russian blue, spines black- 

 tipped on bone browTi, bases of same of tibial color. In the infrequent castor 

 gray suffused individuals the caudal tibiae are much mottled with this color. 



In addition to the type and allotype we have before us eight 

 males and three females taken at Milford, Utah, September 5, 

 1909, by Rehn and Hebard. We also have for study one male 

 and three females from Cima, San Bernardino County, California, 

 taken August 12, 1907, by Hebard, and one female from the f pot- 

 hills of the Bird Spring Mountains, San Bernardino County, 

 California, taken August 11, 1907, also by Hebard. The Cima 

 and Bird Spring Mountains material was previously recorded by 

 us as Mestobregma ruhripenne,^^ to which the present species is 

 closely related, but quite distinct. The Milford series we here 

 designate as paratypic. 



In the series examined, we find some little variation in the 

 Cima male, which has the fastigio-facial angle, in profile, more 

 evident and angulate than in the others; the eyes and costa, 

 however, are typical. Of the Milford series two of the males are 

 red-winged, the remainder, of both sexes, are yellow-winged. 

 One Cima female is red-winged, the remainder and the Bird 

 Spring Mountains individual are yellow-winged. The species was 

 scarce at Milford, occurring on sage covered ridges at 5000 feet 

 and on relatively bare slopes, with scattered sage and yellow- 

 flowered bushes, at 4900 to 5000 feet elevation. 



Mestobregma terricolori^ new species (Plate XXVI, figs. 13, 14 and 15; 



plate XXVIII, figs. 16 and 17.) 



This interesting species is more nearly related to D. impexum, 

 here described, than to any other of the genus. It forms with 

 impexum a section of the platiei group of the genus, and can be 

 distinguished from the component races of M. platiei by the less 



'^ Vide supra. 



1' Meaning earth-colored, in relation to the general tone of the coloration of 

 the insect in rejiose. 



