210 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL.XX. 



less infuscated, the upper face indistinctly biinaculate with fuscous, 

 the whole geniculation excepting the lower lobe beyond its base 

 blackish; hind tibiae glaucous (pale yellowish in alcoholic specimens), 

 the spines black to their base, or excepting the extreme base, ten to 

 eleven, rarely twelve, in number in the outer series. Extremity of 

 male abdomen very feebly clavate, scarcely recurved, the supraaual 

 plate triangular, about equally long and broad, the sides straight, the 

 tip angulate; furcula consisting of a pair of subapproximate slight 

 and equal fingers, bluntly tipped, hardly more than a quarter the 

 length of the supraanal plate; cerci very slender, compressed, rapidly 

 narrowing at extreme base, beyond equal, slightly and broadly sulcate 

 exteriorly, directed backward and a little inward, tapering and bluntly 

 rounded at tip, scarcely reaching the tip of the supraaual plate; sub- 

 genital plate truncato-conical, much broader than long, incurved at 

 base, the lateral and apical margins in one plane, entire. 



Length of body, male, 17.5 mm., female, 21 mm.; antennae, male, 

 10.5 mm., female, 8.5 mm.; tegmina, male, 4 mm., female, 4.5 mm.; 

 hind femora, male, 12.5 mm., female, 13 mm. 



Four males, 9 females. Arizona (U.S.N.M. Eiley collection; L. 

 Bruner) ; San Carlos, Gila County, Arizona, Wheeler's Exp. (U.S.N.M. 

 Kiley collection); Fort Whipple, Yavapai County, Arizona, E. Pal- 

 mer; Fort Buchanan, Pima County, Arizona, E. Palmer; Fort Grant, 

 Graham County, Arizona (U.S.N.M. Eiley collection). 



See the remarks on this species under Melanoplus humphreysii. The 

 specimen from Cape St. Lucas which I referred ! to this species does 

 not belong to it, but probably to Melanoplus nitidus. 



10. INDIGENS SEEIES. 



In this group, consisting of only a single species of medium size, the 

 prozona of the male is very longitudinal and the interspace between 

 the mesosternal lobes of the same sex only slightly longer than broad. 

 The antennae of the male are almost as long as the hind femora. The 

 tegmina are abbreviate, about as long as the pronotum, subelliptical 

 with rounded apex. The hind tibiae are greenish and have ten to 

 twelve spines in the outer series. 



The extremity of the male abdomen is hardly clavate and the supra- 

 anal plate triangular with distinct median sulcus and mesially notched 

 lateral margins; the furcula consists of a small pair of tapering fingers; 

 the cerci are large and broad, almost equally broad throughout, and 

 apically rounded, nearly straight; the subgenital plate is broad and 

 short, the apical margin elevated to a blunt tubercle. 



The single species occurs in Idaho. 



. Boat. Soc. Nat. Hist., XX, p. 85. 



