REVISION" OF ELEODIINI BLAISDELL. 327 



longer on apical margin, inipunctate in basal fourth. Membrane not 

 setose across the bottom of the sinus, the latter narrowly triangular. 



Female. — Genital segment elongately triangular, superior surface 

 jDlane. 



Valvula (Plate 1, fig. 9). — Dorsal plate elongately oblong; surface 

 plane, glabrous, obsoletely punctate and sparsely setose; sides more 

 or less feebly arcuate and subparallel ; apical margin feebly arcuate 

 or subtruncate, scarcely rounded internally over the apical lobe, 

 angle evenly rounded. Apex rather long and slender, subacute and 

 finely setose, with a few long seta? at tip ; external apical lobe not in 

 the least evident. 



Afpendage short mammilliform, with about two to four long setae 

 at tip. Fossa in basal and external surface of apex. 



Su/perior pudendal memhrane reaching to the apical fourth of the 

 dorsal plate and longitudinally rugulose. 



Basal pi'ominences not evident, evenly rounded at base. 



Ventrolateral surfaces (Plate 1, fig. 10). — Body quite triangular 

 and evenly convex from side to side, glabrous, surface lines straight as 

 viewed longitudinally, very feebly punctate and setose about the apex. 



Submarginal groove moderate beneath the slightly explanate ex- 

 ternal border of the dorsal plate and attaining the fossa. Internal 

 margins of the valves contiguous in about basal three-fourths; genital 

 fissure very narrow in apical fourth; the inferior pudendal mem- 

 brane is not visible. 



Habitat. — California (Owens Valley, Dr. George Horn; Bodie, 

 elevation 8,475 feet, July, Wickham; Lundy, 7,000-8,000 feet, July) ; 

 Nevada (western, Mr. Gabb; Verdi, April, Blaisdell). 



Number of specimens studied, 125. 



Type in the Horn collection. 



Type-locality. — Owens Valley, California ; collector, George Horn. 



Salient type-characters. — Opaque. Head rather coarsely punc- 

 tured. Thorax one-third broader than long, very coarsely punc- 

 tured, becoming granular at the sides; sides stronglj^ rounded, mar- 

 gin entire, basal angles moderately prominent, rectangular. Elytra 

 elongate oval, moderately convex, sides moderately rounded; basal 

 angles obtuse; surface rather densely and irregularly covered with 

 small, rounded, shining tubercles, arising from a very opaque base 

 (Horn). ^ 



Diagnostic characters. — The salient type characters differentiate 

 tenehrosa from all other species of the subgenus — in fact it is quite 

 unique among its congeners by not having the elytra broader at the 

 widest part than the thorax. 



Occasionally specimens are observed with the sides of the pro- 

 notum evenly rounded from base to apex and in this character resem- 

 ble snowii, but here the surface is more or less shining and the 



