REVTSTON OP ELEODIINT BLAISDELL. 261 



Yalvula (Plate 1, fig. 18). — Dorsal plate oblong, with the internal 

 border strongly reflexed in apical half, external three-fourths grad- 

 ually reflexed and outwardly oblique; surface glabrous, very slightly 

 concave, strongly so along the reflexed internal border, very sparsely 

 and finely punctate, seta^ short and not conspicuous; external border 

 nearl}' straight or slightly arcuate; internal margin more or less 

 sinuous; apical margin subtruncate, angle broadly and evenly 

 rounded, Avith a few rather short and not very conspicuous setse. 

 Apex small and about as long as the appendage, finely setose and 

 without tuft. 



Apjyendage somewhat flattened, subconical, and more or less con- 

 cealed by the apical margin of the dorsal plate; finely setose and 

 without a conspicuous tuft. 



Supe'rior pudendal membrane attaining the middle of the dorsal 

 plate. 



Basal prominences usually not well developed. 



Ventrolateral surfaces. — Body not inflated nor strongly convex, 

 slightly concave before the apex and laterally; surface smooth, with 

 few fine punctures and setffi about the fossa ; apices finely setose. 

 Submarginal groove fine and normal under the slightly prominent 

 external margin of the dorsal jjlate. Internal margins of the valves 

 contiguous in basal third. (lenital fissure narrowly fusiform, with 

 the inferior pudendal membrane closing its basal half. 



Hahitat. — California (eastern San Diego County; Los Angeles 

 County ; Kern County ; Coso Valley ; Panamint Valley, and Death 

 Valley, April; Needles; Fresno; Tulare Count}^; Palm Springs; 

 Merced County ; Mono County ; Amedee. Lassen County, July, ele- 

 vation, 4,200 feet, H. F. Wickham ; Fort Tejon; Argus Mountains) ; 

 Arizona (Tacna, April, Plubbard and Schwarz; Fort Yuma; Pres- 

 cott; Martinez (Congress Junction) ; Bill Williams Fork, F. H. 

 Snow). Lower California (coll. Calif. Acad. Sciences). 



Number of specimens studied, 112. 



Type in the LeConte collection. 



Type-locality. — California (gold disc label) in the desert near the 

 Colorado River. 



SaVtoit type-characters.-— Thorax finely and scarcely densely punc- 

 tate; sides rounded, and narrowed posteriorly; basal angles obtuse. 

 Elytra convex, apex slightly attenuate, punctures more or less dis- 

 tinctly seriately placed. Femora always with a long and acute tooth 

 beneath ( LeConte ) . 



Diagnostic characters. — Q.uickl}^ recognized from all other species 

 north of Mexico — except militai^is and fetnorata — by having all of the 

 femora armed. 



Armata differs from the above two species mainly in its larger 

 size and in having the elytra less attenuate, also, rather more sud- 



