CoIeo}jterological Notices, VI. 539 



Head three-fourths as wide as the prothorax, constricted at base, the ej'es 

 small and very prominent; frontal impressions feeble and widely separated ; 

 epistoma very short, with a thin pale margin ; labrum pale, short, transversely 

 rounded ; antenna? slender, f eeljly incrassate, subequal in length to the head 

 and prothorax, the outer joints rather longer than wide, sixth distinctly 

 smaller than the fifth or seventh. Prothorax scarcely one-third wider than 

 long, the sides feeljly convergent from base to apex, broadly arcuate, becoming- 

 sinuate toward base and apex, the broad subapical constriction extending en- 

 tirely across the disk; basal angles acute, prominent and everted, the apical 

 rather blunt; apex arcuato-truncate, the base with a broad arcuate lobe; disk 

 subcylindrically convex, very declivous at the sides and with an elongate 

 foveiform impression on the median line near the base; lateral edges not ser- 

 rulate and with a very decumbent and dense fringe. Elytra three-fifths 

 longer than wide, one-half wider than the prothorax, the sides parallel and 

 nearly straight; apex evenly rounded; humeri tumid. Under surface more 

 finely and less densely pubescent, the hairs less closely decumbent. Length 

 3.0 mm. ; width 1.0 mm. 



Nevada (Reno). Mr. Wickham. 



The type is a male, having the fifth ventral short and trans- 

 A'ersely truncate and the genital segment sinuato-truncate at tip 

 find broadl3^ impressed at the middle of the disk. The tibioe have 

 a. terminal fringe of short spinules internally and externally, but 

 I am unable to detect the usual two larger spurs. 



I have before me a female, also from Nevada, which ma}- be re- 

 ferred to this species for the time being, although the diflerences 

 are extraordinary. The sculpture of the head and pronotum is 

 much coarser and the pubescence of the elytra finer and twice as 

 sparse. The pronotum has a strong impressed line parallel to 

 each lateral edge and at some distance from it, not attaining base 

 or apex and of which there is no trace in the male, and the sub- 

 basal fovea of that sex is wantino-. 



ADASYTES n. gen. 



Although not diftering much from certain forms of Tricho- 

 <3hrous in general habitus, the type of this genus is in reality more 

 ^losel}' allied to Listrus, the anterior tibia; being completelj- de- 

 void of short stout spinules; these are replaced b^- a few long 

 slender black and anteriorly inclined bristles. From Listrus, 

 however, it ditfers completely in facies and in the even and non- 

 serrulate edges of the prothorax. The hypomera have a large 

 rounded and deep impression near the inner edge anteriorly, 

 equally developed on each side in the type and probably a normal 



