[23] 



NORTH AMERICAN COLEOPTERA. 179 



width at the eyes; surface broadly couvex, impunctate; occipital fovere 

 rather lurge, very deep, but slightly elongate, joined by the usual strongly 

 arcuate, impressed groove; antenual tuberculations rather prominent, with a 

 few small, widely scattered punctures; antennas slender, slightly longer than 

 the head and pi othorax together, club rather strong, rapidly increasing in 

 width from the ninth joint which is slightly wider than long, tenth strongly 

 transverse, much wider than the ninth, slightly obliquely truncate at the 

 apex, eleventh twice as wide as the ninth, truncate at base, ovoidal. ob- 

 liquely acuminate, rather acutely pointed, as long as the three preceding 

 together. Prothorax nearly as in monticola; sides less acutely rounded 

 before the middle, slightly less strongly narrowed toward base; apex slightly 

 broader; basal tubercles more symmetrically pointed and more prominent; 

 median groove narrow, rather deeply impressed, continuing from the basal 

 fovea nearly to the apicd margin. Elytra at base as wide as the base of the 

 prouotum, at apex more than twire as wide; sides evenly, very strongly 

 arcuate; disk strongly convex, distinctly wider than long, rather coarsely, 

 very sparsely and feebly punctate; sutural strife deeply impressed, nearly 

 straight; discal very short, very broadly and rouudly impressed, gradually 

 evanescent at a little more than one-third the length from the base. Abdo- 

 men as wide as and much longer than the elytra, convex; first visible seg- 

 ment with three large equidistant, densely-pubescent foveas along the basal 

 margin; carime completely obsolete. Legs rather long, very slender; fem- 

 ora rather abruptly, strongly swollen beyond the middle; posterior tibiae 

 scaicely .perceptibly bent. Length 1.9-2.1 mm. 



California; (Humboldt Co. 4). 



Described from the male, in which the apical fovea is 

 large, slightly wider than long and rather feebly impressed; 

 the anterior edge is truncate and very broadly, feebly sinu- 

 ate toward the middle. In the female the elytra are slightly 

 shorter. 



Easily recognizable by the very long, well marked, me- 

 dian pronotal sulcation, by the short elytra, and absence of 

 basal carime. 



Bryaxis. 



This genus, in the broad sense indicated by LeConte, 

 (Tr. Am. Ent. Soc. VIII. p. 181), contains a rather hetero- 

 geneous assemblage of species, although the various groups 

 are clearly indicated. It will be noticed that there are two 

 classes of fove;e upon which the subdivisions are based — 



