AMERICAN COLEOPTERA. 153 



This species has been made by EichhoiF. {Berl. Enf. Zeltsrlis. 1868, 



p. 147), the type of a new genus Dolnrgus ; the funiculus is described 



as 4-jointed, but after repeated examination, I am unable to perceive 



more than three joints the proportions of which I have endeavored to 



describe above. 



CRYPHALUS Er. 



I have combined under this name all those species which h;ive the 

 club of the antennae large, compressed, and transversely annulated on 

 both surfaces. It consequently corresponds to Dr. Zimmerraann's 

 genus Crt/ptiirgus which name cannot be retained for it as the typical 

 European species, unknown to our author, is of a quite distinct type. 



With the enlarged definition of Cn/phahcs adopted by me, it will 

 contain species of varied form, and diifering in the number of joints 

 of the funiculus of the antennae : the funiculus is however always 

 short, and the joints, after the first, closely connected b )th with each 

 other and with the base of the club. The species are numerous and 

 may be grouped as follows : 



A. — Funiculus 1-jointed (base of club not articulated). 



This group corresponds with Corthylus, Er., and may be divided 

 into two subgroups: I, Corthi/Iomhnus Ferrari, corresponding with 

 the first division of Dr. Zimmermann's Crypt iinjiiA^ having the club 

 of the antennae fringed, and the outer surface of the front tibiai trans- 

 versely corrugated. II, Corthyhis proper, with the club still larger, 

 not fringed, and the front tibiae armed at the outer edge with a few 

 small teeth. 



To the first subgroup belong the following species : 



*" Posterior declivity of elytra flattened, feebly margined behind: 



1. C. fasciatus. (Ante, p. 143.) 



2. C. scutellaris Lee. Report R. R. Expl. to Pacifie, xi. Insects, 59. 

 California. 



«:•:■ Posterior declivity of elytra concave, acutely margined behind: 



3. C. cavus. — Black, moderately shining, elytra brown, darker towards the 

 tips, antennae yellowish, feet brown; head convex, strongly not densely punc- 

 tured; prothorax finely roughened near the tip, nearly smooth behind, about 

 one-third longer than wide, jjarallel on the sides, obtusely rounded in front; 

 elytra very finely punctulate and rugose, posterior declivity deeply excavated 

 and hairy, with its margin strongly elevated for more than one-half the ex- 

 tent, ending in an acute cusp, above which, continuing the outline of the de- 

 clivity and nearer the suture are three other small denticulations ; the suture 

 along the declivity is elevated. Long. 3"5 mm. 



One specimen of this very distinct species was given me by Dr. G-. 

 H. Horn, as collected in the coast region of California, south of San 

 Francisco. 



