12 MISC. PUBLICATION 6 9 8, U. S. DEPT. OF AGRICULTURE 



KEY TO THE SPECIES OF POLYCAON 



1. Antenna 11 -segmented; second and third tarsal segments cylindrical, 



not securiform 2 



Antenna 10-segmented; second and third tarsal segments securiform, 

 flattened granulatus Van Dyke, p. 12. 



2. Third segment of antenna distinctly shorter than fourth; color 



black stoutii (LeConte), p. 13. 



Third segment of antenna as long as the fourth; color reddish 

 brown punctatus LeConte, p. 14. 



Polycaon granulatus Van Dyke 



Poiycaon granulatus Van Dyke, 1923, Brooklyn Ent. Soc. Bui. 18: 43-45; Lesne, 

 1925, Encyc. Ent. (ser. B), Coleopt. 1: 30-31; 1938, in Junk (pub.), Coleopt. 

 Cat., pt. 161, p. 27. 



Male. — Elongate, subcylindrical, opaque, black, except antennae, tar- 

 sal claws, and lateral margins of elytra, which are reddish brown. 



Head including eyes distinctly wider than pronotum. convex in front, 

 finely, densely granulose. sparsely clothed with short, erect hairs, with 

 a few long, erect, black hairs intermixed; clypcus broadly depressed 

 in front at middle, truncate in front : eyes very large, globose, strongly 

 projecting, each one-third as wide as width of head between them. 

 Antenna 10-segmentecl, clothed with a few long, erect hairs; third 

 segment subequal in length to fourth ; last three segments forming a 

 loose club, together longer than rest of segments united. 



Pronotum subequal in length and width, widest near apical fourth, 

 broadly, transversely depressed behind anterior margin, narrowly, 

 transversely flattened along base; sides broadly rounded anteriorly, 

 more strongly converging posteriorly, sinuate near base; surface 

 densely, finely granulose, rather densely clothed with long, erect, 

 black hairs, with a few shorter, recumbent hairs on median part. 



Elytra much wider than pronotum, arcuately declivous toward 

 apices ; sides nearly parallel, separately incised and bidentate at apices ; 

 disk strongly convex ; surface densely, finely granulose, rather densely 

 clothed with short, recumbent, black hairs, with a few long, erect, black 

 hairs intermixed. 



Body beneath finely, densely granulose or rugose, rather densely 

 clothed with moderately long, recumbent and semierect, whitish hairs, 

 with a few long, erect hairs intermixed. Anterior tibia robust, 

 expanded toward apex, dentate on exterior margin, without basal 

 excavation ; second and third tarsal segments elongate, securiform. 



Female. — Differs from the male in having the tips of the elytra 

 conjointly rounded. 



Length 8-10 mm., width 2.5-3.5 mm. 



Type locality. — Carmel, Monterey County, Calif. 



Type. — In the Van Dyke Collection in the California Academy of 

 Sciences. 



Van Dyke described this species from three males and one female, all 

 collected at the type locality on March 8 and September 3-19, 1916, by 

 L. S. Slevin. 



Through the kindness of E. Gorton Linsley the writer was able to 

 study two specimens of the type series. This species seems to connect 

 Polycaon and Melalgus, having characters common to both genera, 

 but the writer prefers to retain both genera until more specimens are 

 available for study. P. granulatus agrees with Polycaon in having 



