258 CALIFORNIA ACADEMY OF SCIENCES. 



which are fringed with hairs, and the terminal joint which 

 is sparsely pubescent over the entire surface. The scape 

 is rather short and robust, distinctly shorter than the fun- 

 icle and is not received in transverse grooves in front of 

 the eyes, these being almost completely obsolete. The 

 genus therefore seems to form a group intermediate in 

 many of its characters between the Polygraphi and the 

 Hylurgi, but for the present it should be placed between 

 Chgetophloeus and Carphoborus, from the latter of which 

 it diifers in the structure of the elytra behind, — these being 

 evenly convex with no spinulose crests, — and in the struc- 

 ture of the antennal club, which is here divided by three 

 sutures, and not by two, as in Carphoboras. 



R. heterodoxus »• sp. — Oblong; sides parallel; integuments black, densely 

 clothed with scales mostly dark fus^cous in color, but interspersed with whit- 

 ish ones especially on the flanks and toward the base of the pronotum, re- 

 placed on the head by a dense growth of longer, robust, shaggy pubescence. 

 Head wider than long; front impressed, coarsely and sparsely punctate, shin- 

 ing; antennae dark brown. Prothorax more than twice as wide as the head; 

 sides in the basal two-thirds parallel and distinctly arcuate, slightly constricted 

 near the apex which is broadly arcuate and slightly sinuate in the middle, 

 more than one-half as wide as the base; the latter transversely truncate; disk 

 transvei'sely, strongly convex, two-thirds wider than long, very coarsely, 

 rather densely punctate; scales generally recumbent toward base, erect toward 

 apex; the latter fringed with a dense row of short, very robust, squnmiform 

 hairs, ^/^/^ra at base as wide as the prothorax; sides parallel and nearly 

 straight for two-thirds the length from the base, then gradually rounded; 

 to the apex, which, conjointly, is almost semicircularly rounded; disk 

 cylindiical, nearly one-half longer than wide, two and one-half times as long 

 as the prothorax, elevated along the basal margin, the summit of the elevation 

 being broken into small crests; surface feebly striate; striee punctate; inter- 

 vals flat, coarsely, rather sparsely and unevenly punctate; smaller scalfs 

 usually recumbent; along the middle of each interval there is a row of longer, 

 erect, fuscous scales. Under surface scabrous, black, coarsely punctate. 

 Legs piceous; tarsi paler. Length 1.7 mm. 



Nevada; (Washoe Co. 1). 



The scales of the pronotum are generally entire, but upon 

 the flanks they become narrow, almost hair-like, and are bi- 

 furcate from their base, becoming, anteriorly and near the 



