494 Goleopterological Notices, V. 



tubercles convex, broad ; surface behind them abruptly deeply and trans- 

 versely excavated from side to side, the excavation trisected by two feeble 

 carinas at the bottom, its posterior margin acute and feebly bilobed ; in the 

 middle on ihe upper surface immediately behind each lobe tiiere is a large 

 fovea, the two approximate and each bearing a tuft of long erect set.-e ; occiput 

 and vertex without other impressions, even, very strongly convex, arched and 

 elevated above the eyes, the latter prominent and convex, near the base ; 

 tempora with a dense tuft of coarse setae ; under surface strongly but broadly 

 convex behind the oral opening ; antennae not quite one-half as long as the 

 body, the first joint a little longer and thicker, two to eight subquadrate, nine 

 and ten but little larger, nearly as long as wide, eleventli large, thick, oval, 

 obtusely pointed. Prothm-ax nearly as long as wide, hexagonal, widest a little 

 before the middle ; apex three-fourths as wide as the base. Elijtra nearly as 

 long as wide, three-fourths longer than the prothorax and nearly twice as 

 wide ; sides feebly arcuate behind ; humeri strong, broadly exposed at base ; 

 discal stria extending to the middle. Abdomen a little narrower tlian the 

 elytra but nearly as long ; border as in Cylindrarctus ; carinte of tlie first and 

 second dorsals subparallel, separated by a little less than one-third tlie discal 

 width, tlie first two-thirds, the second one-fourth as long as the respective 

 segment. Metasternum large but not tumid, perfectly even tliroughout. 

 Length 1.8 mm. ; width 0.7 mm. 



California (Siskiyou Co.). 



The male sexual modifications of the under surface are very 

 feeble, consisting only of a small and very feeble impression of the 

 sixth ventral, with a narrow feeble sinuation of its apex, the sinua- 

 tion receiving the very minute transversely oval pygidium on the 

 same plane. In the female the subfrontal excavation is doubtless 

 wanting, but it would be interesting to note the position of the 

 vertexal fovese, as these seem to be peculiarly modified and con- 

 nected in some way with the excavation in the male, if, indeed, 

 the two foveas mentioned above are really the two ordinary ceph- 

 alic foveas of the family. 



PSELAPHINT. 



PSELAPHU§ Herbst. 



In this singular genus there are two characters which, though 

 probably not peculiar to it, are nevertheless strikingly developed. 

 The first relates to the position of the two large spongiose fove^e of 

 the head, which, in most genera possessing them, are situated on a 

 comparatively flat surface and are distinct from a vertical point of 

 view. In the present genus the upper surface becoines abruptly 

 declivous far beliind the middle, the declivous wall being almost 



