512 BULLETIN UNITED STATES GEOLOGICAL SURVEY. [YolY. 



punctures than usual, tliose of tlie interspaces of tlie same size as those 

 of the striae, but less close. Hind thighs of S dilated at the extremity 

 into a very large tooth, acute at tip, the distal margin of which is oblique 

 and the proximal concave in an arc of a circle. Length, 2.8°"". 



California, Oregon, and British Columbia. Easily known by its more 

 elongate form. 



Hybnobius latidens. — Eufo-testaceous, shining, of usual form ; strise 

 composed of finer punctures, less deep near the tip ; interspaces with 

 distant, fine transverse lines. Hind thighs of the S strongly dilated into 

 a wide tooth, the distal margin of which is oblique and feebly concave to 

 the linee, the proximal margin straight from the ai)ex to the base of the 

 thigh ; apex of the tooth obtuse, but slightly prominent. Length, 2'"'". 



Anticosti ; Mr. W. Couper. Similar to H. pumilus, but the elytral 

 punctures are less obliterated behind, and the tooth of the hind thighs 

 is much larger ; the thighs are also less i^unctured. 



The hind thighs are not toothed in three specimens of H. suhstriatus 

 Lee. in my collections, and 1 am therefore unable to place the species 

 properly. It is quite possible that H. curvidens above described is the 

 corresponding <?. 



In SydnoMus Mattheivsii Crotch (Tr. Am. Ent. Soc. 1874, 74.), I per- 

 ceive no differences in the four specimens in my collection, except that 

 in the two larger ones the spurs of the front tibiae are very unequal ( S ),, 

 and in the other two they are nearly equal. 



ClAjVIBTJS vulneeatus. — Oval, convex, black shining, not densely 

 but distinctly pubescent with yellowish hair. Elytra with a large trans- 

 verse red spot about tlie middle, which is wider near the suture; antennae 

 and legs testaceous. Length, l"""". 



Garland, Colo. ; one specimen. 



Sacium biguttatum. — Elongate, black, very finely pubescent. Pro- 

 thorax not wider at base than its length, sides and apex strongly mar- 

 gined, diaphanous in front for nearly one-third of the length. Elytra each 

 with a rounded red spot a little behind the middle, and half way from 

 the suture to the side. Under surface and legs black. Length, 1.6™"i. 



Veta Pass, Colo. Of the same size and form as L. luguhre and 

 odscuruni, but the prothorax is rather longer, and the elytral spot dis- 

 tinguishes it at first sight. 



Antherophagtjs convexulus. — Elongate-oblong, fuscous, antennae, 

 legs, part of under surface and elytra rufo-testaceous, finely puuctulate, 

 clothed with extremely fine pubescence. Prothorax transverse, not 

 wider at base, sides nearly straight and parallel, obsoletely angulated 

 about the middle ; hind angles somewhat obtuse, not rounded, base finely 

 margined, foveate each side. Length, 3.2"™. 



Le Conte, New Spec. Coleopt. (Smiths. 8vo), 1, 71. 



