AMERICAN COLEOPTERA. 57 



labial with last joint somewhat triangular; mentum large, trapezoidal. 

 Prothorax wider than long, very much narrowed in front, rounded 

 and overhanging the head at tip, rounded on the sides near the hind 

 angles, which are acute; base bisinuate. Scutellum . rounded, con- 

 cave. Elytra a little wider at base than the prothorax, rounded at 

 the base, slightly enlarged for two-thirds the length, then obliquely 

 narrowed; side margin distinct, wider towards the tip; strife faint, 

 the sutural deep towards the base. Prosternum narrow, prolon^'ed 

 -behind the coxae, and received into the mesosternum, which is trian- 

 gularly incised in front and rather narrow between the coxte. Front 

 coxas transverse, prominent, with large trochantin; middle coxte with 

 narrow trochantin extending to side pieces; hind coxse laminate, 

 gradually dilated inwards. Abdomen with the 1st ventral shorter and 

 the 5th longer than the others which are equal. Legs slender tarsi 

 not lobed, a little shorter than the tibiae, joints 1—4 equal, 5th equal 

 to the three preceding united, claws simple, onychium not visible. 



Were it not that the front coxae and insertion of the antenna; for- 

 bid, this insect would be referable to the Eucnemidse, to which family 

 it has much resemblance in appearance. 



The afiSnitijs are of course with Lichas and Stenocolus. From both 

 it diflfers by tha more convex front, the less elongate and less serrate 

 antennas, the more prominent front coxae, the less prolonged excava- 

 tion of the mesosternum and the 1st ventral segment much shorter ; 

 it differs besides by the prothorax being produced over the head, and 

 not margined at the sides. In Lichas moreover the onychium is con- 

 spicuous, and in Sfenocolus there is a series of smooth oblique scars 

 on each side of the ventral segments. 



A. monachus.— Blackish-brown, densely clothed with short yellow- 

 brown pubescence, very finely punctulate; prothora."! with two round basal 

 fovese, between which the base is depressed; elytra faintly punctured in stria, 

 sutural stria deep for one-quarter the length from the base. Length A inch; 

 10 mm. 



Oregon; Lord Walsingham. The basal fovese of the prothorax 

 are nearer together than to the sides. 



DICRANOPSELAPHIJS Gue'rin. 

 D. E<lwar<Isii.— Broadly ovate, not very convex, finely pubescent, 

 black; elytra testaceous with feeble grooves which are irregularly punctured, 

 interspaces as wide as t.he grooves, nearly smooth; prothorax bisinuate at 

 base, much wider than long, sides and tip rounded in the arc of a circle, mar- 

 gin concave, reflexed, transparent and white along the front as far as the mid- 

 dle ; scutellum large, black; legs brownish testaceous; antennae black, 

 second joint very small. Length .22 inch; 3—4.3 mm. 



TRANS. AMEH. ENT. SOC. (8) MARCH, 1874. 



