[101] 



NORTH AMERICAN COLEOPTERA. 257 



Central Illinois 1; Mr. F. M. Webster. 



The scales are generally white, but are slightly 

 darker along the flanks of the elytra, where they are very 

 small. The rows of scales upon the elytral intervals are 

 not uniformly single or double, but in many spots become 

 more crowded and irregular. 



RENOCIS n. geii. (Hylurgini). 



Body subcylindrieal. Head prominent, not concealed by the prothorax, 

 inserted in the prothorax nearly to the eyes; slightly deflexed, not at all 

 produced, beak entirely obsolete; eyes rather finely granulated, not at all 

 prominent, on the sid^s, extending slightly under the head, short, very 

 .strongly transverse, with a small feeble sinuation in the anterior margin; 

 antennae inserted on the sides of the head just before the eyes, short, ten- 

 jointed; basal joint longer than wide, rather robust; second not one-half as 

 1 >ng, subglobular; three to six very small; joints seven to ten forming a very 

 abrupt, elongate, oval club, longer than the entire preceding portion, strongly 

 compressed, sparsely pubescent. Mandibles prominent, short and stout, 

 perfectly chisel-shaped apex transversely truncate, straight; inner face at 

 apex obliquely truncate. Mentum short, transverse; maxillae, liguli and 

 palpi very small, invisible under a mass of coarse hair surrounding the men- 

 turn. Labrum wanting. Anterior coxae prominent, subglobular, contiguous; 

 middle coxae widely distant, small, not prominent; posterior separated, 

 transverse, attenuated laterally, only attaining the metasterual episternuua, 

 which is long, rather wide; sides parallel; epimeron not visible. Anterior 

 coxae in contact with the head beneath; prosternum entirely obselete before 

 them; femora rather robust, simple; tibiae very narrow at base, rapidly 

 dilated and compressed toward apex, margined externally with a row of short, 

 very robust spinules, obliquely truncate at apex; tarsi rather short, slender, 

 not at all dilated but rather compressed, five jointed; third obliquely truncate 

 and slightly produced beneath, not biljbed; fourth very minute; fifth slender, 

 1 mger than the preceding united. Abdominal segments five in number; first 

 two subequal, each nearly as long as the third and fourth together. Elytra 

 covering the entire abdomen; pygidium invisible; prothorax strongly rounded 

 at the sides, transverse, convex; sides continuous in curvature from the 

 dorsal surface to the anterior coxaa. Integuments covered with a dense 

 scabrous mass of scales; base of elytra elevated and tuberculate. Scutellum 

 not distinctly visible. 



In this genus the antennal club is strongly compressed, 

 elongate-oval, obtusely pointed and four-jointed, the joints 

 being connate and separated by straight transverse sutures. 

 Both surfaces are glabrous, except the apices of the joints. 



