G22 Coleopterological Notices, IV. 



which I have in mind, and fails completely in Conoproctus Lac. of 

 the present tribe, where the sexual differences in the form of the 

 beak, point of antennal insertion and structure of the pygidium, 

 become extreme in C. J^-pustulatus Fab., as before described under 

 the genus Madarellus. 



The species may be thus distinguished: — 



Piceous ; legs rufous ; setse long and conspicuous ; pronotum strongly and 

 longitudinally strigose 1 strigata 



Black throughout, suhglabrous, the setse extremely sparse and short; pro- 

 notum more finely punctate, the punctures distinct, sometimes feebly 

 coalescent longitudinally 2 pro c era 



1 Centriuogj na strigata Lee— Proc. Am. Phil. Soc, XV, p. 421 

 (Centrinus). 



The original description of what LeConte designates a remark- 

 able species from an inspection of the female alone, is well given 

 and ample for purposes of recognition, except that the anterior coxa? 

 are onpy separated by about three-fifths of their own width. The 

 beak is rather slender, evenly, moderately arcuate and does not differ 

 appreciably in the sexes; it is sparsely punctured and has a very 

 even line of small punctures along each side of the median impunc- 

 tate line. The prothorax is very nearly as long as wide, parallel 

 and feebly arcuate at the sides and abruptly, broadly and strongly 

 tabulated at apex, the base transverse, the median lobe very small 

 and almost obsolete; disk with longitudinally, closely, unevenly 

 and deeply plicate or rugose sculpture, the impunctate line very dis- 

 tinctly defined, polished and somewhat elevated. The elytral striae 

 are moderately coarse, deep and abrupt, impunctate, the intervals 

 flat, nearly three times as wide as the grooves, each with a single 

 somewhat uneven series of rather small but deep, approximate 

 punctures. Length 3.5-4.8 mm.; width 1.2-1.7 mm. 



Colorado and Wyoming. Taken in abundance by Mr. Wickham 

 at Greeley and Laramie. 



2 Ceiitrinogy na procera n. sp. — Elongate, parallel, moderately con- 

 vex, shining, black throughout, the vestiture consisting of very small setiform 

 squamules, which are exceedingly sparse and inconspicuous but more evident 

 at the sides of the pronotum and last three ventral segments, and near the 

 apex of the met-episterna. Head minutely, sparsely punctured, the trans- 

 verse impression strong, broadly angulate in profile ; beak rather thick, sub- 

 cylindrical, evenly, rather feebly arcuate, as long as the prothorax, hardly 

 differing in the sexes, but a little thicker and more punctate in the male, the 



