446 Coleopterologieal Notices, VI. 



not quite us long as wide, much longer than the prothorax, dis- 

 tinctly narrowed behind from the base; external apical angles 

 right and but slightly rounded ; disk coarsely, feebly and imper- 

 fectly imbricate and finely, snbtransverseh' strigilato-reticulate. 

 Aljdomen with the erect black setffi only moderate in length but 

 distinct to the base. Length 1.8 mm.; width 1.2 mm. 



District of Columbia and Massachusetts. This is an isolated 

 species, in no way closel}^ related to basalis, differing in its larger 

 size, more transverse and much less conical prothorax, and in its 

 longer and sparser pubescence. It difters most radicall}-, however, 

 in tlie male sexual characters, the fifth ventral in that sex being 

 broadly sinuate in more than median two-thirds ; the sinuation 

 rounded and about ten times as wide as deep, the sixth segment 

 having a deep rounded sinuation in about median third. The 

 epipleurie are rather narrow but extend to the elytralapex, gradu- 

 ally vertical externally towards base, glabrous but with a few 

 sparse hairs posteriorly. The two specimens from the last named 

 localit}', since received, do not diflfer in any way from the original 

 female tyi)e from the District of Columbia. 



13. C crassa Grav. — Microp. p. 190 (Tachyporus) ; Er. : Gen. Staph., p. 

 222. (Conurus); Horn: Tr. Am. Ent. Soc, TL, p. IIU; masfa Say, Trans. 

 Am. Phil. Soc, IV. p. 4GG (Tachyporus). 



Stout, oval, strongly convex, blackish, the base of the el3'tra 

 and basal margin of the pronotum suflusedly rufescent ; abdominal 

 segments slightly paler at apex, especially the fifth ; base of the 

 sixth also largely rufous ; legs dark rufous ; last joint of the an- 

 tennse yellow; pubescence rather coarse and moderately dense. 

 Length 2.3-2.7 mm.; width 1.5-1.8 mm. 



New York and North Carolina (Asheville) to Wisconsin (Bay- 

 field). This is a common and widel}' distributed species of large 

 size,beingmuch the largest American representative of the genus. 

 The male has the fifth ventral perfectlv simple at apex, the sixth 

 having a ver}' large and deep, almost circularly rounded emargina- 

 tion, and there are numerous long black setfe on the abdomen 

 beneath and at the sides as far as the base. The epipleur;^^ are 

 very narrow, attenuate behind, not attaining the elytral apex, 

 glabrous and polished throughout and becoming strongly vertical 

 toward base. The elytral sculpture is not imbricate, each of the 

 minute punctures having two short divergent lines extending 

 posteriorly, and the scutellum is parabolic and rounded at tip. 



