NORTH AMKIUCAN COLEOPTERA. 153 



margin visible in its whole extent. Anteniue stont, inserted two-fifths from the 

 apex (%). or about the middle (? ), second joint of fiinicle distinctly longer 

 than the third. Head shining, remotely punctolate. Prothorax wider than 

 long, about three-fourths as wide at the apex that at base, sides strongly rounded, 

 converging and nearly straight near the base, indistinctly constricted at the ai)ex, 

 surface rather densely, but not coarsely punctured ; interstices feebly shining, 

 scales condensed on the basal third of the median line and somewhat on the 

 lateral margin. Scutel distinct, scaly. Elytra two-fifths wider at the base than 

 the prothorax and about one-half longer than wide, humeri prominent, rounded, 

 sides straight for one-half their length then rounded to the apex, di.stinctly 

 punctato-striate, strise impressed, not concealed by the scales; interstices finely 

 rugulose. somewhat shining; set«e not evident, humerHl and short basal line on 

 third interspace whitish ; antecoxal ridges not very prominent, postocular lobes 

 distinct. Legs stout, thighs distinctly clavate, tibiai subparallel, apical hooks 

 distinct; tarsi stout, third joint bilobed, fourth projecting the length of the 

 third; claws connate beyond the middle. Length 2.5 mm.; 0.10 inch. 



Hab. — Kansas, Texas (LeConte), New York (Jiilich), District 

 of Columbia (Dr. Horn). 



A very distinct form. Very closely allied to atratus, from which, 

 on superficial examination, it cannot be distinguished ; differs, how- 

 ever, in form of beak, the second joint of funicle distinctly longer 

 than the third, the less strongly convex prothorax and the more 

 sharply impressed elytral stria*, the scrobes are much less oblique 

 and visible whe!i viewed laterally in their whole extent. For the 

 differentiation fron) sculpticotlis, which it somewhat resembles, 1 refer 

 the student to the remarks under the following species, which apply 

 equally well here. 



S. atrHtns n. sp. — Suboval, rather robust, moderately convex, deep black: 

 legs fuscous, base of femora, knees and tarsi dark piceous; underside of body 

 thinly clothed with small, whitish, piliform scales, denser on the thoracic side 

 pieces; above, scales very sparse, condensed in spots or lines, white, variable in 

 size, but mostly very small. Beak ( % ) stout, strongly curved, longer than head 

 and prothorax, slightly tapering from the base to the apex, feebly shining, punc- 

 tured and substriace, very thinly pubescent, basal tufts obsolete, constri(;tion not 

 deep; scrrobes very oblique; visible, when viewed laterally, in their apical fourth 

 only. Antennae stout, inserted two-fifths frotn the apex, second joint of fuuicle 

 a trifle longer than the third, outer joints wider, merging into the clava, latter 

 densely pubescent, glabrous at the base. Prothorax wider than long, very little 

 wider at the base than at the apex, latter very feebly constricted, sides rather 

 strongly rounded ; surface very densely and rather coarsely punctured, scales 

 condensed on the lateral margin and along the median line, Scutel very small. 

 Elytra oval, two-fifths wider at the base than the prothorax and one-half longer 

 than wide, sides feebly rounded for three-fifths their length, thence broadly 

 rounded to the apex, humeri prominent, rounded, strise feebly impressed, a little 

 more so near the suture, distinctly punctured, scales condensed on the humeral 

 prominence, a short basal line on the third interspace and in spots on the disc 



TKANS. AM. ENT. SOC. XXI. l-iOl .MAY, 1894. 



