AMERICAN COLEOPTERA. 125 



i?cen except when viewed between the lens and a strong light. Body beneath 

 black,, shining, legs piceous-black. Mesosternuin flat, not carinate. Length 

 .28 — ..".0 inch ; 7 — 7.5 mm. 



In all the specimens before me the apices of the elytra are .slightly pro- 

 longed and each rounded at tip, they are probably all males. 



Occurs in the Middle and upper Southern States. 



A. stupidus, n. sp. — Oblong, robust, black, sub-opaque. Head coarsely and 

 moderately densely punctured less densely at the sides and anterior margin. 

 Clypeus emarginate at middle and round on each side and with a very faint 

 sinuatiou in front of genoe. Thorax moderately convex, sides rounded, surface 

 densely punctured but less coarsely and densely than in lutulentu.i, base with c c 



entire marginal line. Elytra moderately convex, sides sub-parallel, moder- , / 



ately striate with scnreely any traces at apex, and rugose and muricate becom- 

 ing smoother toward the apices of the elytra. Body beneath black, shining, 

 legs piceous. Mesosternum not carinate. Length .20 — .22 inch; 5 — 5.5 mm. 



In one specimen before me the margin of the elytra uear the apex 

 is slightly sinuate ( 9 ?) and slightly more prolonged than in two 

 others ( S '■) iu which the margin is entire and the apex more obtuse. 

 This species is less opaque than lutulcntus and the minute hairs rather 

 more evident and apparently greyish. 



The only specimens known are from Georgia. 



A. lentus, n. sp. — Elongate oval, slightly depressed, brownish ferruginous, 

 sub-ojiaque. Head coarsely but sparsely punctured, less densely at the sides, 

 and in front nearly smooth. Clypeus feebly emarginate, rounded on each side 

 and not sinuate in front of gense. Thora.x moderately convex, sides feebly 

 rounded, base distinctly margined, surface rather coarsely and evenly punc- 

 tured. Elytra elongate oval, moderately deeply striate with scarcely any 

 traces of punctures in the strife, interspaces flat transversely wrinkled and 

 muricate and with few very minute hairs. Body beneath shining ferruginous. 

 Mesosternum, between the coxse, distinctly carinate. Length .15 inch; 

 4 mm. 



The elytral stria) of this species are equally deep at base and apex, 

 the inner stride being long, and extending nearly to apical mar- 

 gin and not confluent with the outer series of strise. The margin 

 near apex is very faintly sinuate in both .specimens before me. It 

 may be possible that the color of this .species is due to immaturity, it 

 is however less oparjue than either of the preceding and may readily 

 be known by the carinate nicstisternum. 

 Pennsylvania and Georgia; rare. 



Group L contains species agreeing in having the elytra entirely 

 glabrous and shining and without any traces of pubescence. They 

 vary much in other characters so that were it deemed advisable, several 

 groups could be constructed as ni.ay be seen fr<jm the following table, 

 where may be found species with slender and stout hind tibi;x! and 



TRANS. AJIER. EST. SOC. (17) SEI'TKMIIKR, 1870. 



