118 GEORGE H. HORN, M. D. 



A. orassulus, 11. sp. — Robust, obovate, blaek, shining. Head very coarsely 

 punctured in front, less densely at middle, front hemihexagonal : clypeus em- 

 arginate in front and distinctly denticulate on each side. Thorax very convex, 

 broader than long, sides moderately rounded, base distinctly margined; sur- 

 face smooth, evenly but sparsely and not coarsely punctured. Elytra robust, 

 A'ery convex, broader behind and obtuse at apex, scarcely one-fifth longer tiian 

 broad, distinctly striate, strife rather distantly punctured; interstices Hat, 

 more convex toward apex, very sparsely and finely punctured. Body beneath 

 black, legs rufo-piceous, antennae rufous, club darker. Length .18— .20 inch ; 

 4.5 — 5 mm. 



Occurs in Georgia and Florida. Easily known from all our species 

 by its very robust form and by the clypeal teeth being more promi- 

 nent, 



I preserve the name under which it is found iu the cabinet of Dr. 

 Leconte. I cannot find that it has ever been either described or men- 

 tioned in catalogue. 



A. ursinus, Motsch. Bull. Mosc. 1815, iv, .365, pi. 6, fig. 60. Mann. Bull. 

 Mosc. 1853, iii, 218. Harold. Berl. Zeitschr. 1863, 386,— Elongate, convex, 

 black, shining. Head sub-scabrous in front, punctured behind, distinctly 

 trituberculate. Front hemihexagonal. Clypeus emarginate at middle, and 

 on each side obtusely prominent. Thorax moderately convex, unequally punc- 

 tured with coarse and fine punctures. Elytra moderately deeply striate, inter- 

 stices feebly convex and very finely and sparsely punctured. Body beneath 

 black, legs rufo-piceous, antennte dark ferruginous, club greyish. Length .28 

 inch. 



This species recalls the general for of denticulatus. Types ai*e in 

 Dr. Leconte's cabinet from Mannerheim and Motschulsky. 



Occurs in Alaska also Kamtschatka. 



A. ruricola, Mels, Proc. Acad, ii, p. 136. Harold, Berl, Ziltsch. 1863,373, 

 curtus, Hald. Journ. Acad. Ser. II, vol. i, p. 105, aurelianus, Harold, Berl. Zeits- 

 chr. 1803, 375, 



A very widely diffused species, occuring over our entire territory 

 from Canada to Texas, and westward to the eastern base of the Rocky 

 Mountains, and presenting slight varieties when specimens from re- 

 mote regions are compared singly, but vanishing when a series em- 

 bracing our whole country is examined. The following description 

 will suffice to render it recognisable among our other species. 



Oblong, convex, shining, rufo-piceous or piceous, never entirely black, usu- 

 ally with the sides and always with the apices of elytra paler than the disc. 

 Front hemihexagonal, clypeus distinctly emarginate at middle, on each side of 

 which the edge is obtusely prominent and not broadly rounded; surface in 

 front rugosely punctured, behind more finely punctulate and distinctlj' but 

 slightly trituberculate. Thorax punctured, finely on the disc more coarsely 

 and densely toward the sides. Elytra moderately deeply striate, and with 

 coarse rather approximate punctures: interstices moderately convex, smooth. 



