122 GEO. H. HORN, M. D. 



surface. The elytral spots are well defined and in all my specimens are 

 the same, consisting of a broad but short common scutellar black spot, 

 and an oval spot near the tip equidistant from apex, margin and suture. 

 It is also more sleuder than any other of our species. Length .16 

 inch ; 4 mm. 



Occurs with the preceding and is not rare. 



A. oregonensis, n. sp. — Head black, anterior margin of front rufous. 

 Thorax slightly broader than long, slightly narrower behind, varying in color 

 from rufous with median black space, to nearly black with margins and basal 

 angles narrowly rufous ; surface shining. Elytra shining, slightly rugulose, 

 pale yellowish with median black vitta on each, broader at base and apex and 

 very narrow at middle. Legs black, femora at basal half testaceous; thorax 

 and abdomen beneath pale yellowish, the latter tipped with black. Length 

 .10 inch; 2.5 mm. 



The markings of the elytra vary as is indicated in the remarks 

 under rostratus, the majority of the specimens have the black vitta 

 almost divided and in one specimen in which the thorax is nearly 

 black, the yellow margin is reduced to a minimum. 

 Collected in Southern Oregon, by Mr. Wm. M. Gabb. 



A. nigrcllus, Lee. (Acletus), Proc. Acad. 1852, p. 167. 



I cannot find any valid differences between the type of this species 

 and the genus Attains. The antennae have joints more acutely tri- 

 angular with the angles more prolonged than is usual in the genus. 

 The second tarsal joint is oblique to those following it in the unique 

 before me, but the position is merely one of accident, such as has 

 already been referred to. 



The species is totally black with feeble lustre. The thorax broader 

 than long, the angles all rounded, the hinder slightly reflexed. The 

 elytra are subqrarallel and somewhat rugose as in many of the species. 

 Length .12 inch ; 3 mm. 



Occurs in the Lake Superior region. 



A. basal is. Lee. (Anthocomus), Proc. Acad. 1852, p. 166; Lee. List (Attalus), 

 p. 54. — A small piceous black, shining species, almost as much dilated behind 

 as granularis, with the base of the thorax margined with yellow. In the male 

 the apex and a small portion of the sides and suture are also bordered with 

 yellow. Legs varying from piceous to testaceous. Body beneath black. 

 Length .06 inch; 1.5 mm. 



Occurs in the Colorado Desert and Lower California. 



A. terillinalis, Er. (Anthocomus), Entom. p. 108; Lee. (Attalu.s), List, p. 

 54; hecmorrhoidalis, Motsch. (Scalopterus) Bull. Mosc. 1859, iv., p. 408.— A small 

 species totally black above, shining and sparsely pubescent. The tips of the 



