I 



A. subaenea Lee, 1. c 1850, p. lor. 



Length 9 mm. = .36 inch. Hab. — Cal. 



This species is grouped with the preceding in the table, the 

 outhne of prothorax behind the tubercle being decidedly concave, 

 but the tubercle itself is very nearly rounded, and the insect resem- 

 bles the following species in form. The color and coarser punctua- 

 tion will, however, distinguish it from subpilosa, its nearest cousin, 

 in the next group. 



A. pinguis Lee, S. IM. C. No. 264, 1873, p. 210. 

 Lentvth 9 mm. = .36 inch. Hab. — Cal. 



' ' The punctures of the basal half of the elytra are arranged so 

 as to give the appearance , of faint longitudinal stripes, of which the 

 inner one runs obliquely forward towards the humerus, so as to tend • 

 to unite with the others" (LeConte). 



This species is at present represented by a unicque in Dr. Horn's 

 collection. 



A. tumida Lee, Ent. Rept. 1857, p. 63; lugens Lee, 1. c.\ fusca Lee, 1. e; 

 californica Lee, J. A. P. ser. 2, I, p. loi; siibcyanea Lee, Ent. 

 Rept. p. 63; viollipilosa Lee, Proe Ac. Phil, i860, p. 321. 



Length 7—12 mm. = .28— .48 inch. Hab.— Oveg., Col, Nev., Cal. 



This species varies in color from black, pardy or wholly fuscous 

 or testaceous to blue, and also considerably in the amount of pubes- 

 cence. The forais described by Dr. LeConte are inseparable and 

 were all referred by him, in 1873, to tumida. The name it will be 

 noted is not the earliest, but the most descriptive. 

 A. viola Lee, Proe Ac. Phil. 1S60, p. 321; Horn, Trans. A. E. S. xii, 1885, 

 p. 180. , 



Length 11 mm. = .43 inch. Hab. — Oreg., Cal., Nev. 



Similar to tumida, but differs as follows: "color violet-blue, 

 legs and antennae black, surface clothed with short, black, erect 

 hair. The elytra are more densely punctate, and the thorax rather 

 less so than in tumida'' (Horn). 

 A. longicornis Kby., 1837, En. Bor. Am. p. 185; Lee, J. A. P. ser. 2, I, p. 321. 



Length 9— 11 mm. = .36— .44 inch. //(?/>.— Cal., Col., Wash., Oreg., 

 "65°" (Kirby). 



Elytra usually black vittate with yellow; legs yellow or black. 

 Varies all black, or all testaceous, suture black, or as in marginalis 

 (Lee, Ent. Rept. p. 28), elytra testaceous, margin black. 



A. vincta Lee, Proe Ac. Phil. 1861, p. 346. 



Length 12—13 mm. == .47— -53 inch. Hab.—CcA., Oreg., Utah, Neb. 

 Closely resembles preceding in form, color and variations. 

 Differs by head being oblicjue behind the eyes, hind impression of 

 prothorax deeper and general form less robust. 



