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new." Tlie head is more strong^ly constricted behind than in any 

 other Acmceops, but the general fascies is similar to the slender spe- 

 cies like longicornis. Eyes deeply emarginate, head and mouth 

 parts and first two joints of antenuct rufo-testaceous; prothorax 

 black, constricted in front, strongly angulated at sides and hind 

 angles prominent, but not produced, longer than wide; densely, not 

 coarsely punctured, a small smooth space on disc near base. Elytra 

 nearly parallel, very coarsely, almost confluently punctured at base, 

 less coarsely at tip, which is bluntly rounded; rufo-testaceous, clothed 

 with \ery tine golden pubescence. This pubescence is scarcely per- 

 ceptible without a strong glass. Legs also rufo-testaceous, hind 

 and middle tarsi and tibiae and part of femora darker. Hind tarsi, 

 with third joint deeply bilobed and densely pubescent beneath, the 

 first and second joints almost glabrous. Beneath black, except 

 head and center of prosternum. 



A. falsa Lee, Proc. Ac. Phil. 1859, P- 8°- 



Length 6 — 7 mm. = .24 — .28 mm. Hab. — So. Cal. 



I have seen no \'ariation in the color of this species, even in the 

 extensive series in Dr. Horn's collection. 



A. discoidea Hald., Trans. Am. Phil. .\, p. 60; Lee, Agass. L. Sup. p. 235; 

 Dej., Cat. 3 ed. p. 381. 

 Length 6.5 — 8 mm. = .26 — .32 mm. Hab. — L. Sup., Mich., Pa., N. J., 

 N. Y., Mass. 



This also is a constant .species; the red color may entirely en- 

 circle the black on the elytra, but is never more than a narrow edge, 

 and it is never missing at the base. 



A. proteus Kirby, 1S37, 1. c, p. 1S6; snblincata Hald., 1. c. p. 60. 



Length 6 — 9 mm. = .24 — .36 inch. Hab.—Vix., L. Sup., Mich., Wash., 

 N. Y., H. B. T.; Col., Or., Wis., Mont., N. Mex., Kans. Can., 

 N. H., Mass., Labrador. " 54° 60°" (Kirby). 



The coloring varies from black to testaceous in every degree. 

 The Ibrm described as gibbida by Dr. LeConte differs by the lateral 

 elevations of prothorax being less prominent and cannot be sepa- 

 rated from the typical form. 



A. pratensis Laich, 1784, \'erz. Tyr. Ins. ii, p. 172; Muls., Col. Fr. 2d ed. p. 

 492, and many other descriptions in European publications; 

 strigilata Fab., Ent. Syst. i, 2, p. 341; Lee, Agass. L. Sup. p. 

 325; J. A. P. ser. 2, i, p. 323; semimarginata Rand., Host. Jour, 

 ii, p. 20; longiceps Kirby, 1. c. p. \^-\ fulvipcnnis Mann., Bull. 

 Mosc. 1853, iii, p. 251. 

 Length 6 — 8.5 mm. = .24 — .34 inch. //</<'>.— Kenai, Col., Mont.. Mich., 

 "54° 65°" (Kirby), Anticosti, N. Mex.. Ks., Or., Me., L. Sup., 

 \'anc., Wyo., Nev. 



