AMERICAN COLEOPTERA. 25 



from above, inferior and less distinct posteriorly; disc with broad median im- 

 pression deeper behind and a rather deep but small impression on each side at 

 base; surface coarsely punctured, sparsely at middle, more densely at the sides. 

 Elytra as wide at base as the thorax, umbone feeble, rather more than two and 

 a half times as long as wide, sides gradually narrowed to tip and acutely serrate; 

 disc moderately convex, with strise of large somewhat confluent punctures, 

 intervals 3—5—7 subcostiform ; surface with small yellow spots arranged in a 

 dorsal series of three or four and a submareinal series. Body beneath feebly 

 bronzed. Prosternum with the alse attaining the anterior angles, at middle 

 with short lobe emarginate in front and rather strongly angulate at the sides. 

 Abdomen sparsely punctured at middle, more densely at the sides and clothed 

 with rather long greyish hairs, last ventral without subapical carina but with 

 rather deep but broad marginal groove. Tarsi slender not dilated, and nearly 

 as long as the tibiae. Length .38 inch ; 9.5 mm. 



One specimen from near Fort Yuma, California. 



A. alacris, n. sp. — (PI. I, fig. 40.) Form of comata, color metallic green, 

 sides of thorax and elytra ornate with yellow, surface with short brownish 

 hairs. Head densely j)unctured, front convex, vertex not carinate. Thorax 

 one and a half times as wide as long, apex very feebly emarginate and slightly 

 prolonged at middle over the head, sides feebly r.rcuate in front, nearly straight 

 and feebly divergent posteriorly; margin feeble not visible from above; disc 

 with feeble median impression and a punctiforra fovea on each side at base; 

 surface densely and coarsely punctured, sides margined with yellow which is 

 less densely punctured. Elytra as wide at base as the thorax, umbone feeble, 

 sides subparallel, at apical third gradually narrowed to tip and acutely serrate ; 

 disc moderately convex, with striae of large subconfluent punctures, intervals 

 3 — 5 subcostiform; surface ornate with yellow as follows: a narrow marginal 

 space from base to middle joining a short transverse triangular spot, a narrow- 

 short stripe on third interval at base, an irregular spot at middle, posteriorly 

 two transverse bands interrupted at suture. Body beneath bronze green, very 

 sparsely pubescent. Prosternum truncate, alse attaining the angles of the 

 thorax. Abdomen very sparsely punctulate, last ventral without subapical 

 carina or groove. Tarsi longer than half the tibise. Length .36 inch; 9 mm. 



These two species difler especially in the form of the sternum and 

 vestiture of the abdomen. 



One specimen given to Dr. Leconte by Dr. Sharp of Scotland, col- 

 lected by Mr. Hardy in the same region with the preceding. 



Bibliography and Synonymy. 



A. cuprina, Spin. Ann. Ent. Soc. Fr. 1838, p. 367. 

 hirtula, Gory, Mon. Suppl. p. 29, pi. v, fig. 27. 

 A. amplicollis, Lee. Proc. Acad. 1866, p. 383. 

 A. opacula, Lee. Proc. Acad. 1859, p. 69; Revis. Buprest. Trans. Am. Philos. 



Soc, Ser. 2, vol. xi, p. 222, pi. i, fig. 5. 

 A. amabilis, n. sp. 



TRANS. AMER. ENT. SOC. VII. (4) JANUARY, 1878. 



