AMERICAN COLEOPTERA. 11 



except in front and becoming much inferior posteriorly ; disc with feeble median 

 triangular irn|iression, on each side a moderately deep fovea; surface coarsely 

 and moderately densely punctured, slightly less densely at middle. Elytra 

 as wi<le as the base of tlie thorax, umbone feebly prominent sides sinuate at 

 middle. ay)ical tiiird rapidly narrowed and moderately serrate; disc feebly 

 depressed, striate, striae coarsely punctured the two outer striae very deep and 

 with a very deep short stria beneath the umbone, intervals flat on the disc 

 outer ones convex and with a row of fine distant punctures; surface with 

 numerous small yellow spots, forming at apical third two small irregular bands, 

 which are red at the margin. Body beneath distinctly bronzed, very sparsely 

 clothed with greyish hairs, longer and denser on the metasternal side-pieces. 

 Prosternum in front distinctly t'isinuate, coarsely punctured. Abdomen moder- 

 ately coarsely but «ot densely punctured, last ventral with distinct double 

 apical margin. Length .32 — .42 inch; 8 — 10.5 mm. 



Four specimens Texas. This species is easily known in this group 

 by the elytral ornamentation and the very distinct sinuation of 

 tlie sides. 



A. sparsa, n. sp. — (PI. I, fig. 10.) Body black shining with slight bronze 

 liistie, surface with few short black hairs, form not robust, elytra with few 

 small yellow spots widely scattered more numerous near the tip. Head coarsely 

 punctured, front feebly impressed, vertex with faint carina. Tiiorax nearly 

 twice as wide as long, apex feebly emarginate and but little narrower than the 

 base, sides feebly arcuate, margin feeble, not visible from above; disc with 

 triangular median impression and a fovea on each side at base; surface coarsely 

 punctured, very sparsely at middle, more densely at the sides, color uniform. 

 Elytra as wide as base of thorax, umbone moderately prominent, sides gradu- 

 ally converging from base to apex, more raj)idly at apical third and moderately 

 serrate; disc moderately convex, striate, striae obliterated at middle near the 

 base, moderatt'ly punctured, intervals flat, uniseriately punctulaie, the three 

 outer intervals convex and the third more elevated at base; surface black, 

 shining, with slight bronze tinge and with small yellow spots very s()arse!y 

 placed, arranged vaguely in a median row of five or six and a submarginal 

 series consisting of tiiree or four groups. Body beneath black with slight bronze 

 lustre, with few whitish hairs. Prosternum trisiuuate in front, very sparsely 

 punctured. Abdomen very sparsely and finely punctured, last ventral with 

 distinct double margin. Length ..38 inch; 9.5 mm. 



I have seen but two specimens of this species, both similar in 

 style of marking, collected in Colorado, that in the cabinet of Dr. 

 Leconte from Manitou while that from Mr. Ulke is without special 

 locality. 



A. tuta, n. sp. — (PI. I, fig. II.) Black with cupreous lustre, form moder- 

 ately robust, surface with few black erect hairs, thorax margined with yellow, 

 elytra with three la.scise interrupted at middle and an apical marginal spot 

 yellow. Plead coaisely and denr=ely punctured, a faint frontal impression and 

 vertical carina. Thorax neaily twice as wide as long, apex feebly emarginate, 

 base truncate, sides moderately arcuate and gradually but feebly diverging from 

 apex to base; disc with feeb.'e median triangular impression with a moderate 



