260 AMERICAN COLEOPTERA. 



Type. — Aiioplocephalus cribrifrons n. sp. 



This genus is difficult to place in the present classification. The 

 unarmed head and thorax, alike in both sexes, would ratlier bring 

 it in Lacordain's sub tribe Cyclocephalides, but differs from all the 

 described genera by the distinct basal margin of the thorax. 



As much as I was able to learn from the published descriptions 

 this genus is intermediate between Lacordaire's Cyclocephalides and 

 Oryctides. 



Anoploceplialus cribrifrons n. sp. — l/a?*-. — Elongate-oval, black, 

 shining, underside and legs piceous or dark castai.ieous. Head and c-lypeus 

 coarsely and rather cribrately punctate, front feebly convex; clypeus not sepa- 

 rated by a suture, nearly flat, 'side margin more feebly reflexed than at apex, the 

 latter strongly reflexed and deeply emarginate at middle, sides slightly arcuately 

 narrowing to apex, feebly sinuate near the latter point. Prothorax transverse, 

 simple, without tubercle or impressions, apex narrower than base, sides arcuate; 

 apex, base and sides distinctly margined ; hind angles rounded, front angles dis- 

 tinct; surface somewhat sparsely but not coarsely punctured behind, more 

 densely at apex and sides. Elytra elongate-oval, slightly broader behind, surface 

 not strongly convex, striae deeply impressed with not densely placed ocellate 

 punctures, intervals convex, rugose. Front tibite tridentate, middle and hind 

 tibise with one well defined and one smaller indistinct ridge; in both, the apex 

 is festooned with a number of more or less triangular teeth. Front and middle 

 tarsi longer than the tibise, hind tarsi as long or slightly longer than the tibiae; 

 first joint of middle and hind tarsi feebly compressed and nearly twice as long 

 as second, all the tarsi equal, simple. Sides of thorax beneath, presternum and 

 metasternum with moderately long, coarse, fulvous hairs. Last two abdominal 

 segments nearly twice as broad as the preceding, last segment broadly emargi- 

 nate at apex. Pygidium convex, feebly punctate at middle and apex, finely ru- 

 gose along basal margin. Length 22 mm.; width 12.2.5 mm. 



The female differs in having the clypeus more feebly reflexed and not as 

 deeply emarginate, the pygidium not as convex, the last abdominal segment not 

 emarginate, first joint of middle and hind tarsi more broadly dilated at apex and 

 the front and middle tarsi slightly shorter, but the hind tarsi much shorter than 

 in the male. Length 24 mm. ; width 13 mm. 



Huachuca Mts., Arizona. 



There is nothing in our fauna with which this species could be 

 compared. It has nearly the form of Ancognatha manca, but is 

 longer, more robust, elytra deeply striate, and has a different cly- 

 peus and mouth parts. 



