AMERICAN COLEOPTERA. 59 



clypeal convexity but with two distant moderately distinct impres- 

 sions; punctuation dense except at middle of occiput. Prothorax 

 fully one-half wider than long, strongly rounded at middle, oblique 

 and feebly sinuate both anteriorly and posteriorly; hind angles sharply 

 defined, a little obtuse, front angles obtuse; punctuation moderate, 

 punctures separated by about their own diameters at sides, less close 

 at middle; all the lateral foveas evident though less marked than in 

 fossipalpa. Elytra two and three-fourths as long as the prothorax, 

 not wider behind, costas distinct, all the intercostal spaces with con- 

 fused punctures. Ungual tooth obviously post-median in position, 

 the tip of the tooth barely two-thirds as far from the apex as from 

 the base of the claw. Length 12 mm.; width 6.2 mm. 



Described from a single example taken by Prof. Snow in 

 southeastern Arizona (Baboquivaria Mountains). The unique 

 type is a male, having the abdomen flattened and densely 

 finely punctate and hairy at middle, the front and hind legs — 

 especially the femora and- tibiae — densely hairy within. The 

 impression of the last joint of the maxillary palpus is large 

 and deep, extending two-thirds the length of the joint. As 

 indicated under fossipalpa, this species resembles that very 

 closely, but differs in its less sinuate sides of the prothorax, 

 in having all the intercostal intervals confusedly punctate, 

 and in the more posterior position of the ungual tooth. The 

 male sexual characters are unusually pronounced in ilhtstris, 

 and may prove to be quite different in fossipalpa. 



50. D. beyeri Schaef. 



Form oblong, parallel; reddish brown, only moderately shining; 

 elytra finely, prothorax just visibly alutaceous. Mentum declivous 

 from about the anterior third, margin of declivity rather feebly raised. 

 Head scarcely more than half as wide as the prothorax, clypeus 

 broadly reflexed, sinuate at middle, angles broadly rounded, sides 

 sinuate; clypeal suture distinct; front evenly subconvex, without im- 

 pressions; punctuation moderately dense, narrowly smoother along 

 the suture. Prothorax fully one-half wider than long, sides mod- 

 erately strongly rounded at middle, oblique and nearly straight before 

 and behind, more strongly convergent in front; front angles obtuse, 

 hind angles sharply defined, a little obtuse; disk rather strongly 

 convex, punctures separated by about their own diameters laterally, 

 a little sparser toward the middle. Elytra parallel, twice as long as 

 and very little wider than the prothorax; discal costae evident, punc- 

 tuation confused in all the intercostal spaces, but often only slightly 



TRANS. AM. ENT. SOC, XXXV. MARCH, 1909. 



