AMERICAN COLEOPTERA. 67 



61. D. cephalotes n. sp. 



Oblong-ovate, dark brown, with faint aeneous reflections in certain 

 lights, polished, alutaceous sculpture scarcely detectable at any point. 

 Mentum quite strongly obliquely declivous anteriorly from about the 

 middle, and somewhat oblique posteriorly, margin of declivity obtuse 

 not raised. Clypeal margin sinuato-truncate at middle, the angles 

 rounded; clypeus with rather strong transverse tumidity, behind which 

 the suture is deeply impressed; front rather deeply triangularly im- 

 pressed at middle; punctuation of head moderately coarse, close, but 

 not crowded on the clypeus, the punctures on the front separated on 

 the average by about their own diameters. Prothorax three-fifths 

 wider than long, sides parallel in basal half, moderately rounded at 

 middle, and convergent anteriorly, angles well defined, the posterior 

 ones only a little obtuse; punctuation not close, the punctures distant 

 from one to two times their own diameters. Elytra three times as 

 long as the prothorax, slightly widened posteriorly, costae evident, all 

 the intercostal intervals with confused punctuation, the outer ones 

 narrower as usual; other intervals with the fine serial punctures closely 

 placed and forming single regular rows. Metasternum closely punc- 

 tate at sides, abdomen closely quite coarsely punctate; not very much 

 more finely or sparsely so at middle than at sides. Upper tooth of 

 front tibia distinctly nearer the apex than to the base; ungual tooth 

 broad, truncate, much curved, its tip about two-thirds as far from the 

 apex as from the base of the claw. Length 7.6 mm.; width 4.25 mm. 



Hab. — Southern Illinois; a single example in the Bowditch 

 collection. 



The tumid clypeus and strong triangular frontal impression 

 will, if constant, easily identify this species; the faint asneous 

 lustre is also a very exceptional character. The mentum is 

 abnormal for this part of the genus and suggests the form 

 prevailing in levicoxa et seq. 



62. T>. marginicollis n. sp. 



Oblong, slightly or scarcely widened behind, black or dark brown, 

 moderately shining, the elytra plainly, the prothorax visibly alutaceous. 

 Mental declivity narrow, beginning at the anterior fourth, finely 

 margined behind. Clypeus rather broadly sinuato-truncate, the 

 angles rounded, rather densely punctate, suture well defined ; front 

 broadly subconvex, not very closely punctate. Prothorax nearly 

 three-fourths wider than long, sides subparallel in basal half, broadly 

 arcuately convergent in front, hind angles subrectangular, front angles 

 obtuse not prominent, an apical submarginal impressed line, the sides 

 slightly impressed along the margin posteriorly; punctuation fine, the 

 punctures separated by from one to two times their own diameters. 



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



