AMERICAN COLEOPTERA. 37 



distinct, the interspaces wide and closely, confusedly, more coarsely 

 punctate than the thorax; the first intercostal area nearly or quite 

 four times as wide as the sutural interspace. Body beneath sparsely 

 punctate at middle, closely so laterally. Tibial teeth small and often 

 obtuse, the upper one nearer the apical one than to the base. Ungual 

 tooth submedian, acute, scarcely obliquely truncate, its apex about 

 four-fifths as far from the base as from the tip of the claw. Length 

 12.5-13.8 mm.; width 6.6-7.2 mm. 



Most of the specimens seen were taken by Barber and 

 Schwarz at Williams, Arizona. Also taken by Dr. Skinner 

 in the Huachuca Mountains, Arizona. 



The so-called elytral costae are, I think, rather better de- 

 fined than in any other species of the genus known to me. 



22. D. brevicollis Lee. 



Moderately elongate, scarcely wider behind, ferruginous to dark 

 castaneous, rarely nearly black, shining, head and prothorax polished, 

 elytra with minute alutaceous sculpture visible only on close exam- 

 ination. Mentum broadly concave anteriorly, nearly as in costulata 

 Front with a median impression or two more or less confluent impres- 

 sions behind an evident post-clypeal convexity; punctuation not 

 dense, the punctures separated by their own diameters or rather 

 more, the clypeal suture smoother; clypeus closely punctate, margin 

 sinuate at middle with rounded angles. Prothorax twice or slightly 

 more than twice as wide as long, sides subparallel or very slightly 

 convergent behind in basal two-fifths, arcuately narrowed anteriorly; 

 angles rather sharply defined, all impressed; disk rather sparsely not 

 coarsely punctate, punctures but little closer at sides, where they are 

 separated on an average by their own diameters. Elytra not or 

 scarcely wider behind, fully two-fifths longer than wide and nearly 

 or quite four times as long as the prothorax; costae distinctly defined, 

 intercostas rather wide, the first about three times as wide as the 

 sutural interval; all confusedly moderately numerously punctate, the 

 punctures distinctly coarser than those of the prothorax; narrow 

 intervals with single rows of rather distant fine punctures. Pygidium 

 moderately coarsely punctate; metasternum closely punctured at sides 

 and in front, nearly smooth at middle; ventral segments sparsely 

 finely punctured at middle, more numerously and coarsely so laterally, 

 especially posteriorly. Upper tooth of front tibiae about two-thirds 

 as far from the apex as from the base. Ungual tooth moderately 

 large and acute, slightly post-median, its apex not distinctly obliquely 

 truncate, the tip of the tooth a little more distant from the base than 

 from the end of the claw. Length 12-14 mm.; width 6f-7£ mm. 



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



