AMERICAN COLEOPTERA. 25 



6. D. arizonica Schf. 



Oblong, a little wider behind, dark brown, moderately shining, 

 prothorax and elytra minutely alutaceous, each elytral puncture 

 bearing a short suberect hair, averaging in length about one-sixth the 

 width of the scutellum. Labrum distinctly arcuate emarginate, the 

 lateral angles a little reflexed and thus more prominent than usual. 

 Mentum with transverse row of five to seven seta;, the accompanying 

 raised line feeble or obsolete. Head and clypeus closely punctate, 

 the latter reflexed, emarginate at middle, angles dentiform, the outer 

 sinuation short but strong; clypeal suture straight, immediately behind 

 it a faint transverse elevation in some specimens. Prothorax a little 

 less than twice as wide as long, widest just behind the middle, sides 

 moderately strongly arcuate, scarcely sinuate anteriorly, but faintly 

 so before the base angles, which are obtuse but defined; front angles 

 evidently acute but not prominent; disk finely, evenly, closely but not 

 densely punctate, the lateral foveae small. Elytra one-half wider and 

 three times as long as the prothorax, punctures much coarser and 

 about equally close, confused between the first costa and the suture, 

 somewhat irregular between the first and second costa?, externally in 

 nearly regular series; first costa distinct, second feeble, all nearly 

 devoid of punctures. Beneath moderately punctate; abdomen with 

 lateral raised line separating the dorsal and ventral portions of the 

 segments; propygidial groove distinct. Front tibia; tridentate, the 

 upper tooth nearer the second than to the base, the middle tooth 

 nearer the apical one. Claws cleft subapically, the lower part a little 

 stouter and obliquely truncate. Length 7-8 mm.; width 3.75-4.2 mm. 



The home of this species is again the mountains of south- 

 eastern Arizona. Schaeffer's type was taken in the Huachuca 

 Mountains, and a specimen taken by Dr. Skinner at the same 

 time bears the label "Carr Canon, August, 1905." A spec- 

 imen in the National Museum collection is from Fort Grant, 

 July 14. 



In form, size, mental, abdominal and ungual characters 

 this species is closely in accord with mimosa. Aside from 

 the non-bilobed labrum, it differs in its shorter elytral pubes- 

 cence, glabrous thorax, and the pronounced disparity in size 

 of the thoracic and elytral punctures; the clypeal angles are 

 more strongly dentiform than in popino. 



7. D. bowditchi n. sp. 



Piceous brown, tarsi paler, upper surface densely finely punctate, 

 with very short pale subrecumbent pubescence. Mentum declivous 

 in front, arcuate ridge and row of setag distinct; labrum concave. 



TRANS. AM. ENT. SOC. XXXV. (4) FEBRUARY, 1909. 



