66 H. C. FALL. 



Described from a single example from Jerome, Arizona, 

 submitted by Dr. Fenyes. 



The modification of the outer claw of the middle tarsus is 

 unique in the genus ; it is possibly a sexual character. 



60. D. ainbigua n. sp. 



Oblong ovate, brown or piceous, moderately shining, the elytra 

 distinctly minutely alutaceous, prothorax barely visibly so. Mental 

 declivity beginning about at the anterior two-fifths, hind margin of 

 declivity prominent. Clypeus rather broadly reflexed, arcuately 

 emarginate at middle, the angles rather abruptly rounded in the male, 

 more broadly so in the female. Head densely punctate, clypeal 

 suture distinctly impressed, front broadly feebly evenly convex. Pro- 

 thorax one-half wider than long, widest at about the basal two-fifths, 

 or more rarely at about the middle; sides arcuate posteriorly, con- 

 vergent and nearly straight in front, angles all sharply defined though 

 obtuse; punctuation moderate. Elytra two and one-half times as 

 long as the prothorax, usually evidently wider behind; costs distinct, 

 first intercostal space rather coarsely closely confusedly punctate, 

 second and third irregularly punctate, but less broadly so than the 

 first. Body beneath closely rather coarsely punctate laterally, more 

 sparsely and finely so medially. Pygidium coarsely densely punctate. 

 Upper tooth of front tibiae submedian. Tarsi moderately densely 

 hairy beneath in the male, less evidently so in the female. Ungual 

 tooth subapical, broad and obliquely truncate in the female, less broad 

 and more obtusely rounded at tip in the male, its apex more than 

 twice as distant from the base as from the apex of the claw. Length 

 8-8.6 mm.; width 4.3-4.6 mm. 



Rincon Mountains, southern Arizona; ten examples col- 

 lected by Mr. Beyer. 



The terminal joint of the maxillary palpi is ovate pointed, 

 the cicatrix rather large and deeply impressed, not differing 

 materially in the sexes. A single example from Arizona in the 

 Horn collection which I refer here, has the palpal cicatrix 

 smaller and less deeply impressed, and the clypeal margin 

 somewhat less broadly reflexed. The form of the clypeus is 

 so variable that with certain specimens in hand — more espec- 

 ially males — the species might naturally be referred to the 

 group with angulate clypeus, where the hairy tarsi would 

 associate it with tarsalis, from which, however, it is readily 

 separated by the sexually unmodified terminal joint of the 

 maxillary palpi and by the greater sexual difference in the 

 hairy vestiture of the tarsi. 



