58 H. C. FALL. 



head rather densely punctate, without evident post-clypeal convexity 

 or frontal impressions. Prothorax one-half wider than long, sides 

 strongly rounded at middle, distinctly sinuate before and behind; front 

 angles as viewed from above obtuse but well defined, not at all pro- 

 duced; hind angles nearly right; all the lateral fovea? evident, punc- 

 tuation fine and rather sparse, the punctures distant by about their 

 own diameters laterally, finer and separated by from two to three 

 times their own diameters at middle. Elytra two and one-half times 

 as long as the prothorax, widest at middle, sides very broadly arcuate; 

 costas not defined; punctures moderately coarse and confused in the 

 subsutural interspace, and somewhat irregular in the humeral inter- 

 space, otherwise arranged in regular series. Propygidial marginal 

 groove feeble. Punctuation beneath very sparse and fine at middle, 

 closer but neither coarse nor dense laterally. Teeth of anterior tibiae 

 obtuse, the upper one median in position or possibly very slightly 

 nearer the base than the apex. Ungual tooth median in position, very 

 nearly as in brevidens. Length 11.2-12.5 mm.; width 5.6-6.2 mm. 



Phoenix, Arizona. Two examples sent by Mr. Liebeck. 

 This species is closely related to brevidens, though more sim- 

 ilar in appearance to the following species {illustris). It 

 agrees with brevidens in ungual formation and in the elytral 

 punctuation, but in the latter species the sides of the thorax 

 are not perceptibly sinuate either in front or behind. The 

 head in brevidens is but slightly more than half as wide as 

 the thorax, and the impression of the terminal joint of the 

 maxillary palpus is of normal size and does not extend beyond 

 the middle. In fossipalpa the head is about three-fifths as 

 wide as the thorax and the impression of the terminal palpal 

 joint is deeply eroded and extends almost from base to apex. 

 The present species is very similar in size and form to illustris, 

 and it is not impossible that it may be the female of that 

 species, which is known only by the male. The difference in 

 elytral punctuation and position of ungual tooth are, how- 

 ever, not known to be sexual elsewhere, and it would be un- 

 warranted to assume such relation without absolute proof. 



49. D. illustris n. sp. 



Oblong, moderately robust, not wider behind, dark brown, mod- 

 erately shining, elytra minutely alutaceous. Mentum flat posteriorly, 

 declivous from anterior third, declivity strongly margined. Clypeal 

 margin rather feebly sinuate at middle, rounded at sides, clypeal 

 suture distinct from side to side, finely impressed; front without post- 



