62 H. C. FALL. 



coarsely punctate throughout, more closely at sides. Upper tooth of 

 front tibiae obviously nearer the base than the apex; ungual tooth 

 strongly post-median, its tip about twice as distant from the base as 

 from the apex of the claw. Length 10-11 mm.; width 5.3-5.8 mm. 



The two type specimens are from Texas, collected by Hal- 

 deman. A single specimen, also from Texas, is in the Na- 

 tional Museum collection. 



The most conspicuous feature of this species is the unusually 

 coarse and dense punctuation of the entire upper surface. 

 The metasternum is also more coarsely punctate at middle 

 than in any of the allied forms. The ungual tooth is so 

 strongly post-median that the species might with about equal 

 propriety be included under the subsequent caption, " Ungual 

 tooth apical or subapical, etc." in which case the coarse and 

 dense sculpture would still separate it from any species there 

 given. 



54. D. corvina Lee. 



Robust, rather strongly convex, oblong oval, not wider behind, 

 black, shining, elytra minutely alutaceous, prothorax scarcely visibly 

 so; surface throughout minutely punctulate in addition to the usual 

 punctuation. Mentum with acutely margined declivity in front. 

 Clypeus broadly rotundate, sometimes with slight trace of median 

 sinuation; clypeal suture moderately impressed; front nearly evenly 

 subconvex, punctuation of head moderately coarse, dense. Prothorax 

 three-fifths wider than long, widest at middle, sides broadly evenly 

 arcuate, base a little wider than the apex; punctuation coarse, dense 

 at sides, the punctures well separated at middle; a somewhat vague 

 median impressed line; the angles obtuse. Elytra not very much 

 wider than the prothorax and a little less than two and one-half times 

 as long, nearly one-fourth longer than wide; costae indistinct, recogniz- 

 able only by the rows of fine interstitial punctures; punctuation coarse, 

 disposed in regular rows except in the broad subsutural interspace. 

 Pygidium very coarsely subrugosely punctate. Punctuation below 

 about as usual. Legs stout, upper tooth of front tibiae submedian, or 

 perhaps a trifle nearer the base than the apex. Ungual tooth post- 

 median, obliquely truncate, its tip two-thirds as distant from the apex 

 as from the base of the claw. Length 12-13 mm.; width 6.5-7.2 mm. 



All specimens seen are from the vicinity of Yuma, Arizona. 



The large size, convex parallel form, shining black color, 

 the regular arrangement of elytral punctures exterior to the 

 subsutural interspace, and the median impressed pronotal 



