24 H. C. FALL. 



sculpture of prothorax less evident and sometimes nearly or quite 

 absent. Elevated line separating ventral and dorsal segments distinct 

 basally, disappearing on the last two segments. Propygidial apical 

 groove feeble. Length 7-10 mm. 



Specimens at hand are all from southern Arizona (Tucson, 

 Nogales, Florence, Oracle, Santa Rita and Huachaca Moun- 

 tains), except two in the Horn collection which bear label 

 "N. M." 



Very similar to mimosce but larger and apparently always of 

 some shade of reddish brown in color, while the large majority 

 of mimosce are blackish. The prominent clypeal angles and 

 less dense punctuation are also fairly characteristic. From 

 all our other hairy species, except mimosa and cribrulosa, 

 popino is at once distinguished by the bilobed labrum. 



5. D. cribrulosa Lee. 



Brown, sparsely hairy; labrum deeply impressed. Mentum feebly 

 declivous in front from about the apical two-fifths, posterior margin of 

 declivity slightly prominent and with the usual setae. Clypeus 

 squarely truncate in front with faint trace of median sinuation, not 

 visibly sinuate at sides. Head densely punctate; prothorax quite 

 coarsely and sparsely so, the punctures separated by two or three 

 times their own diameters at middle, and by their own diameters at 

 sides. Elytra coarsely rather closely punctate, the punctures of the 

 costa? also strong and close. Punctuation beneath rather sparse. 

 Length 8 mm.; width 4.5 mm. 



Habitat. — " Frontera on the Rio Grande." 



The unique type in the LeConte collection evidently repre- 

 sents a hairy species, though pretty completely denuded. 

 The color, form, size and sculpture strongly suggest popino, 

 with which species it also appears to agree in having the 

 dorsal and ventral portions of the first three abdominal seg- 

 ments separated by a raised line; the clypeus differs from 

 popino in being squarely truncate, the angles not at all dent- 

 iform; the thoracic punctuation is, I think, a little coarser and 

 sparser, and the pubescence appears to be less plentiful, 

 though of this it is not possible to speak with certainty. None 

 of these characters are of much weight and it is not unlikely 

 that the two are forms of a single species. 



