5*70 CoIeo2)terological Notices, VI. 



spicnous, Avithout trace of erect hairs. Head two-thirds as wide as the pro- 

 thorax, strongly reticulate, smooth near the apex, obsoletely punctulate; epi- 

 stonia short, the labrum small and transverse, strongly rounded, piceous-black ; 

 mandibles stout, pale testaceous throughout except at the tip; eyes small and 

 rather prominent; antennai short, slender, much longer than the prothorax, 

 gradually and sensibly incrassate toward tip, the penultimate joints trans- 

 verse, fifth not noticeably dilated. Prothorax three-fifths wider than long, the 

 sides strongly rounded at the base, thence distinctly convergent, gradually be- 

 coming almost straight to the apex, which is arcuato- truncate and narrower 

 than the base, the latter broadly arcuate ; angles obtuse ; disk obsoletely retic- 

 ulate, more strongly rugulose toward the sides, minutely and sparsely punc- 

 tate, the submarginal line distinct. Elytra one-half longer than wide, three- 

 fifths wider than the prothorax, the sides pai'allel and feebly arcuate; apex 

 subparabolic ; disk finely but strongly, densely' punctate. Under surface dis- 

 tinctly but only moderatelj' densely cinereo-pubescent, the legs slender. 

 Length 1.65-1.8 mm.; width 0.75-0.85 mm. 



Arizona (near the Caiion of the Colorado). 



The female is desci ibed above and this sex has the sides of the 

 fifth ventral convergent, the apex being narrowly' areuato-trun- 

 cate. The male is larger than the female and has the prothorax 

 less transverse, with the sides arcuate and onh- slightly conver- 

 gent, the apex of the fifth ventral only a little more broadly trun- 

 cate than in the female. Five specimens recentl}^ taken by Dr. 

 T. Mitchell Prudden. 



8. D. siiboTali§ n. sp. — Stout, oblong, suboval, convex, black, the legs 

 slightly piceous; antenute black ; pubescence coarse, dense, closely decumbent 

 and very conspicuous, cinereous-white, with small, widely and unevenly dis- 

 persed spots in which the hairs become dark brown in color though otherwise 

 not different; erect hairs wanting. Head rather more than two-thirds as wide 

 as the prothorax, transverse, reticulate, scarcely visibly punctate, the impres- 

 sions oljsolete; epistoma short, the labrum short and strongly rounded, both 

 ruf o-piceous ; mandibles pale; eyes small and rather prominent, basal; an- 

 tennae short, slender, distinctly incrassate toward tip, very much longer than 

 the prothorax, the penultimate joints transverse. Prothorax short and broad, 

 five-sixths wider than long, the sides rounded at the base, convergent and 

 straighter thence to the apex, the latter much narrower than the base, both 

 feebly arcuate ; angles obtuse; punctures very small, sparse, the surface more 

 rugose laterally with the submarginal line distinct. Elytra short, scarcely 

 one-half longer than wide, not quite one-third wider than the prothorax, the 

 sides parallel, feebly arcuate except near the base; apex not very broadly and 

 almost circularly rounded; disk finely and moderately closely punctate. 

 Under surface shining, thinl}' and not very conspicuously cinereo-pubescent. 

 Length 1.45-1.55 mm.; width 0.6-0.7 mm. 



Arizona ; Texas. 



