DYNASTIN/E 125 



small, the clypeal suture completely obliterated, at least medially, 

 except in some Sonoran species, the men turn rather convex, bristling 

 with long stiff hairs, at least at the sides and sometimes throughout, 

 and the mandibles are notably slender, not hidden under the clypeus, 

 except when closed, and with the apex more or less acute and slightly 

 turned outward. The sides of the elytra in the female are feebly 

 or very moderately modified, though more so than in the preceding 

 genus, and the upper surface is less convex than in any of the pre- 

 ceding genera; the elytra are very feebly and minutely sculptured 

 or smooth, except in humeralis, where the punctures of the feebly 

 impressed, irregular series are notably coarse and impressed. The 

 legs are moderately slender, the hind tarsi long and filiform. Be- 

 sides the tropical scarab ceoides, erythrodera, ustulata and (Eqiiata, 

 which I have before me, this genus will include the following Sonoran 

 species : 



Tibiae and tarsi black or blackish. Body oblong-oval, evidently inflated 

 posteriorly, deep black, very shining, the basal and lateral edges of 

 the pronotum enlarged at apex into a subquadrate spot and the 

 elytral suture and two or three narrow feeble discal streaks on 

 each elytron testaceous; under surface, pygidium and femora flavate, 

 the metasternum and abdomen, excepting the last segment, black; 

 head not quite half as wide as the prothorax, deep black throughout 

 and in great part alutaceous, sparsely and very finely punctate, the 

 clypeus large, evenly parabolic, one-half wider than long, broadly, 

 feebly impressed and rather more closely punctate throughout the 

 periphery, the edges finely beaded and slightly reflexed, more so and 

 thicker at apex; suture nearly straight, obsolete medially, deep at 

 each side; antennal club three-fourths as long as the stem; prothorax 

 three-fourths wider than long and four-fifths as wide as the elytra, 

 the sides rounded rather more prominently at the middle; apical 

 angles very acute and sharp, the basal obtuse and moderately 

 rounded; basal bead very evident near the sides; surface moderately 

 convex, very minutely, sparsely punctate throughout; base broadly 

 arcuate, not definitely lobed; scutellum moderate, ogival, finely, 

 sparsely punctate, black, pallid near the margins; elytra a fifth 

 longer than wide, broadly and obtusely rounded at apex, almost 

 smooth, the minute punctures barely visible but sometimes with 

 three feeble geminate series rather evident, the surfaces of which 

 form the imperfect pallid streaks; pygidium distinctly but sparsely, 

 unevenly punctate and with long sparse erect hairs; sterna and 

 middle femora with rather abundant long fine pale hair; abdomen, 

 excepting the transverse series, subimpunctate, punctured laterally; 

 hind tarsi (cf ) much longer than the tibiae. Length (cf) 17.0-19.5 

 mm.; width 9.6-11.0 mm. Mexico (Durango City), YVickham. 



*durangoana n. sp. 



