NOKl'H AMERICAN COLEOPTKRA. 127 



constriction. Female: shining throughout, very finely and remotely punctulate, 

 more distinctly punctured, scaly aiul substriate near the base, basal tufts and 

 constriction very distinct. AntennsR slender, inserted two-fifths ( ^ ) from the 

 apex, or one-third ( 9 ) from the base, first joint of funicle nearly one half longer 

 than the second ; dava short, ovoid, basal joint glabrous, remainder densely 

 pubescent. Head black, shining, scarcely punctured. Prothorax very little 

 wider than long, narrowed in front and rather widely constricted behind the 

 apical margin, rather broadly rounded on the sides, a little wider at middle than 

 at the base ; prothoracic lobes distinct ; surface very densely and finely punctured, 

 median smooth line variable in extent, but constant. Elytra about one fourth 

 wider at the base than the prothorax and about twice as long as wide; sides 

 nearly straight for one-half their length, thence gradually rounded to the apex, 

 iiidistinctly but broadly impressed behind the humeri, the latter rounded ; striae 

 distinct, impressed, distantly punctured ; interspaces flat, about equal in width, 

 suberect setae short, but distinct. Prosternuni moderately long in front of the 

 coxte, not or feebly impressed transversely with indistinct autecoxal ridges. 

 Legs rufous, not densely scaly; tibiso slender, posterior dilated at the apex, 

 apical hooks distinct; tarsi slender, first joint one-half longer than wide; claws 

 moderately long, connate in their basal third. Length 3.5—3.75 mm. ; 0.14— 

 0.15 inch. 



Hab. — Kansas, New Mexico, Arizona, California. 



Two specimens in my collection from Kansas differ from the above 

 description by their larger size (4.0 mm.), more transverse prothorax 

 and yellowish scales, characters not sufficient to be considered of 

 specific importance. Another specimen from California in Mr. 

 Ulke's collection has the prothorax bisinuate at base, and the second, 

 fourth and sixth elytral interspaces widened towards the base. 1 

 retain it here until more material shall prove the constancy of these 

 characters. 



D. sordidus Lee— Very closely related to constrictus, from which it differs 

 rather by an assemblage of characters than by any constant anatomical differ- 

 ence. Oval, piceous, elytra, beak and legs rufous. Beak a little less slender and 

 more coarsely punctured in the male; first joint of funicle more than one-half 

 longer than the second. Head less shining, with scattered punctures. Pro- 

 thorax distinctly wider than long, more narrowed in front, and a little more 

 strongly rounded on the sides. Elytra less elo!igate, a trifle more rounded on 

 the sides and not impressed behind the humeri. Prosternum more deeply emar- 

 ginate, deeply impressed transversely. The scaly vestiture is more easily 

 abraded, more dense on the upper surface, the scales a trifle larger. The elytral 

 strire without evident punctures. Length 3.4 mm.; 0.14 inch. 



Hab. — New Mexico, Arizona, Texas, California. 



D. liuinili!i> n. sp. — Oblong-oval, moderately convex, black, antcnnie and 

 legs rufous, scaly vestiture rather dense, consisting of uniform, moderately 

 large, grayish white scales. Beak (male) moderate, as long as head and protho- 

 rax, of equal thickness throughout when viewed laterally, widened near the 



TRANS. AM. ENT. SOC. XXI. APEIL, 1894. 



