02 JOHN B. SMITH. 



as in troglodytes. Elytra one-half longer than wide, sides equal, striae deep, 

 punctures evident, intervals narrow, convex. Beneath sternum rugose, abdomen 

 punctured. Length 2 mm. 



Hab.—D&c.^ 



A single specimen only, Coll. Ulke. '' 



A. tenuirostrum n. sp. — Black, very sparsely or not at all pubescent. 

 Head conic, finely punctured and scabrous; eyes small, not at all prominent; an- 

 tennae moderate inserted very close to base of rostrum; basal joint scarcely equal- 

 ling second and third; rostrum elongate, slender in ^ , nearly equalling the body 

 in length, not dilated near base. Thorax wide, sides arquate, densely and grossly 

 punctured, and with a longitudinal fovea near base. Elytra without evident 

 humeri, very slightly ovate, nearly twice as long as wide ; striae deep, punctures 

 evident, intervals narrow and convex, though sometimes but slightly so. Beneath 

 equally punctured. Length 1.5 mm. 



Ifah.—TexAS, Kans., Neb., D. C. 



The relationships of this species have been already mentioned in con- 

 nection with those species which it resembles, and need not be again 

 reviewed here. 



A. attennatllin n. sp. — Black, legs and antennae dark brown, or blackish 

 piceous, but little pubescent. Head as long or longer than wide, densely punctured, 

 eyes distinct, but hardly prominent; rostrum short and stout, sometimes a little 

 dilated near base. Antennae short and stout, basal joint but little exceeding sec- 

 ond in length, but shorter; others (except club) moniliform. Thorax cylindric, 

 hardly wider at base, sides sub-arquate ; densely punctured, without impressed 

 line, but with a shallow, indistinct depression at base. Elytra narrow, sides par- 

 allel, striae wide, distinctly punctured, intervals convex and narrow, but little 

 wider than striae. Beneath densely punctate. Length I.f)mni. 



Ilab. — Kansas. 



This species enjoys an unusual range of variation ; there are but few 

 specimens, and no two are like ; the legs vary in color ; the rostrum varies 

 in length, and is sometimes distinctly dilated, and sometimes equal through- 

 out ; the head varies in width, and the eyes seem, in one instance, dis- 

 tinctly prominent; withal the species has a peculiar sordid appearance, 

 and the specimens are remarkably equal in size, so that in connection with 

 its somewhat depressed form it may be easily recognized. 



Section V. 



The species of this section agree in the narrowed thorax sinuate at 

 base (Plate III, Fig. 16), and except for the first species in the robust 

 depressed form. They are easily distinguished, though rostrum nigrum 

 Siw6. patruele enjoy a very large range of variation, and extremes of each 

 may, for an instant, create a doubt. 



They are separated as follows : 



