46 JOHN B. SMITH. 



Form slender, elongate, 2 mm Floridannm. 



Form robust, elytra broadly oval, widest behind middle, punctures of striae 



distinct, thorax elongate, 2-2.5 mm obesiim. 



As before, punctures of striae obsolete, color brassy or bronze black, 1.5 mm. 



parvuliini. 

 Thorax shorter, elytra as wide at humeri as at middle, else as in obestim, 



color black, 1-2.5 mm atripes. 



Eyes not at all prominent; head narrow. 



Elytral striae obsoletely punctured, intervals wide, flat, form moderate, 



2-2.5 mm cribricollc. 



Elytral striae very fine, intervals wider, form more robust, antennae and 



legs piceous, 3 mm uielaiiarium. 



Elytral striae evidently punctured, intervals convex, 1 mm...iiiinutuni. 

 Eostrum dilated- near base. 

 Head narrow, elongate, eyes small, not at all prominent. 

 Legs pale or piceous, thorax much longer than wide, 2 mm. 



peiisylvanicum. 

 Legs black, thorax shorter, body more robust. 



Striae of elytra distinctly punctured, intervals narrow, 2 mm. 



opacicolle. 

 Striae of elytra fine, obsoletely punctured, intervals wide, 1 — 1.5 mm. 



ocdorliynchum. 

 Head wider, eyes moderate, somewhat prominent. 



Slender, small; thorax cyindric, 1 mm Texanuni. 



More robust; thorax slightly widening at middle, 1.5 — 2 mm. 



ellipticnni. 



A. protensum Lee. Pac. R. R. Expl. and Surv. Ins. 53. — Black. Head 

 elongate, confluontly punctured ; eyes not at all prominent ; rostrum slender, elon- 

 gate, slightly dilated near middle. Antennae elongate, basal joint as long as 

 second and third, the latter shorter than second. Thorax elongate, but moder- 

 ately wide, cylindric, slightly wider at middle, coarsely punctured and without 

 evident dorsal line. Elytra regularly oval, narrow, surface scabrous; striae rather 

 superficial, punctures deep, rather distinct, intervals wide and flat. Beneath 

 coarsely punctured. Length 2.5 mm. 

 Hah. — California. 



This is the only species in this section which lacks humeri and has the 

 rostrum at all dilated. Only a few specimens are known and they all 

 have a peculiar sordid appearance caused by the rugose and scabrous sur- 

 face, which in connection with the structural character renders them 

 easily recognizable. The 9 s usually have rather an elongate rostrum, 

 and it is possible to confound them at first sight with large specimens of 

 9 tenuirosfrmn, but the latter belongs to an entirely different § of the 

 genus by structure. 



A. pnnctinasum n. sp. — Black. Head punctured, eyes not prominent; 

 rostrum unusually stout and short in % , equally stout but longer in 9 • Thorax 

 as usual in this g in the %, but somewhat wider, with sides more rounded in 9^ 



