NORTH AMKRICAX COLKOPTERA. 53 



with a distinct impressed line. Elytra almost hemispherical in form; striae deep, 

 punctures large, interspaces convex and narrow. Beneath denselj' punctured. 

 Length I mm. 



If„h.—F\ii., Texas, Nt4>. 



A. brevicolle n. sp. — Black, often slightly aeneous. Head longer than wide, 

 densely scabrous, and canaliculate hetween the eyes; the latter small and not 

 prominent; basal joint of antennae equalling second and third; the two latter 

 subequal. Thorax as wide as long, sides equal, moderately punctured, impressed 

 line distinct. Elytra as wide as long: little wider at middle; humeri broad, 

 prominent ; striae tine, punctures fine, sometimes scarcely evident ; intervals wide, 

 flat, and with tine punctures. Beneath moderately punctured. Length L5 — 2 mm. 



Hffb. — Cal., Texas, Ariz. 



Easily recognized by the small head and thorax, and the very large 

 obese body. It seems thus far limited to the Southwest, but is not un- 

 common there. 



A. typicnm n. sp. — Black, form robust. Head elongate, moderately punc- 

 tuate: eyes not at all prominent; antennae moderate; basal Joint longest, and 

 rather slender, inserted near to base of rostrum. Thorax short, narrow; sides 

 parallel, equal, moderately, or rather coarsely punctured, with distinct dorsal line. 

 Elytra almost as broadas long, subglobose: humeri not greatly prominent; striae 

 deep, distinct; punctures not distinctly evident: intervals rather wide, strongly 

 convex. Beneath denselv scabrous and punctured. Length I — 1.5 mm. 



//a/>.— Cal. 



Rather an obscure species, somewhat smaller than it.s allies, and some- 

 what diiFering- in form. It seems not uncommon. 



A. abdomiliale n. sp. — Black, form very robust. Head much broader than 

 long; very densely and coarsely punctured; eyes prominent, large: a distinct 

 sulcus from base of rostrum to middle, where it is distinctly dilated : antennae 

 short and stout; basarjoint half exceeding second, and with it forming one-third 

 the whole length of the member. Thorax very short and narrow; very grossly 

 and densely punctured, with a larger foveate puncture near base. Body very con- 

 vex, almost globose ; elytra scarcely longer than wide, widest behind middle ; striae 

 wide, jiunctures deep and close; intervals modierate, but little wider than striae. 

 Beneath very den.sely, but ndt. so grossly punctured. Length 2 mm. 



Ilnh.—knz., Ill, D. C. 



Another obese species, readily distinguished by the very coarse punc- 

 tuation. 



A. aiiteiiiiatuin n. sp. — Black, more elongate than the preceding. Head 

 transverse, rather tinely punctured, with a more or less distinct impression on 

 front; eyes not prominent; antennae moderate: basal joint not elongate, inserted 

 two-fifths from base of rostrum. Thorax, sides straight, about as long as wide, 

 widest at base; punctuation rather sparse and fine; dorsal line more or less dis- 

 tinct, sometimes obsolete. Elytra moderately ovate, not obese ; striae distinct, 

 punctures large ; intervals wiiie. and somewhat convex : finely scabrous. Beneath 

 finely and sparsely punctured. Length 2 mm. 



l'/„h.—CAl. Ariz. 



(14) 



