68 Mr. G. C. Champion's Revision of the Mexican 



of the prothorax, are sharply margined with pale testaceous ; 

 and the legs are more elongate, the posterior tibiae much 

 straighter. 



35. Attains laeviusculus, n. sp. 



(J. Rather short, shining; black, the basal five joints of the 

 antennae, the bases of the tibiae and tarsi, and the anterior femora, 

 more or less testaceous; finely, sparsely pubescent. Head short, 

 broad, very sparsely, obsoletely punctate; antennae rather short, 

 distinctly serrate, joints 6-10 about as broad as long. Prothorax 

 convex, transverse, obsoletely piinctate. Elytra a little wider 

 than the prothorax at the base, dilated posteriorly, somewhat 

 rugulose and obsoletely punctate. Anterior tarsi with the pro- 

 longed upper portion of joint 2 about reaching the apex of 3. 

 Posterior tibiae bowed. 



Length 2 mm. 



Hab. Mexico, Atoyac in Vera Cruz {H. H. Smith). 



One male. Distinguishable amongst its alhes by the 

 shining, comparatively smooth, black upper surface, con- 

 vex prothorax and partly dark legs. The antennae {(^) 

 are much shorter than in the same sex of A. nigroaeneus, 

 A. nigritulus, etc. 



36. Attains sulcifrons, n. sp. 



$. Narrow, moderately elongate, inflated posteriorly, very 

 shining; black, with a faint brassy lustre, the labrum, and [the 

 basal joints of the antennae in part, obscure ferruginous, the legs 

 wholly piceous; finely pubescent, with intermixed long, suberect 

 hairs. Head short, broad, obsoletely punctulate, canaliculate on 

 the vertex and feebly bifoveate in front, the eyes very prominent ; 

 antennae short, joints 6-10 transverse. Prothorax transverse, 

 not very convex, feebly roimded at the sides, polished, obsoletely 

 punctulate. Elytra wider than the prothorax, moderately long> 

 rugulose, sparsely pimctulate. Legs very slender; posterior 

 femora strongly bowed. 



Length 2i mm. 



Hab. Mexico, Cordova (Hoge). 



One specimen. Extremely hke A. nigritulus, Gorh. ($), 

 with which it was first confused by me, but separable 

 from that species by the much shorter head (as seen 

 detached from the prothorax), the canahculate vertex, 

 the shorter antennae, joints 6-10 of which are transverse, 



