DESCRIPTIONS OF NEW SPECIES. 177 



small puncture from which proceeds a long white hair. The 

 elytra arc somewhat paler, polished, deeply but sparsely punc- 

 tured, with several rows of very distant larger punctures, from 

 which proceed rather longer flying hairs. 



' AXESTltfUS LEG. 



Eyes large, coarsely granulated, lower lobe extending in front 

 of the antenna3, which are shorter than the body, compressed ser- 

 rate, finely sericeous, 12-jointed, with the 4th joint scarcely shorter 

 than the 3d or 5th, and the 12th elongate oval, half as large as 

 the llth. The geuae are very short, the front quadrate, oblique, 

 concave between the antennal tubercles, otherwise flat and di- 

 vided by a fine transverse suture ; palpi moderate, subequal, last 

 joint thicker, truncate. Prothorax rounded on the sides, longer 

 than wide, somewhat narrowed in front, with two discoidal im- 

 pressions in front of the middle ; sparsely coarsely punctured, 

 with feeble transverse ruga3. Front coxal cavities rounded, the 

 fissure being completely closed. Middle coxal cavities nearly 

 closed externally. Episterna of metathorax narrow, nearly paral- 

 lel, with a small scent pore near the hind coxae. Prosternum 

 narrow, rnesosternum flat, truncate and subemarginate behind, 

 ventral segments nearly equal, 5th broadly emarginate ( ?) at 

 tip. Legs slender, thighs not clavate nor spinose, tibiae slender, 

 hind tarsi with 1st joint scarcely as long as the two following. 



493. A. obsciirus. Piceus, subtiliter cinereo-pubescens, prothorace 

 latitudiue longiore, antice angustato, dorso antice ntrinque impresso, 

 parce vage punctate, et transversiia ruguloso, lateribus sub-angulatim 

 rotundatis ; elytris thorace latioribus postice paulo angustati's,apice bi- 

 spinosis, dense punctulatis, punctis majoribus versus basin intermixes. 

 Long. 30 mm. 



One specimen, from Pope's Expedition, probably from the Rio 

 Grande valley. This genus seems related most nearly to Xestia, 

 but differs from it by the punctulate and finely pubescent surface. 



OSMIDUS LEG. 



Head rather large, eyes large, coarsely granulated, deeply 

 emarginate ; front short, nearly perpendicular, without deep 

 frontal suture, vertex between the antennae not concave ; mandibles 

 small, acute, curved; palpi unequal, last joint triangular obliquely 



