DESCRIPTIONS OP NEW SPECIES. 169 



ASEMUM ESCH. 



482. A. liitidllltt. Atrum uitidum, breviter fusco-pubescens, proth<5^ 

 race latitudine breviore, lateribus valde rotundatis, disco subtiliter 

 minus dense punctate, ante basin transversim, disco autem vix con- 

 spicue impresso ; elytris subtiliter dense punctulatis, obsolete striatis. 

 Long. 17.5 mm. 



One male, Oregon, Lord Walsingham. This species is larger, 

 and somewhat more robust than either moestum or atrum, and is 

 easily known by the surface being lustrous instead of opaque, 

 and by the prothorax being much less densely punctured. The 

 antennae of the male are half as long as the body and stouter than 

 in the other species, especially towards the base. The eyes are 

 of the same form, and somewhat hairy as in the other species. 



Asemum asperum Lee. belongs properly to Nothorhina, a genus 

 easily distinguished by the prosternum being more deeply emar- 

 ginate in front, pronotum longitudinally excavated in the middle, 

 and rough with elevated points at the sides. 



CUIOCEPHAtUS MULS. 



" The vaguely described North American species introduced by 

 Kirby. Randall, and Leconte," do not seem to have merited the 

 recognition of Sehiodte,* and I have therefore constructed the 

 following table, which may assist in the determination of speci- 

 mens. 



, Some of the characters used by Prof. Schiodte for the separa- 

 tion of the two Danish species, become, in our more extensive 

 fauna, of importance in defining groups rather than individual 

 species, which may accordingly be divided as follows : 



A. 3d joint of hind tarsi emarginate for half its length, the 4th joint con- 

 I sequently extending as far as the lobes of the 3d joint, elytra 



finely punctured : 



Antennae and legs very slender, hind tarsi with the 3d joint twice as 

 long as wide; body more elongate, prothorax not wider than long, 

 rounded on the sides, slightly roughened with elevated points. 



1. PKODUCTUS Lee. 



Antenna and legs 'less slender, body less elongate, prothorax wider than 

 long : 



* Annals and Magazine of Nat. History, 3d ser. xv. 233. (March, 1865.) 

 12 May, 1873. 



