460 Goleopterological Notices, VI. 



1. P. ^raiidiceps Lee. — Proc. Acad. Nat. Sci., Phila., 1866, p. 355. 



Parallel, moderatel}^ convex, highly- polished, }3lack, the elytra 

 piceoiis-black ; femora and tarsi dark rufo-ferruorinous, the tibia? 

 infuscate except toward base; antennas piceous-black, testaceous 

 toward base ; pubescence very sparse, subcinereous and suberect, 

 interspersed throughout the upper surface with numerous xery 

 long, erect and bristling lilack setre. Head large, about as wide 

 as the prothorax in the male, polished, though ver}' obsoletely 

 reticulate, convex, minutely and sparsely punctate; frontal im- 

 pressions very large, deep and remotel}' separated; eyes convex 

 and prominent, the sides of the neck strongly convergent behind 

 them ; antennae well developed, nearly- one-half longer than the pro- 

 thorax, feebly serrate, joints six to ten subsimilar, feebly transverse 

 and but slightlv incrassate. Prothorax three-fifths wider than 

 long, the sides strongly rounded just behind the middle, equallv 

 convergent and nearly straight thence to apex and base, all the 

 angles ol)tuse and l)lunt but traceable ; apex and base equal and 

 equally arcuato-truncate; disk minutely and remotely punctate, 

 perfectly' smooth and polished to the extreme edges. Elytra but 

 slightl}' more than one-half longer than wide, equal in width to 

 the prothorax, parallel and straight at the sides, evenly and not 

 ver}' obtusely rounded at apex, rather coarsely and sparsely punc- 

 tate. Length 3.7 mm.; width 1.3 mm. 



California. A remarkably distinct species, descril)ed above 

 from the male. I have not seen the female, which ma}^ differ 

 greatly in the size of the head. The male sexual characters at the 

 abdominal apex are very simple, the fifth segment being rather 

 narrowh' truncate at tip. 



ErDASYTES n. gen. 



The three species which it seems advisable to separate from 

 Tricliochrous under this name, do not form a very distinctly 

 characterized genus, and differ only in having the epipleura? 

 rather wide, flat and horizontal, and the lateral margins of the 

 el3tra narrowly- reflexed, this being a consequence of the epipleu- 

 ral structure. Still, if we regard epipleural structure as one of 

 the few important taxonomic elements in this tribe, it will cer- 

 tainl}' be necessary to form of these species a genus different from 

 Tricliochrous, and, after all, when we compare the structure of 



