NATURAL SCIENCES OF PHILADELPHIA. 369 



*** Trunk black bronzed, or piceous bronzed; tip of abdomen reddish- 

 brown. 



7-25— 8 mm. Oval, less elongated, black, shining', but not polished, very 

 minutelj- punctulate or rugose ; margins bronzed ; tips of elytra more concave 

 than usual; punctures of rows well marked, approximate. (Easily distin- 

 guished by the fine punctuation of the upper surface and the bronzed color be- 

 neath.) 12. a ffin is Aub^. 



A— b. 



a. Body oval in form, regularly convex. 



* Anterior margin of mesosternum regular in form. 



5"25 — 575 mm. Oval, equally attenuated at each end, black, shining, high- 

 ly polished ; margins and sides bronzed ; elytra with rows of deeply impressed, 

 bronzed, coarse punctures, so approximated that the outer striae appear im- 

 pressed ; tip broadly subtruncate, feebly rounded; outer angle distinct. 



13. parous Sa^/. 



5-5 — 6-5 mm. Oval more elongate, nearly equally narrowed before and be- 

 hind, black, shining, highly polished ; margins and sides bronzed ; elytral rows 

 composed of approximate bronzed punctures, the outer ones a little stronger 

 than the inner; tip of elytra strongly rounded, outer angle not distinct ; last 

 ventral segment sometimes dark reddish-brown ; sides of prothorax slightly 

 rounded. 



rt. Apical oval of punctured curve of elytra composed of large, coarse 



punctures. 

 0. Apical oval curve composed of very fine punctures, almost obliterated ; 

 middle and hind legs darker than usual 14. picipes Auh4. 



5-25 mm. Smaller and a little narrower than picipes, of a less shining 

 black, feebly bronzed, more brilliantly at the margins and sides ; elytral rows 

 composed of less approximate bronzed punctures, the outer ones a little 

 stronger than the inner; tip of elytra strongly rounded ; outer angle not dis- 

 tinct; apical oval curve composed of distant, well marked punctures; middle 

 and hind legs darker than usual 15. o p a c u s Sahib. 



7 mm. Larger and a little stouter, black, highly polished and with bluish 

 reflections ; margins and sides bronzed ; elytral rows composed of fine bronzed, 

 very closely approximated punctures, outer rows distinctly impressed ; tip of 

 elytra broadly truncate, feebly rounded ; outer angle distinct, though obtuse 

 and rounded; legs ferruginous, under surface black ; last ventral segment verj' 

 dark brown t 16. boreal is Aub^. 



6 mm. Of the same form, color and sculpture as the preceding, but still more 

 highly polished; the elytra are still less rounded at tip, and the punctures of 

 the rows are less fine and less approximate, and the outer rows, though a little 

 stronger, are not impressed; the under surface is black, the last ventral seg- 

 ment ferruginous in one, but very dark brown in two other specimens ; the legs 

 ferruginous 17. pernitidus, n. sp. 



6 — 7 mm. Of the size and form as b o r e a 1 i s, but above black, less 

 highly polished and not at all bronzed ; tip of elytra more rounded, with the 

 outer angle less distinct; the rows are composed of small but less approximate 

 punctures, and the outer rows, though stronger, are not impressed; the under 

 surface is black, feebly bronzed ; the legs ferruginous, and the last ventral 

 segment dark brown 18. lugens Zim. 



5 — 6 mm. Smaller, more elongate, black bronzed both above and beneath ; 

 upper surface not highly polished ; elytra with the tip broadly but not strong- 

 ly rounded ; outer angle not distinct ; rows composed of not very fine, less 

 approximate punctures, outer rows but little stronger than the inner ones ; legs 

 and last ventral segment ferruginous. (Resembles in form, size and sculpture 

 G. o p a c u s, but is more bronzed above and beneath, the legs and last ventral 

 segment are paler and the inferior pair of eyes are larger.... 19. a n a 1 i s Say. 



1868.] 



