134 Journal New York Ent. Soc. [Voi. ii. 



Metallic green or bronze with testaceous border and markings ; the 



testaceous color sometimes predominating. 

 Usually more bronze than testaceous ; thorax with side margins 



only testaceous atnericanutti. 



Tiiorax with anterior margin as well as sides testaceous . tessellatum. 



O. labiatum Fixbr. — Dark brown or black ; thorax and elytra 

 with pale testaceous border ; strice and punctures of elytra becom- 

 ing obliterated at sides and apex ; tliorax with scattered, coarse 

 punctures. Underside pitchy, ai>ex of abdomen paler. Length, 

 ,24 inch = 6 mm. 



Habitat, Middle and Southern States. 



O. nitidum Lee. — Allied to the preceding, but is distinctly 

 pimctured at the sides and is metallic green with the testaceous 

 bonier of the elytra broader. Length, .20 — .24 inch. = 5 — 6 mm. 



Habitat, Illinois to Texas. 



O. robustum Horn. — Pale testaceous ; elytra with broken 

 green transverse markings ; thorax has a narrow transverse metallic 

 green band, extending forward and backward at the middle, and 

 an oval spot on each side between the oand and the margin ; elytra 

 with strh\i of coarse distant punctures. L^nderside testaceous 

 Length, .26 inch. =6.5 mm. 



Habitat, Nova Scotia, Ohio and Michigan. 



O. americanum Dej. — Bronzy or greenish black; punctures 

 "of striiX rather fine ; markings of elytra more or less confluent ; 

 margin testaceous ; thorax with lateral margins pale and very 

 narrow. Underside pitchy, apex of abdomen paler. Length, .24 

 — .28 inch. = 6 — 7 mm. 



Habitat, N. E. America, southward and westward. 



O. tessellatum Say. (Plate III, Eig. i.) — Pale testaceous ; 

 markings metallic green ; striae with ]:)unctures distinct, more 

 closely placed on disc than at apex ; thorax with coarse punctures, 

 disc and lateral regions with but few punctures ; discal spot 

 rather small, with a narrow process along the median line, ex- 

 tending to the front and hind margins. Underside pale ferrugineous. 

 Length, .26 inch. := 6.5 mm. 



Habitat, N. E. America. 



Cychrus luibr. 

 Head long and slender; labrum l)ifurcate; posterior coxk 



