156 NORTHERN ZOOLOGY. 



(209) 8. * Buprestis (Stenuris) tenebrica. Dark B. Stenuris. 



B. St. (tenebrica J confluenter punctata, supra nigra obscura, subtus cuprea nitida; prothorace sublacunoso, latins canaliculato ,■ 



elytris striatis, apice subito et valde attenuatis, subtruncatis. 

 Dark B. Stenuris, conrluently punctured ; above black, obscure ; below copper, glossy ; prothorax with shallow impressions, 



widely channelled ; elytra furrowed, suddenly and much attenuated at the apex, subtruncated. 



Length of the body 7f — 9 lines. 



Several taken in Lat. 54°. and at Cumberland-house. 



DESCRIPTION. 



This species differs principally from St. tenebrosa, which in other respects it greatly resembles, 

 in having the prothorax without any levigated elevations, and with the impressions, except the chan- 

 nel which is better defined, more obsolete. The elytra are distinctly furrowed, especially next the 

 suture, with punctured furrows, and there is only a series of levigated elevations near the lateral 

 margin ; the attenuated apex of the elytra is longer, rather truncated, and underneath of a dark 

 blue : the prosternum is linear, and the base of the abdomen scarcely channelled : the teeth of the 

 hypopygium are longer and of a brilliant ruddy-copper. 



Variety R. Smaller, upper surface black-bronzed. 



xvi. * Subgenus Odontomus. Kirb. 



Labrum minute, corneous, subemarginate. 



Palpi with the last joint cylindrical. 



Rhinarium indistinct. 



Nose with an angular sinus. 



Antenna as in Stenuris, but the third joint is twice the length of the fourth. 



Elytra at the base circumscribed by the segment of a circle, serrulated at the apex. 



Humeri incrassated and armed with a tooth. 



Tarsi as in Stenuris. 



Prosternum flat, constricted in the middle. 



This subgenus, or perhaps genus, of which Buprestis chrysostigma Linn, may be regarded as 

 the type, and to which also B. femorata Fabr. and many others belong, is strikingly distinguished 

 by its incrassated anterior thighs, or humeri, 7 armed with a stout tooth ; the back of the abdomen, in 

 all the known species, is of a beautiful blue or green. 



1 Introd. to Ent. iii, 368. c. 



