68 



mandibles black at the tip ; front longitudinally impressed in the centre : 

 prothorax with numerous levigated spaces, obsoletely channelled ; sides 

 anteriorly rounded with a slight sinus near the base ; basilar angles diverg- 

 ing : elytra very obsoletely furrowed, reticulated' with numerous elevated 

 lines, many scattered levigated spaces ; bicarinated at the apex, the inner 

 ridge being very short ; suture terminating in a point ; at their truncated 

 extremity the elytra are divaricated and suddenly attenuated : the first 

 segment of the abdomen, and the breast bones are hollowed out into a 

 longitudinal channel : prosternum linear. [Exceedingly common in Can- 

 ada ; the larva bores into cherry and beech, and probably other trees. 

 Belongs to the genus Dicerca Esch.] 



208. BuPRESTis (Stenuris) tenebrosa Kirby. — Length of body 

 734 lines. Several taken in Lat. 65"^, and in the Rocky Mountains. 



Very like the species just described but much smaller. Body con- 

 fluently punctured, upper surface black, with only the elevated parts 

 glossy, lower bronzed-copper and glossy. Mouth and antennae bronzed ; 

 eyes black ; front sculptured as in St. divaricata . prothorax uneven with 

 shallow impressions and a broad dorsal channel ; distinctly bisinuate at 

 the base ; surface with levigated elevations : scutellum very minute, im- 

 pressed : elytra divaricated and suddenly atten^iated at the apex, which is 

 rounded and has a single ridge ; surface rough with many concatenated 

 and levigated irregular elevations, side of the tip bronzed : breast channel- 

 led underneath, but the first segment of the abdomen less conspicuously, 

 prosternum nearly an isosceles triangle : hypopygium with three short 

 teeth. [Taken in Canada, but not very common: "abundant at Lake 

 Superior" (Le Conte). Belongs to Dicerca.\ 



209. [156.] BuPRESTis (Stenuris) tknebrica Kirby. — Length of 

 body "^y^^ — 9 lines. Several taken in Lat. 54° and at Cumberland-house. 



This species differs principally from St. icnebrosa, which in other 

 respects it greatly resembles, in having the prothorax without any levigated 

 elevations, and with the impressions, except the channel which is better 

 defined, more obsolete. The filytra are distinctly furrowed, especially 

 next the suture, with punctured funows, and there is only a series of levi- 

 gated elevations near the lateral m.argin ; the attenuated ajiex 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 B, Smaller, upper surflice black-bronzed. [Probably synony- 



