THE CANADIAN ENTOMOLOGIST. 261 



deep, more rounded, isolated though not so sparse as in the preceding 

 forms. Length, £, ?- , 17. 0-19. 5 mm.; width, 6.1-7.3 mm. El 



Dorado Co. (Phcerville) . . .cribripennis, n. sp. 



15 — Larger species, the front nearly smooth medially at apex ; prothorax 

 unusually narrowly rounded and prominent at the sides at apex, 

 and more rapidly narrowed thence to the base than in any other 

 species except Dejeani, the sides straight, the reflexed lateral margin 

 more prominent near the base than elsewhere, owing to the greater 

 lateral depression of the surface at this point 16 



Small species, the front always finely but distinctly punctured in the 

 middle anteriorly ; prothorax more normal in form, less narrowed 

 basaliy, the sides more broadly rounded anteriorly, the reflexed 

 margin not more prominent near the base; elytra only feebly 

 convex 17 



16 — Elytra shorter, about one-half longer than wide, broadly and more 

 evenly convex, shining black, the elytra deep piceous-black ; head 

 with two long oblique anterior impressions, very feebly rugulose, 

 smooth anteriorly, the labrum broadly, evenly arcuate medially and 

 not much produced ; antennae moderately stout; prothorax with the 

 apical width scarcely exceeding the length ( $ ), the surface shining, 

 the rugulosity fine and feeble, the transverse impressions and median 

 stria strong ; elytra distinctly shouldered, finely and sparsely punc- 

 tate, the fovea? very few and subobsolete. Length, <* , 16.0 mm.; 

 width 6.1 mm. Placer Co. (Lake Tahoe, apparently confined to that 

 locality) Edtvardsi, Cr. 



A — Nearly similar, shining, black, the elytra not obviously piceous, the 

 rugulosity of the head and pronotum much stronger, the labrum 

 strongly produced in the middle in a somewhat narrowly and 

 abruptly truncate trapezoidal median lobe ; elytra strongly shoul- 

 dered ( 9 ), the punctures similarly small and sparse but more 

 impressed, the fovea? larger, more distinct and more numerous but 

 still few in number and only moderately evident. Length, % , 

 18.0 mm.; width, 6.5 mm. Placer Co /obatus, n. subsp. 



Elytra decidedly more elongate, relatively narrower, more than one-half 

 longer than wide and distinctly flattened. Body deep black 

 throughout, the elytra not paler, shining; hbrum throughout as in 

 lobatus, strongly produced and trapezoidal medially ; head obliquely 

 impressed anteriorly, smooth between the impression.*, elsewhere 



