262 THK CANADIAN ENTOMOLOGIST. 



distinctly rugose ; prothorax with the apical width decidedly greater 

 than the median length, finely, densely rugulose and somewhat 

 alutaceous or dullish ; elytra evidently shouldered, subequally so 

 in the sexes, much narrower in the male, the punctures deeply 

 impressed, moderately small, partially sublineiform, well separated 

 discally, larger and densely crowded laterally and apically. Length, 

 6, 9, 16.5-17.0 mm.; width, 6.1-6.7 mm - Placer Co. 



viontanus, Csy. 

 A — Almost as in viontanus but still more slender in the male, and 

 stouter, with relatively Urger prothorax in the female, shining and 

 deep black throughout ; prothorax similar in form but very highly 

 polished, the rugulosity not so dense though almost as evident 

 throughout j elytra similar in general form, but with the punctures 

 very small and sparse suturally, becoming much larger but still 

 well separated laterally, partially confused apically. Length, £ , ° , 

 14. 7-17. 5 mm.; width, 5.7-6 8 mm. Placer Co. 



/ucidicollis, n. subsp. 

 B — Body rather more abbreviated, the prothorax notably shorter, 

 shining, dark piceous throughout ; prothorax sculptured as in the 

 preceding but not quite so lustrous, though more so than in 

 montantts ; elytra ( $ ) as narrow as in the male of montanus, 

 similarly shouldered, the punctures much larger than in either of 

 the preceding, more rounded, deeply impressed, less widely 

 separated suturally, becoming coarse, deep and crowded laterally 

 and apically. Length, $, 16.0 mm.; width, 5.9 mm. Placer Co. 



brunnescens, n. subsp. 

 17 — Labrum trapezoidal and rather strongly advanced medially, with the 



apex truncate 18 



Labium veiy broadly and evenly arcuate and but very slightly advanced 



medially 19 



18 — Form rather slender ( 9 ), black, moderately shining; head with two 

 small shallow impressions anteriorly, in great part feebly rugose ; 

 antennae moderate ; prothorax slightly wider than long, the sides very 

 feebly arcuate, becoming rounded and parallel in apical third, the 

 surface rather strongly but not very closely vermiculato-rugose, the 

 median stria very fine and feeble ; elytra three-fifths longer than wide, 

 scarcely at all shouldered, gradually ogivally pointed behind, the 

 punctures coarse but well separated suturally, becoming scarcely so 

 large but deeper and very close-set laterally, each puncture with a 



