1 82 MEMOIRS ON THE COLEOPTERA 



sometimes coarser and distinctly impressed (9), finely, not very 

 closely punctate, the punctures confined to the strise except basally; 

 intervals flat to slightly convex, the punctures confusedly arranged, 

 rather close-set and coarse, being much larger than those of the 

 strise; concave side margins very distinct; male characters nearly 

 as in the preceding. Length (c? 9 ) 9-0-9.5 mm.; width 3.2-3.3 

 mm. A single pair, unlabeled in the Levette collection but probably 

 from Colorado, [thttdsonica Lee.] unicolor Kirby 



Sides of the pronotum very broadly concave and gradually very strongly 

 reflexed, the punctures always notably coarse, moderately close-set 

 and more or less irrregular in distribution, the reflexed part of the 

 sides very thin, diaphanous and testaceous with the punctures very 

 coarse but sparser 1 1 



II Gutter forming the elytral margins strong and conspicuous; body 

 larger and broader, the coloration nearly uniform 12 



Gutter unusually fine though evident; body smaller and narrower, 

 the elytra more or less variegated with paler tint 13 



12 Elytra shining in both sexes. Color blackish-piceous, the margins 

 pale, the under surface paler medially, the legs piceo-testaceous; 

 pubescence rather short, coarse, yellowish; head relatively rather 

 small but not much narrowed at the neck, the eyes prominent; 

 antennae testaceous, slender; punctures very coarse, close-set; 

 prothorax large and transverse, fully one-half wider than long, 

 rounded almost evenly at the sides, which rapidly converge, becoming 

 slightly sinuous posteriorly, the angles right, prominent and sharp; 

 base feebly arcuate, as wide as the apex, which is broadly, rather 

 deeply sinuate, with rounded angles; punctures coarse, deep and 

 rather close-set, the median stria very fine and inconspicuous; 

 elytra not quite a third longer than wide, only about two-fifths 

 wider than the prothorax, slightly inflated posteriorly, the striae 

 fine, shallow, having unevenly spaced punctures which are generally 

 notably wider than the striae, the flat intervals with irregularly 

 scattered and very fine punctures, much smaller than those of the 

 striae; male with a very faint and rather broad sinuation at the apex 

 of the rounded last ventral segment. Length (cf 9) 8.5-9.2 mm.; 

 width 3.5-3.8 mm. Lake Superior; also New York (LakeChamplain). 



[reflexa Lee.] cribricollis Dej. 



A Similar in size and external form to laticollis but with the elytra 

 shining; general characters as in reflexa (cribricollis) but larger, 

 with broader elytra and less coarsely punctured head and pro- 

 thorax, the latter also more narrowed behind and with the pos- 

 terior angles less obtuse. Length 10.2 mm. Washington State. 



abstrusa Lee. 



Elytra strongly alutaceous at least in the female. Color blackish- 

 piceous, the under surface pale piceo-testaceous, more obscure at 

 the sides, the prosternum and propleura blackish; hairs rather short, 

 numerous and of an unusually dark fulvous tint; head nearly as in 

 the preceding but relatively larger, the punctures very coarse but 

 not so close-set; antennae dark testaceous, long, slender and filiform, 

 rather more than half as long as the body; prothorax relatively much 



