288 MEMOIRS ON THE COLEOPTERA 



half wider than long, the sides feebly arcuate, rounding inward at 

 base and more broadly so and converging apically; basal angles 

 obtuse and distinctly rounded; apex three-fourths as wide as the 

 base, sinuato-truncate, with broadly blunt angles; impressions nearly 

 obsolete, the stria fine but impressed; punctures of the foveal areas 

 small, very few and irregularly scattered; fovese broadly and very 

 feebly impressed; elytra oblong, two-fifths longer than wide, barely 

 at all wider than the prothorax, the long parallel sides virtually 

 straight, rounding very gradually at base; striae coarse, deeply im- 

 pressed and with coarse crenulate punctuation, the scutellar short 

 but coarse; lateral series subinterrupted; intervals convex. Length 

 (d 71 ) 5.0 mm.; width 2.1 mm. Minnesota (Duluth). A single ex- 

 ample, taken by the writer crenulata n. sp. 



Elytra gradually and arcuately narrowing behind, the punctures of the 

 elytral striae smaller, never very conspicuous 26 



26 Form moderately stout, oblong-oval, polished in both sexes, piceous- 

 black, the pronotum sometimes feebly pallescent toward the sides; 

 under surface piceo-rufous, the legs paler rufous; head very small, 

 seldom distinctly more than half as wide as the prothorax, the eyes 

 moderately prominent, more convex in some examples; antennae 

 ferruginous, extending well behind the thoracic base in the male, 

 shorter ( 9 ) ; prothorax more than one-half wider than long, the sides 

 broadly, subevenly arcuate and slightly converging from base to 

 apex, the basal angles right, only slightly rounded; apex very feebly 

 sinuate, with bluntly rounded angles; impressions rarely evident, 

 the stria distinct and almost entire; punctures of the foveal areas 

 rather numerous to very few, moderate in size, the foveae rather 

 irregular and feebly impressed; elytra fully two-fifths longer than 

 wide, just visibly wider than the prothorax. the sides feebly arcuate; 

 striae not very fine and somewhat impressed, finely to rather strongly 

 punctate, the scutellar very short and often disintegrated; intervals 

 more or less convex; hind tarsi long and very slender. Length (cf 9 ) 

 4.7-5.7 mm.; width 1.8-2.5 mm. New York to North Carolina, 

 Lake Superior (Marquette and Duluth), Iowa and Kansas. Abun- 

 dant. [Am.contempta Lee.] musculus Say 



Form and coloration nearly similar but distinctly larger, the under sur- 

 face paler, rufous, the legs more flavo-rufous; head larger, though 

 but little more than half as wide as the prothorax, the eyes rather 

 large and prominent; strioles short, more or less impressed; antennae 

 nearly as in musculus; prothorax fully three-fifths wider than long, 

 the sides evenly and more strongly arcuate, the basal angles rounded 

 at tip; apex similar; surface with greater tendency to postero-lateral 

 flattening, the punctures of the foveal areas similarly numerous to 

 almost wanting; the foveae are feebly impressed, the inner broad to 

 narrower and sublinear; elytra nearly one-half longer than wide, 

 not (cf) or slightly (9) wider than the prothorax; striae very fine, 

 not distinctly impressed, the punctures extremely fine and widely 

 spaced, the scutellar short and very fine; lateral series not distinctly 

 interrupted; intervals flat or very nearly; punctures of the under 

 surface extremely few and not coarse; hind tarsi long and very 



