396 MEMOIRS ON THE COLEOPTERA 



dibles more expanded beneath basally; antennae slightly shorter and 

 thicker; prothorax narrower, less than a third wider than long, the 

 sides less strongly rounded anteriorly and rather less sinuate basally, 

 more broadly and equally reflexed throughout the length, otherwise 

 nearly as in labradorinus, the median stria similarly coarsely sulci- 

 form basally; elytra not quite so elongate, otherwise nearly as in 

 the preceding, though not so noticeably swollen behind the middle 

 and with the striae much less evanescent posteriorly, being subequal 

 in strength throughout the length; met-episterna more finely and 

 feebly punctate. Length (cf) 8.6 mm.; width 2.6 mm. Labrador 

 (W. St. Modest), Sherman minuens n. sp. 



Color black, the elytra piceous and scarcely so shining in the female, 

 piceo-rufous beneath, the legs obscure rufous; head well developed, 

 with large and very prominent eyes, the basal constriction narrow 

 - and deep; mandibles small; antennae rather long and slender, black; 

 prothorax a third to nearly half wider than long, the sides evenly 

 rounded, sinuate basally, parallel in basal fourth, the angles sharp, 

 sometimes slightly prominent; margin deeply and subevenly but 

 not broadly reflexed; anterior impression rather deep, very coarsely, 

 diffusedly punctate; median stria deep but, unlike the two preceding, 

 only slightly coarser or deeper basally; foveae large, deep, coarsely 

 punctate, obscurely bistriate, the carina moderate; elytra two-thirds 

 to three-fourths longer than wide, about one-half wider than the 

 prothorax and not obviously swollen behind the middle, gradually 

 evenly rounded behind; striae distinctly impressed suturally (cf), 

 less so (9 ), distinct though finer to the apex, the punctures strong, 

 less so in the female, the seventh stria very fine in both sexes; third 

 interval with the usual three punctures. Length (cf 9 ) 8.8-9.6 

 mm.; width 2.9-3.2 mm. Michigan (Marquette), Sherman. 

 [Pterostichtis tenuis Lee.] tenuis Lee. 



4 Form subparallel, black, the under surface rufous, darker anteriorly, 

 the legs rufous; head fully three-fourths as wide as the prothorax, 

 the eyes moderately large and prominent; basal constriction coarse, 

 entire, punctate; mandibles small, rounded externally; epistoma 

 transversely tumescent at the middle; antennae rufo-piceous, half as 

 long as the body; prothorax rather large, two-fifths wider than long, 

 the sides evenly rounded, sinuate posteriorly, becoming parallel in 

 about basal fifth or sixth, finely, subevenly reflexed throughout the 

 length; basal angles right, slightly blunt at tip; base and apex equal 

 t in width; anterior impression wholly obsolete, with a few scattered 

 punctures, the apical beading feeble; median stria but slightly coarser 

 and deeper basally; foveae only moderately deep, punctate, the car- 

 ina fine and feeble; elytra three-fourths longer than wide, only a 

 fourth wider than the prothorax, not distinctly inflated posteriorly, 

 very gradually rounding at the sides posteriorly; sides less abruptly 

 rounded at the humeri than in the preceding species; striae very fee- 

 ble, finely, indistinctly and irregularly punctulate, the seventh al- 

 most obsolete, all but the first and eighth obsolete at tip; intervals 

 nearly flat, the third remotely tripunctate; prosternum alone very 



