COLEOPTERA. Gl 



deeply impressed, slightly more than one-half as long as the pronotuui, 

 bottom impunctate and shining. Elytra at base distinctly narrower than 

 the head ; sides moderately divergent posteriorly, slightly longer than the 

 width at base, feebly arcuate ; together broadly and rather strongly emargi- 

 nate behind ; suture one-fifth longer than the pronotum ; surface rather 

 depressed, feebly impressed on the suture near the base, rather feebly, very 

 closely and confusedly punctate ; punctures seldom coalescing, interspaces 

 varying in width, moderately convex, and comparatively lustreless. Abdo- 

 minal segments decreasing uniformly and very gradually in width, first very 

 slightly narrower than the contiguous elytra ; surface shining, extremely 

 feebly, finely, evenly, and rather distantly punctulate ; transverse carinae 

 tricuspid, middle cusps strong, finely aciculate at apex, lateral much shorter 

 and broader, acuminate at tip. Legs moderate, slender, fuscous above, 

 femora rather pale rufous beneath, posterior femora long, slender, and very 

 straight; first joint of posterior tarsi twice as long as the second, and dis- 

 tinctly longer than the fifth, joints two to four decreasing uniformly and 

 rather gradually in length. 



Male. — Unknown. 



Female. — Sixth ventral segment very feebly and narrowly bilobed, 



Length 3.3 mm. 



Marquette, Lake Superior, 1. 



This species bears a considerable resemblance to femoratus Say ; 

 the similarity is superficial, however, as the punctuation is of an 

 entirely different order. 



42. S. Vespertimis n. sp. — Form robust. Pubescence moderately 

 short, fine, semi-erect, setiform, rather close, evenly distributed, pale piceo- 

 cinereous. Head rather small, robust, twice as wide as long ; interocular 

 surface nearly flat, twice as wide as the eye, equally trilobed by the very 

 strong rounded sulcations ; intermediate surface evenly and strongly con- 

 vex ; finely, rather evenly, and somewhat distantly punctate, interspaces 

 flat and moderately lustrous ; ocular lines meeting at two-thirds of a length 

 in advance ; antennae very slightly longer than the width of head, piceous- 

 black, slender, club moderate ; third joint one-third as long again as the 

 fourth, fourth and fifth equal, sixth and seventh equal in length, the latter 

 one-half as thick again, eighth as wide as long, sub-globular, joints of club 

 sub-globular, last slightly elongated ; maxillary palpi rather long and slen- 

 der, piceous-black, first joint deep rufo-testaceous, third somewhat flattened 

 and densely clothed with short, semi-erect, cinereous setae. Prothorax 

 robust, widest just before the middle, where it is four-fifths as wide as the 

 head, and as broad as long ; sides thence slightly less rapidly convergent 

 anteriorly than posteriorly, and nearly straight ; anterior margin slightly 

 longer and more arcuate than the posterior ; surface nearly evenly convex, 

 very faintly and obliquely tuberculate near the basal angles ; finely, moder- 

 ately closely, and rather confusedly punctate, interspaces flat ; canalicula- 

 tion in the form of a very faint erosion, which is, however, clearly outlined, 

 slightly nearer the base than the apex, and two-thirds as long as the pro- 

 notum. Elytra at base distinctly wider than the head ; sides very feebly 



