COLEOPTERA. 53 



pronotum. Elytra at base very slightly narrower than the head ; sides 

 rather feebly divergent posteriorly, just perceptibly longer than the width 

 at base, feebly arcuate; together broadly and somewhat feebly emargin ate 

 behind; suture as long as the pronotum, surface somewhat uneven, rather 

 finely and very irregularly punctured; punctures isolated toward the suture 

 and the base, coalescent elsewhere, especially near the inner apical angles, 

 toward which the channels are generally more or less convergent. Abdo- 

 minal segments decreasing uniformly and very gradually in width, first 

 somewhat narrower than the contiguous elytra ; surface finely punctulate ; 

 transverse carinae tricuspid, cusps distant, middle ones long and finely aci- 

 culate, lateral shorter, aciculate, inclined inward. Legs moderate, fusions, 

 except the under sides of the femora, which are rufous ; tarsi slender; first 

 joint of posterior twice as long as the second and slightly longer than the 

 fifth, second and third nearly equal. 



Male. — Under surface of third ventral segment slightly flattened in its 

 middle third, edge scarcely modified ; fourth segment just perceptibly emar- 

 ginate in its middle three-fifths at apex, emargination evenly rounded, con- 

 tiguous surface feebly and conically impressed throughout anteriorly ; fifth 

 deeply emarginate in its middle third at apex, emargination very evenly 

 rounded, six times as wide as deep, contiguous surface strongly and conically 

 impressed throughout anteriorly, sides of impression distinct and feebly con- 

 vergent ; sixth segment strongly, narrowly, and deeply sinuate at apex, 

 almost triangularly incised, incisure acutely rounded at the bottom, sides 

 nearly straight, deeper than wide ; seventh segment broadly and feebly 

 emarginate at apex, emargination transverse at bottom, teeth short and 

 setigerous. 



Female. — Sixth segment evenly rounded behind throughout. 



Length 2.8-3.0 mm. 



Cambridge, Massachusetts, 8. 



The convergence of the punctular channels toward the inner apical 

 angles of the elytra is also mentioned as a peculiarity of militaris of 

 the Lake Superior region. 



34. S. pauper n. sp. — Form slender. Pubescence very fine, short, 

 sparse, sub-recumbent, pale flavo-cinereous. Head rather large and robust, 

 twice as wide as long; interocular surface slightly depressed, more than 

 twice as wide as the eye, equally trilobed by the very prominent sulcations ; 

 intermediate surface evenly and strongly convex, punctures round, rather 

 small, evenly distributed, distant by more than their own widths, inter- 

 spaces flat, highly polished ; ocular lines meeting at less than one length in 

 advance, lines of juncture strongly curved near the front; antennae slender, 

 much longer than the width of head, first joint black, remainder piceous- 

 brown, club moderate; third joint two-fifths as long again as the fourth, 

 fourth and fifth equal, sixth distinctly longer and more slender than the 

 seventh, eighth sub-globular, joints of club increasing in length ; maxillary 

 palpi moderate, first joint pale testaceous, remainder dark piceo-testaceous. 

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



