COLEOPTERA. 29 



rounded at the bottom, about twice as wide as deep ; seventh segment 

 broadly and feebly emarginate at tip. 



Female. — Sixth ventral segment rather acutely rounded behind. 



Length 3.4-3.8 mm. (in an exceptional case 3.2 mm.). 



New Hampshire (White Mts.), 4 ; Lake Superior (Marquette, Michi- 

 picoten River, Gargantua, Isle Royale), GO ; British Columbia, 1. 



From the above list of' localities this species is shown to have a 

 very extensive range ; it is also very abundant. Although very dis- 

 tinct in facies, the vortex spot is so indistinct that isolated specimens 

 may not be placed at first in the subdivision to which it is here 

 referred. Tlie several characters appear to vary very slightly in 

 degree, more particularly in the degree of cylindrical impression of 

 the fifth segment. The specimen from British Columbia has the 

 punctuation of the pronotum a little less dense, and that of the elytra 

 a little finer and deeper, but otherwise it exactly resembles the Eastern 

 representatives. 



14. S. raiiops n. sp. — Form very slender. Pubescence excessively fine, 

 short, and sparse, nearly invisible. Head very robust, much less than twice 

 as wide as long ; interocular surface not twice as wide as the eye, distinctly 

 depressed, longitudinal elevation very narrow, fusiform, short, strongly and 

 evenly convex, impunctate and somewhat prominent ; punctures very close, 

 rather fine, confusedly coalescent ; ocular lines meeting at slightly more than 

 one length in advance ; antennae much longer than the width of head, 

 slender, piceous-brown throughout, club moderate ; third joint very long 

 and slender, feebly curvate, slightly more than one-half longer than the 

 fourth, fourth and fifth joints equal, sixth very slightly shorter and dis- 

 tinctly more slender than the seventh, abruptly much shorter than the fifth, 

 eighth three-fourths longer than wide, as thick as the seventh, oval, joints 

 of club increasing uniformly and rapidly in length, uniformly and very 

 gradually in width ; joints three, four, and five together are as long as the 

 remaining six together; maxillary palpi very long and slender, very pale 

 flavate throughout ; mentum bearing two fiavate setae near the base. Pro- 

 thorax widest at the middle, where it is three-fourths as wide as the head, 

 and nearly one-fifth narrower than long ; sides thence nearly straight ante- 

 riorly, nearly equally convergent and very feebly sinuate posteriorly ; anterior 

 margin shorter and much more arcuate than the posterior; surface rather 

 coarsely and extremely irregularly sculptured ; canaliculation obscurely de- 

 fined, just behind the middle it is visible as a very distinct but indefinitely 

 outlined impression. Elytra at base narrower than the head ; sides very 

 feebly divergent posteriorly, longer than the width at base, feebly arcuate, 

 more distinctly so toward the apices ; together broadly and rather feebly 

 emarginate behind ; suture slightly longer than the pronotum ; surface 

 rather broadly depressed toward the base, very coarsely, extremely closely, 

 deejdy, and irregularly channeled, interspaces acute. Abdominal segments 

 decreasing uniformly and extremely gradually in width, first distinctly nar- 



