COLEOPTERA. 7 5 



polished; punctures only coalescing in twos near the extreme edges, and 

 there only partially. First two abdominal segments of equal width and 

 slightly narrower than the contiguous elytra; border moderate; surface con- 

 vex, coarsely, feebly, and very closely punctulate ; transverse carinae not 

 cusped. Legs slender, pale piceous ; first joint of the posterior tarsi twice 

 as long as the second, second and third equal in length. Under surface of 

 the abdomen piceous-black. 



Male. — Posterior edge of the fifth ventral segment very broadly and just 

 perceptibly emarginate; sixth segment sinuate at the apex, sinus evenly 

 rounded, as wide as deep, one-sixth as wide as the segmental apex. 



Female. — Sixth segment broadly and very distinctly angulate at tip. 



Length 3.0 mm. 



New Hampshire, White Mountains, 2 (forests). 

 The comparative shortness of the sixth antennal joint renders this 

 species readily distinguishable; it is also very distinct in other 



characters. 



57. S. alpicola Fvl. — Form moderately slender. Pubescence extremely 

 fine, moderately long and rather abundant, setiform, pale pioeous-brown, 

 not conspicuous. Head rather large, much less than twice as wide as long ; 

 interocular surface nearly flat, two and one-half times as wide as the eye; 

 equally trilobed by the moderately distinct sulcations ; intermediate surface 

 moderately and evenly convex ; very closely, rather coarsely, and evenly 

 punctate, interspaces shining; ocular lines meeting at slightly more than 

 one length in advance; antennae slender, slightly longer than the width of 

 head, dark piceous-brown, club slender; third joint three-fourths as long 

 again as the fourth, fourth and fifth sub-equal, sixth and seventh equal, 

 shorter, eighth slightly elongated and just perceptibly wider than the sixth, 

 joints of club increasing in length, last nearly as long as the two preceding 

 together ; maxillary palpi \fvy long and slender, dark piceous-brown, paler 

 toward the base. Prothorax robust, widest very slightly before the middle, 

 where it is three-fourths as wide as the head, and as wide as long ; sides 

 thence moderately convergent posteriorly and feebly sinuate ; anterior and 

 posterior margins equal in length, the former very slightly the more arcuate ; 

 surface evenly convex, rather coarsely, closely, variolately, and somewhat 

 evenly punctate ; canaliculation conspicuous, narrowly fusiform, deep, bottom 

 evenly rounded, terminating at a distance from either margin equal to one- 

 sixth the entire length. Elytra at base much narrower than the head, and 

 just perceptibly wider than the prothorax; sides strongly divergent poste- 

 riorly, feebly arcuate, and much longer than the width at base; together 

 broadly and feebly emarginate posteriorly; suture scarcely one-sixth as long 

 again as the pronotum ; surface rather depressed, transversely and feebly 

 impressed just before the middle, the impression extending posteriorly near 

 the external edge of each elytron ; coarsely, feebly, closely, and quite evenly 

 punctate, punctures only coalescent posteriorly near the suture, interspaces 

 convex, very narrow, highly polished. Abdominal segments decreasing at 



