/4 NORTH AMERICAN 



impressed, club-shaped, widest in front, beginning slightly before the middle, 

 one-third as long as the pronotum. Elytra at base as wide as the head ; 

 sides moderately divergent posteriorly, just perceptibly longer than the width 

 at base, feebly arcuate ; together broadly and strongly emarginate behind; 

 suture one-tenth as long again as the pronotum ; surface of each elytron 

 distinctly and longitudinally swollen in the middle near the base, very un- 

 even, punctures large and feebly impressed, interspaces very convex highly 

 polished. Abdominal segments decreasing uniformly and very gradually 

 in width, first as wide as the contiguous elytra; surface broadly convex, 

 shining, very finely and remotely punctulate ; transverse carinae not cusped. 

 Legs slender, rather dark fuscous, paler at the bases of the femora ; first 

 joint of the posterior tarsi twice as long as the second, as long as the second 

 and third together, last joint much shorter than the first. 



Male. — Fifth ventral segment emarginate in its middle third at apex, 

 emargination evenly rounded, seven to eight times as wide as deep, contigu- 

 ous surface feebly impressed for a short distance anteriorly ; sixth segment 

 sinuate at apex, sinus large and acutely rounding at bottom, but slightly 

 more than twice as wide as deep. 



Female. — Sixth ventral segment prominently and acutely cusped at apex. 



Length 4.2-4.5 mm. 



Sitka, Alaska, 2; Vancouver Island, 1. 



The above description was taken from the Vancouver female, the 

 Alaskan specimens seem to be slightly immature, as the antennae are 

 uniformly of a pale piceous-brown. 



56. S. Ilioiitaillis n. sp. (Schwarz MS.). — Form slender. Pubescence 

 rather long and sparse, recumbent, fine, fusco-cinereous. Head large, 

 scarcely twice as wide as long; interocular surface flat, punctured, inter- 

 spaces one-half the width of the punctures, rather fiat, shining ; longitudinal 

 elevation narrow, in the form of an acute ridge rising far above the general 

 level; ocular lines meeting at about one and one-half lengths in advance ; 

 antennae slender, much longer than the width of head, piceous-brown 

 throughout, club slender ; third joint one-half as long again as the fourth, 

 fourth and fifth nearly equal, sixth distinctly shorter than the seventh, joints 

 of club elongated ; first joint of maxillary palpi testaceous, second darker, 

 third very robust, fuscous. Prothorax very short and robust, widest at one- 

 third the length from the anterior margin, where it is as broad as long; 

 sides thence moderately convergent posteriorly and straight ; anterior and 

 posterior margins sub-equal ; surface nearly even, rather coarsely and evenly 

 punctured ; punctures round and impressed, interspaces equal to them in 

 width, shining : canaliculation rather feeble, narrow, commencing just be- 

 hind the anterior margin and becoming extinct at the base. Elytra at base 

 much narrower than the head ; sides strongly divergent posteriorly, longer 

 than the width at base and very feebly arcuate ; together broadly and just 

 perceptibly emarginate behind ; suture one-sixth as long again as the pro- 

 notum ; surface nearly evenly convex, coarsely, feebly, and quite evenly 

 punctured, interspaces much narrower than the punctures, feebly convex, 



