122 NORTH AMERICAN 



along the middle ; longitudinal elevation broad, evenly convex, prominent ; 

 ocular lines meeting at two lengths in advance; antennae slender, somewhat 

 longer than the width of head, piceous-black', club very slender ; third joint 

 three-fourths as long again as the fourth, fourth and fifth sub-equal, sixth 

 and seventh sub-equal, shorter, joints of club elongated, nearly equal in 

 length ; maxillary palpi dark fusco-piceous throughout. Prothorax very 

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

 and distinctly wider than long ; sides strongly arcuate throughout, except at 

 the posterior margin, where they become very feebly sinuate ; anterior and 

 posterior margins equal in length, the former the more arcuate ; surface 

 evenly convex ; rather finely, closely, and evenly punctate ; punctures 

 round and variolate ; interspaces tlat, one-third as wide as the punctures, 

 moderately shining, minutely reticulated; the canaliculation is in the form 

 of a faint longitudinal impression, beginning just before the middle, and 

 one-half as long as the pronotum. Elytra at base slightly narrower than 

 the head; sides moderately divergent posteriorly and feebly arcuate ; just 

 perceptibly longer than the width at base ; together broadly and feebly 

 emarginate behind ; suture one-fifth as long again as the pronotum ; surface 

 feebly impressed along the suture ; rather finely and evenly punctate ; inter- 

 spaces generally one-half as wide as the punctures, shining. First three 

 abdominal segments equal in width, and as wide as the contiguous elytra ; 

 border moderate ; surface feebly convex, finely and somewhat closely punctu- 

 late ; transverse carinae not cusped. Legs rather long and slender, piceous- 

 black throughout ; first joint of the posterior tarsi four-fifths as long again as 

 the second, second as long as the third and fourth together. Under surface 

 of abdomen black throughout. 



Male. — Posterior edge of the fifth ventral segment sinuate, sinus very short 

 and distinct, four times as wide as deep, apices very broad and nearly trans- 

 verse ; surface contiguous to sinus, flattened anteriorly, but scarcely im- 

 pressed, its border densely and coarsely ciliate ; sixth segment narrow and 

 elongated, sinuate at apex, sinus nearly as deep as wide, slightly more acute 

 in curvature than the apices; seventh very broadly and feebly emarginate 

 at apex. 



Female. — Posterior edge of sixth segment very broadly angulate at apex. 



Length 3.3 mm. 



New Hampshire, probably White Mountains, 2. 



The description of this very distinct species has been drawn from 

 the female, the male being in an imperfect condition. It has a 

 superficial resemblance to d/'Jficilis, but the absence of cusps from the 

 abdominal carinae, well developed in the latter, will serve to distin- 

 guish them. 



100. S. lucilleiitlis n. sp. — Form very moderately robust. Pubescence 

 long, rather close, fine, sub-recumbent, cinereous. Head moderate, slightly 

 more than twice as wide as long; interocular surface very feebly depressed, 

 distinctly more than twice as wide as the eye ; equally trilobed by the very 

 feeble rounded sulcations ; intermediate surface nearly flat ; punctures very 



