120 NORTH AMERICAN 



greater than the width ; surface evenly convex, rather closely and somewhat 

 unevenly punctate ; interspaces polished. Elytra at base a little wider than 

 the head : together broadly, evenly, and rather strongly emarginate ante- 

 riorly and posteriorly ; sides very moderately divergent and arcuate ; humeral 

 angles well developed ; surface evenly convex and punctate ; interspaces 

 polished and about equal in width to the punctures; suture one-fourth as 

 long again as the pronotnm. Abdominal segments decreasing very gradually 

 in width posteriorly ; margin rather narrow ; surface finely and rather closely 

 punctulate ; transverse carinae 4-cuspid, intervals nearly straight, cusps 

 very short, obscure at tip ; first segment as wide as the elytra at base. Legs 

 rather stout, dark fusco-piceous, tarsi short ; first joint of the posterior three- 

 fourths as long again as the second. Under surface piceous-black ; abdomen 

 finely and closely punctulate, clothed with long recumbent pubescence. 



Male. — Posterior edge of the fifth ventral segment almost imperceptibly 

 sinuate: sixth segment broadly and very feebly sinuate at apex, almost 

 transversely truncate. 



Female. — r^ixth segment broadly and somewhat unevenly rounded behind, 

 being just perceptibly produced at the immediate vertex. 



Length 2.3-2.8 mm. 



Cambridge, Massachusetts, 41. 



97. S. ilicertus n. sp. — Form moderately robust. Pubescence very 

 sparse and line, moderately long, pale fiavo-cinereous. Head moderate, 

 slightly more than twice as wide as long ; interocular surface very slightly 

 convex, two and one-half times as wide as the eye ; somewhat coarsely, very 

 closely, and evenly punctate, punctures shallow, sub-variolate, and irregu- 

 larly polygonal ; sulcations very slightly apparent ; ocular lines meeting at 

 two and one-half lengths in advance ; antennae rather slender, a little longer 

 than the width of head, fuscous, basal joint darker, club distinct ; third 

 joint one-third as long again as the fourth, fourth and fifth equal in length, 

 sixth almost imperceptibly shorter, eighth sub-globular, joints of club suc- 

 cessively and uniformly increasing in thickness and length ; first joint of the 

 maxillary palpi ilavo-testaceous, second and third uniform in color, fusco- 

 testaceous. Prothorax widest at the middle, where it is very slightly wider 

 than the interocular surface and very slightly narrower than long; sides 

 thence very moderately convergent posteriorly and straight ; anterior margin 

 slightly longer and more arcuate than the posterior ; surface regularly convex, 

 very slightly and transversely depressed just behind the anterior margin; 

 very closely, rather evenly, and coarsely punctate ; interspaces very narrow. 

 Elytra at base as wide as the head ; sides almost parallel, slightly and nearly 

 evenly arcuate ; together very broadly and feebly emarginate posteriorly ; 

 suture nearly one-fourth as long again as the pronotum ; surface almost 

 evenly convex, rather coarsely punctate ; punctures impressed; interspaces 

 one-half as wide, shining. First three abdominal segments nearly equal in 

 width, and very slightly narrower than the contiguous elytra ; border rather 

 narrow ; surface convex, shining, finely punctulate ; transverse carinae 

 4-cuspid, cusps small and somewhat rudimentary. Under surface of the 

 abdomen dark piceous-brown, finely punctulate, minutely granulate. Legs 



