140 NORTH AMEUICAN 



cent, interspaces one-third as wide, polished. Neck very narrow. Prothorax 

 widest at one-tliird the length from the apex where it is distinctly narrower 

 than long ; sides thence very strongly convergent and feebly sinuate to the 

 anterior angles, and very feebly convergent and nearly straight to a point 

 one-fourth the length from the base where they become much more strongly 

 convergent and straight to the basal angles ; apex scarcely more than one- 

 half as long as the base, broadly sinuate ; apical angles acute ; base broadly 

 arcuate ; disk very strongly convex, coarsely variolately and densely piinc- 

 tate, punctures nearly round and not coalescent ; along the middle there is a 

 bioad highly polished impunctate area, equally wide throughout, and having 

 along its crest a very feeble stria. Elytra at base slightly narrower than 

 the head ; sides parallel, feebly arcuate toward the apices ; together broadly 

 roundly and very feebly eniargiuate behind ; disk slightly longer than wide, 

 depressed, highly polished, impressed rather strongly along the suture toward 

 the base, very minutely evenly and sparsely punctate, punctures round and 

 very distinct. Abdomen at base slightly narrower than the elytra; sides 

 divergent to the third segment which is equal in width to the fourth ; border 

 strong ; surface broadly convex, finely closely and asperately punctate ; 

 punctures arranged transversely and sub-serially ; each dorsal segment 

 bearing near the apex on each side and within the border a long erect black 

 seta, and a short discal one near the middle. Legs slender : first joint of 

 the posterior tarsi as long as the next two together. Prosternum narrowly 

 and somewhat feebly carinate. 



Male. — Fifth ventral segment broadly roundly and very feebly eniargiuate 

 in the middle tliird at apex, not toothed ; sixth segment abrui)tly emarginate 

 in its middle tliird at apex, emargination evenly and almost semicircularly 

 rounded, slightly more than twice as wide as deep. 



Female. — Second joint of antennae distinctly longer than the fourth, very 

 slightly shorter than the third. Sixth ventral segment evenly rounded 

 behind. 



Length 3.7-4.6 mm. 



Willets Point, Long Island, 3; Atlantic City, New Jersey, 1. 



It is very singular that such a distinct and well-marked species aa 

 the present should have so long escaped detection. It probably should 

 be placed immediately after opacidus in Dr. LeConte's table of the 

 genus, and may be distinguished from qi(adriceps by the head not 

 being (juadrate beiiind the eyes and not emarginate at base above; 

 from opaculiis it is at once distinguishable by the sexual characters. 

 The above description is taken from the male. The pronotum has 

 on each side two long erect black setae. 



While writing of this genus it is proper to remark that the portion 

 of the head behind the eyes in my representative of S. rudis Lee, 

 altlioiigh very nnich longer than usual in this genus, is still one-third 

 wider than long, and not as Dr. LeConte states longer than wide. 



