32 NORTH AMERICAN 



tinctly granulose ; transverse carinae tricuspid, lateral cusps much smaller 

 than the middle, the latter finely and rapidly acuminate toward tips. Legs 

 moderate, dark piteous-brown, nearly black above, dark fusco-piceous be- 

 neath ; first joint of the posterior tarsi four-fifths longer than the second, and 

 as long as the next two together, slightly longer than the last. Body winged. 



Male. — Fourth ventral segment cylindrically and feebly impressed in its 

 middle third, edge entire ; fifth segment emarginate in its middle third at 

 apex, emargination evenly rounded and nearly seven times as wide as deep, 

 contiguous surface cylindrically and rather deeply impressed nearly through- 

 out anteriorly; sixth segment sinuate at apex, sinus much narrower and 

 more acutely rounded than the apices, slightly more than one-third wider 

 than deep ; seventh segment broad and robust, nearly transversely truncate 

 at tip, lateral setae small. 



Female. — Sixth segment very broadly and evenly rounded behind. 



Length 3.4-4.0 mm. 



Washington Territory (Thurston Co. and Tenino), 4. 



17. S. ZUllicUS n. sp. — Form somewhat robust. Pubescence rather close, 

 coarse, more abundant on the abdomen, where it is very pale flavo-cinereous, 

 elsewhere plurnbeo-cinereous. Head moderate, twice as wide as long ; inter- 

 ocular surface just perceptibly depressed, more than twice as wide as the 

 eye, longitudinal elevation as wide as the lateral portions, evenly and feebly 

 convex; punctures moderate in size, rounded, deep, isolated and unevenly 

 distributed, interspaces nearly flat and somewhat polished ; ocular lines 

 meeting at fully two lengths in advance ; antennae longer than the width of 

 head, slender, basal joints black, remainder dark piceous-brown, club dis- 

 tinct ; third joint scarcely one-eighth longer than the fourth, joints three to 

 six uniformly decreasing in length, sixth and seventh equal in length, the 

 latter much the thicker, eighth one-half longer than wide, strongly conical, 

 base small, joints of club increasing very gradually in length, nearly of equal 

 width ; maxillary palpi well developed, first joint dark piceous-brown, second 

 slightly darker, third piceous-black, nearly as long as the first and second 

 together, rather robust, densely setose. Prothorax arcuately, almost evenly 

 jand rapidly increasing in width to the middle, where it is six-sevenths as 

 wide as the head, and distinctly narrower than long ; sides thence feebly 

 convergent posteriorly and slightly sinuate ; anterior margin shorter and 

 much more arcuate than the posterior ; surface tuberculate near the basal 

 angles, finely, deeply, and somewhat closely punctate, punctures somewhat 

 rounded and distinct, crowded anteriorly, and isolated by nearly their own 

 widths in the middle, interspaces rather feebly convex and shining ; canali- 

 culation beginning at the middle, one-third as long as the pronotum, rather 

 narrow, impressed, somewhat shallow but distinct. Elytra at base as wide 

 as the head ; sides rather feebly divergent posteriorly, slightly longer than 

 the width at base and very feebly arcuate, more strongly so toward the 

 apices ; together broadly, roundly, and distinctly emarginate behind ; suture 

 nearly one-third longer than the pronotum ; surface strongly and broadly 

 impressed on the suture at the base, also very feebly so near the humeri, 

 somewhat closely, finely, and very irregularly punctate, somewhat channeled 



