52 NORTH AMERICAN 



oval, very deeply impressed, beginning slightly before the middle, two-fifths 

 as long as the pronotum. Elytra at base distinctly narrower than the head ; 

 sides rather strongly divergent posteriorly and very feebly arcuate, slightly 

 longer than the width at base ; together broadly and feebly emarginate be- 

 hind ; suture equal in length to the pronotum ; surface depressed, coarsely, 

 deeply, and very irregularly punctured and channeled. Abdominal segments 

 decreasing uniformly and extremely gradually in width, first slightly wider 

 than the contiguous elytra ; surface rather depressed, very finely, closely, 

 and evenly punctulate ; transverse carinae tricuspid, middle cusps very 

 long, becoming aciculate toward the tips, lateral very short and rudimen- 

 tary, intervals distinctly sinuate. Legs short, dark rufo-piceous, tarsi 

 black ; first joint of posterior tarsi twice as long as the second, and as long 

 as or longer than the last, second slightly longer than the third, fifth joint 

 widest. Under surface of abdomen clothed with long, recumbent, cinereous 

 pubescence. 



Male. — Unknown. 



Female. — Sixth ventral segment very evenly rounded behind. 



Length 3.1 mm. 



Thurston County, Washington Territory, 1. 



Upon the above type of this very well-marked species may be seen 

 nine large parasites, each nearly as long as the first three antennal 

 joints, very convex, polished, and with oval outline ; they are of a 

 pale ferruginous tint, and appear to be comparatively highly organized. 



33. S. Scliwarzi n. sp. (Fauvel MS.). — Form rather slender. Pubes- 

 cence short, fine, sparse, semi-erect, flavo-cinereous, not conspicuous. Head 

 moderate, robust, scarcely twice as wide as long ; eyes large, very convex ; 

 interocular surface very moderately excavated, scarcely twice as wide as the 

 eye, finely, sub-variolately, and irregularly punctate ; punctures rather dis- 

 tant behind, coalescent anteriorly ; longitudinal elevation scarcely more than 

 one-half as wide as the lateral portions, rather acutely and strongly convex ; 

 ocular lines meeting at one length in advance ; antennae long, slender, much 

 longer than the width of head, basal joint black, remainder dark piceous- 

 brown, club moderate; third joint one-fourth as long again as the fourth, 

 fourth and fifth nearly equal, sixth and seventh sub-equal in length, the 

 latter very slightly thicker, eighth elongated, oval, not as long as the ninth, 

 joints of club of nearly equal length ; maxillary palpi pale piceous-brown, 

 growing paler toward the base, third joint nearly as long as the first and 

 second together. Prothorax widest just before the middle, where it is three- 

 fourths as wide as the head, and nearly as wide as long ; sides thence very 

 moderately convergent posteriorly and nearly straight ; anterior margin very 

 slightly longer and more arcuate than the posterior ; surface rather strongly 

 tuberculate on the sides at the base, feebly and transversely impressed 

 just behind the anterior margin, finely and irregularly punctate ; punctures 

 widely separated near the middle, crowded toward the margins, interspaces 

 feebly convex, minutely reticulated ; canaliculation strong, deeply impressed, 

 oval, beginning distinctly before the middle, nearly one-half as long as the 



