COLEOPTERA. 7\) 



as long again as the second, as long as the fifth, joints two to four uniformly 

 and very gradually decreasing in length. Body winged. 



Male. — Unknown. 



Female. — Sixth ventral segment rather narrow, rounded behind, just per- 

 ceptibly and obtusely produced behind in the middle. 



Length 2.6 mm. 



Lake Tahoe, Nevada, 1. 



60. S. ellipticus n. sp. — Form robust. Pubescence excessively short, 

 rather sparse, erect, piceo-plumbeus, very inconspicuous. Head rather 

 small, very robust, much less than twice as wide as long ; iuterocular surface 

 distinctly more than three times as wide as the eye, nearly flat; longitudinal 

 elevation slightly wider than the lateral portions, evenly and rather strongly 

 convex, rising slightly above the level of the eye ; punctures coarse, rather 

 close, evenly distributed ; ocular lines meeting at two lengths in advance ; 

 eyes very narrow ; antennae as long as the width of head, black, rather 

 slender, club moderate ; third joint abruptly narrower at the base, one-third 

 longer than the fourth, fourth and fifth equal, sixth slightly longer than the 

 seventh, more slender, eighth slightly shorter, as wide as the seventh, club 

 compact, joints increasing gradually in length, tenth widest ; maxillary palpi 

 well developed, black, first joint very slightly paler, piceo-testaceous. Pro- 

 thorax very robust, widest just before the middle, where it is nearly as wide 

 as the head, and as wide as long ; sides thence rather rapidly convergent 

 posteriorly and very feebly sinuate ; anterior and posterior margins equal 

 in length, the former slightly the more arcuate ; surface rather acutely and 

 longitudinally ridged at a short distance from the canaliculation, margins 

 of canaliculation elevated ; transversely impressed immediately behind the 

 apex ; punctures small, variform, very closely compacted, irregularly poly- 

 gonal, interspaces acute; canaliculation rather deeply impressed, terminat- 

 ing at distances from the base and apex equal in length to one-eighth of the 

 pronotum, nearly equal in width throughout, bottom punctate. Elytra at 

 base much wider than the head ; sides distinctly divergent posteriorly, longer 

 than the width at base, feebly arcuate ; together roundly and rather strongly 

 emarginate in the middle half behind ; suture one-half longer than the pro- 

 notum ; surface impressed feebly along the suture, more broadly so at base, 

 longitudinally and feebly impressed near the humeri ; sculpture feeble and 

 very irregular ; near the borders of the sutural impression the punctures are 

 very small, feeble, distant, and isolated, interspaces nearly flat and very 

 highly polished ; between this and the sides the sculpture consists of a con- 

 fused network of channels, with the interspaces acute ; near the humeri the 

 punctures are distinct and very close, with the interspaces narrow and feebly 

 lustrous. Abdominal segments decreasing uniformly and rapidly in width, 

 first distinctly narrower than the contiguous elytra: surface feebly convex, 

 closely, evenly, and coarsely punctulate, interspaces polished; transverse 

 carinae tricuspid, middle cusps long, rather finely acuminate, prominent, 

 lateral much shorter, broad, and very indefinite. Legs rather short and 

 slender, piceous-black, femora distinctly fuscous beneath toward the base; 

 first joint of the posterior tarsi two-thirds longer than the second, as long as 



