COLEOPTERA. Ml 



Lake Quesnel, British Columbia, 17. 



This species is characterized by a very broad abdomen ; the first 

 joint of the hind tarsi seems to be slightly variable in length. 



70. S. pacificilS n. sp. (Crotch MS.). — Form moderately slender. 

 Pubescence long, fine, rather sparse on the prothorax and elytra, dense 

 toward the sides and vertex of the abdomen, sub-recumbent, pale flavo- 

 cinereous. Head small, twice as wide as long; interocular surface flat, 

 slightly more than twice as wide as the eye ; equally trilobed by the rounded 

 but distinct sulcations ; intermediate surface evenly and rather strongly con- 

 vex ; punctures deeply impressed, distant, and rather evenly distributed, 

 slightly closer toward the eyes ; interspaces feebly convex and very highly 

 polished ; ocular lines meeting at somewhat less than one length in advance ; 

 antennae slightly longer than the width of head, pale piceous-brown, first 

 joint darker, slender, club distinct ; third joint one-third as long again as the 

 fourth, fourth and fifth equal, sixth longer and much less robust than the 

 seventh, eighth slightly more robust than the seventh, perceptibly elongated, 

 oval, joints of club increasing slightly in length, nearly of equal thickness ; 

 maxillary palpi piceous-black, first joint dark piceo-testaceous. Prothorax 

 arcuately and very gradually widening to a point slightly behind the middle, 

 where it is five-sixths as wide as the head and one-sixth narrower than long ; 

 sides thence very feebly convergent and distinctly sinuate ; anterior and 

 posterior margins equal in length, the former slightly the more arcuate ; 

 surface rather coarsely, closely, and irregularly punctate, punctures rounded, 

 impressed, and often confluent near the margins, rather distant in the middle, 

 interspaces highly polished. Elytra at base as wide as the head ; sides 

 moderately divergent posteriorly, slightly longer than the width at base, 

 and rather strongly arcuate ; together broadly and very feebly emarginate 

 behind; suture one-fifth as long again as the pronotum ; surface convex, 

 just perceptibly and narrowly impressed along the suture toward the base, 

 with a very feeble impression just behind and exterior to the centre of each 

 elytron, extremely irregularly, confusedly, coarsely, rather closely punctured 

 and channeled. Abdominal segments decreasing uniformly and rather 

 gradually in width, first just perceptibly narrower than the contiguous 

 elytra; surface strongly convex, highly polished, very finely, distantly, and 

 evenly punctulate ; transverse carinae 4-cuspid, cusps equal in length, rather 

 short, becoming aciculate toward tips, middle ones more distant than the 

 lateral. Legs rather short and slender, piceous-black, under surface of tarsi 

 slightly paler ; first joint of posterior tarsi four-fifths as long again as the 

 second, slightly shorter than the last, second and third sub-equal. 



Male. — Sixth ventral segment very broadly sinuate at apex, sinus much 

 broader than the apices, and of slightly more feeble curvature, more arcuately 

 rounded at the bottom than along the sides, from six to seven times as wide 

 as deep. 



Female. — Sixth segment rather broadly and unevenly rounded behind. 



Length 2.6-3.0 mm. 



Los Angeles, California, 10. 



