24 NORTH AMERICAN 



the apex, having two small, round, shallow pits very close to the apex and 

 somewhat near the apical angles ; punctures very deep, extremely close near 

 the base and apex ; canaliculation long, narrow, distinctly and roundly 

 impressed, terminating at very short distances from the base and apex. 

 Elytra at base much broader than the head ; sides feebly divergent poste- 

 riorly, rather strongly and evenly arcuate ; together broadly, roundly, and 

 distinctly emarginate behind ; suture as long as the width at base, one-third 

 longer than the pronotum ; surface deeply, rather finely, extremely closely, 

 and unevenly channeled, very confusedly punctate near the base. Abdo- 

 minal segments decreasing uniformly and extremely gradually in width, first 

 as wide as the contiguous elytra; surface coarsely, rather closely and evenly 

 punctulate, more finely and distantly so posteriorly, interspaces polished ; 

 transverse carinae tricuspid, middle cusps strong, acicular toward tips, 

 lateral much broader, somewhat shorter, expanding at tips ; lateral borders 

 very strong. Legs rather long and slender, piceous-black, tarsi rather 

 robust ; first joint of posterior tarsi three-fourths longer than the second, as 

 long as the next two together, and slightly shorter than the fifth. 



Male. — U n k n own. 



Female. — Sixth ventral segment broadly and rather obtusely rounded 

 behind. 



Length 4.0 mm. 



Grimsby, Ontario, 1. 



10. §. JlIllO (Fab.). — Form robust. Pubescence short, sjjarse, evenly 

 distributed, semi-erect, fine, and inconspicuous, cinereous. Head robust, 

 scarcely twice as wide as long; interocular surface moderately depressed, 

 nearly twice as wide as the eye, equally trilobed by the very distinct longi- 

 tudinal sulcations, intermediate surface evenly and rather strongly convex : 

 punctures coarse, very close, unequal in size, mostly coalescent, and generally 

 longitudinally elongated ; ocular lines meeting at slightly more than one 

 length in advance ; antennae much longer than the width of head, slender, 

 piceous-brown, basal joints black, club moderate ; third joint about one-half 

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

 seventh equal in length, the latter slightly thicker, eighth as thick as the 

 seventh, twice as long as wide, ovoidal, very narrow at base, joints of club 

 increasing gradually in length and thickness ; maxillary palpi very long and 

 slender, first and second joints flavo-testaceous, third rather pale piceous- 

 brown, very slender. Prothorax widest at the middle, where it is five-sixths 

 as wide as the head, and very slightly narrower than long; sides thence 

 moderately convergent posteriorly and nearly straight ; surface feebly swollen 

 near the basal angles, transversely and feebly impressed just behind the 

 vertex, rather coarsely, closely, and evenly punctate, punctures coalescent 

 toward the base and apex ; canaliculation very feeble, two-thirds as long as 

 the pronotum, terminating at equal distances from the base and apex. 

 Elytra at base just perceptibly narrower than the head ; sides moderately 

 divergent posteriorly, slightly longer than the width at base, nearly straight 

 anteriorly, arcuate near the apices ; together broadly, roundly, and rather 

 strongly emarginate behind ; suture one-seventh longer than the pronotum; 



