164 NORTH AMERICAN 



what more than two lengths in advance ; eyes small ; antennae slightly 

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

 piceons-brown, club distinct ; third, fourth, and fifth joints nearly uniformly 

 and gradually decreasing in length, eighth slightly less robust than the 

 seventh, joints of club of nearly equal width ; maxillary palpi short, dark 

 piceo-testaceous. Prothorax widest at the anterior angles, where it is slightly 

 narrower than long and about five-si,xths as wide as the head ; sides gradu- 

 ally convergent to the base and strongly bisinuate ; anterior sinus just 

 behind the apical angles, much shorter thau the posterior ; anterior and 

 posterior margins equally and rather strongly arcuate, the former about 

 one-third longer; anterior angles well marked; surface rather strongly 

 tuberculate near each basal angle, transversely impressed just behind the 

 anterior margin, rather finely and evenly punctate; punctures round, im- 

 pressed, generally distant by slightly less than their own widths ; interspaces 

 slightly convex. Elytra at base about as wide as the head; sides feebly 

 divergent posteriorly, nearly one-third longer than the width at base, feebly 

 and almost evenly arcuate throughout ; together very broadly, evenly, 

 roundly, and somewhat strongly emarginate behind ; apical angles very 

 acute and well marked ; surface somewhat depressed, very strongly im- 

 pressed on the suture throughout its length, each elytron also impressed 

 before the middle and behind the middle exteriorly ; punctures rather 

 coarse, round, deeply impressed, evenly distributed, generally distant by 

 their own widths ; interspaces moderately convex ; suture nearly one-third 

 longer than the pronotum. Abdominal segments decreasing uniformly and 

 just visibly in width, first very slightly wider than the contiguous elytra, 

 strongly constricted at base ; border nearly obsolete except on the first seg- 

 ment, where it is rather strong ; surface finely and rather feebly punctate ; 

 transverse carinae not cusped, irregularly toothed and coarsely setose. 

 Legs short, slender, piceous-black ; first joint of the posterior tarsi as long 

 as the next two together ; fourth joints strongly bilobed, lobes slender. 



Male. — Unknown. 



Female. — Sixth segment transversely and broadly truncate at tip, trunca- 

 tion very feebly bisinuate. 



Length 4.3 mm. 



British Columbia, 1. 



A distinct species, distinguished by the very peculiar form of the 

 prothorax, the prominent anterior angles being observed in no other 

 species of the group in our fauna. In the strong sparse setae grow- 

 ing from the transverse carinae of the abdomen, and in the general 

 character of the surfaces, it bears a resemblance to plieipeiutis of 

 Vancouver Island ; the very long elytra and peculiar pronotum will, 

 however, at once distinguish it from any other species. 



11. A. Sayi n. sp. — Form moderately robust, somewhat depressed. 

 Pubescence rather long, sparse, evenly distributed, sub-recumbent, coarse, 

 cinereous, absent from the middle portions of the abdominal segments. 

 Surface of the body shining, distinctly and minutely reticulated. Head 



