104 NORTH AMERICAN 



head, dark piceous-brown, paler toward tlie base, somewhat slender, club 

 moderate ; third joint slightly more than one-half longer than the fourth ; 

 maxillary palpi well developed, dark piceous-brown, gradually becoming 

 slightly paler toward the base, third joint robust toward tip. Prothorax 

 evenly arcuately and very gradually increasing in width to the middle, 

 where it is as wide as long ; sides thence very feebly convergent posteriorly 

 and rather strongly sinuate ; anterior and posterior margins equal in length 

 and curvature, very feebly arcuate ; surface densely, coarsely, deeply, closely, 

 and nearly evenly punctate. Elytra at base slightly wider than the head ; 

 sides parallel, slightly longer than the width at base, rather strongly arcuate, 

 especially toward the apices ; together broadly, roundly, and moderately 

 emarginate behind ; suture slightly more than one-third longer than the 

 pronotum ; surface narrowly and feebly impressed along the suture, espe- 

 cially toward the base, coarsely and evenly punctate ; punctures very deeply 

 impressed, round, distant by slightly less than their own diameters ; inter- 

 spaces strongly convex. Abdominal segments decreasing uniformly and 

 extremely slowly in width, cylindrical, first slightly narrower than the con- 

 tiguous elytra, each distinctly constricted at base ; border obsolete except on 

 the first segment ; surface uniformly closely and coarsely punctate ; intervals 

 moderately convex ; transverse carinae not cusped. Legs rather short, slen- 

 der, piceous-blaok at the coxae, gradually becoming slightly paler toward 

 the claws ; first joint of the posterior tarsi as long as the next two together, 

 second and third equal, as wide as long; fourth joints strongly bilobed. 



Male. — Posterior edge of the fifth ventral segment feebly, narrowly, and 

 roundly emarginate in the middle ; sixth very strongly, deeply, and rather 

 narrowly sinuate at tip, sinus rather acutely rounded at the bottom, more 

 than one-half deeper than wide ; seventh segment broadly, roundly, and 

 distinctly emarginate at tip, lateral teeth well developed. 



Female. — Sixth segment very broadly and obtusely rounded behind, with 

 indications of an obtusely rounded production in the middle. 



Length 3.0 mm. 



Vancouver Island, British Columbia, 5. 



39. A. simiolllS n. sp. — Form robust. Pubescence very short, sparse, 

 rather fine, dark piceo-plumbeus, scarcely visible; entire body very highly 

 polished. Head small, robust, much less than twice as wide as long ; inter- 

 ocular surface nearly fiat, obscure ; intermediate surface rather strongly, 

 narrowly, and acutely convex ; punctures rather large, evenly distributed, 

 deeply impressed, round, separated by much less than their own widths ; 

 interspaces strongly convex ; ocular lines meeting at nearly two lengths in 

 advance ; eyes large, thick ; antennae short and robust, as long as the width 

 of head, rather pale piceous-brown at base, becoming almost black at tip, 

 club rather prominent ; third joint one-third longer than the fourth, seventh 

 three-fourths longer than the eighth, equal in thickness, eighth as wide as 

 long, nearly sub-quadrate, ninth and tenth nearly equal in length, eleventh 

 much longer ; maxillary palpi moderate in length, very slender, rather pale 

 piceous-brown, becoming slightly paler toward the base. Prothorax robust, 

 widest at the middle, where it is about as wide as long ; sides thence equally 



