OOLEOPTEIiA. 1G3 



convex and very highly polished ; ocular lines meeting at about two lengths 

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

 basal joint black, second piceous-black, remainder piceous-brown, club 

 prominent, very loose; joints three to five very long, uniformly and gradu- 

 ally decreasing in length, joints of club increasing in length and thickness ; 

 maxillary palpi long, black, piceous-black at the base, third joint rather 

 robust. Prothorax widest just behind the middle, where it is distinctly 

 narrower than long ; sides thence nearly straight and very slightly conver- 

 gent anteriorly, moderately convergent and feebly sinuate posteriorly ; ante- 

 rior margin much longer than the posterior, nearly equally and feebly 

 arcuate ; surface with an elongated, oblique, impunctate tuberculation near 

 each basal angle, and a median fusiform impunctate and slightly elevated 

 area, beginning slightly in advance of the middle, and extending nearly to 

 the base ; punctures rounded, very deeply impressed, somewhat distant and 

 irregularly distributed, entire surface extremely highly polished. Elytra 

 at base very slightly narrower than the head ; sides rather feebly divergent 

 posteriorly, longer than the width at base, rather strongly arcuate, more 

 strongly so posteriorly ; together broadly, roundly, and rather feebly etnar- 

 ginate behind ; suture about one-eighth longer than the pronotum ; surface 

 slightly uneven near the middle of each elytron, feebly impressed on the 

 suture at the base ; punctures round, deep, small, sparse, nearly evenly 

 distributed ; interspaces convex and extremely highly polished. First four 

 abdominal segments equal in width, cylindrical, slightly narrower than the 

 contiguous elytra ; surface polished, somewhat rugulose, very sparsely and 

 indefinitely punctulate ; border obsolete ; transverse carinae tricuspid, mid- 

 dle cusp alone prominent. Legs rather short, slender, black throughout; 

 first three joints of the posterior tarsi almost uniformly and very rapidly 

 decreasing in length ; fourth strongly bilobed. 



Male. — Posterior edge of the fifth ventral segment emarginate in its middle 

 fifth, emargination rounded, very feeble and very unevenly outlined; sixth 

 segment very narrowly and deeply sinuate at apex, sinus very acutely 

 rounded at the bottom, nearly as long as the entire segment, much deeper 

 than wide ; seventh broadly emarginate at tip. 



Female. — Sixth segment very obtusely rounded behind, almost truncate. 



Length 3.7-4.0 mm. 



Vancouver Island, British Columbia, 7. 



This very fine distinct species is conspicuous for the longitudinal 

 impunctate cafinifbrm swelling of the pronotum, and the excessively- 

 high polish of the head, pronotum, and elytra. 



10. A. agnatllS n. sp. — Form moderately robust, feebly depressed. 

 Pubescence long, coarse, sub-recumbent, rather sparse, cinereous, and some- 

 what conspicuous. Entire surface highly polished. Head rather small, 

 robust ; labrum large ; interocular surface much more than twice as wide as 

 the eye, convex ; sulcations narrow and moderately distinct ; intermediate 

 surface wider than the lateral portions, strongly and evenly convex ; punc- 

 tures rather large, evenly distributed, deeply impressed, rounded, distant 

 generally by less than one-half their widths ; ocular lines meeting at some- 



