NORTH AMERICAN COLEOPTERA. 17 



slightly longer than wide, parallel % , slightly wider posteriorly 9> sides straight, 

 slightly arcuate at front angles, hind angles not divergent beyond the line of the 

 sides, cariuate, disc convex very coarsely and closely punctate, lateral margin 

 almost entirely obliterated except near the hind angles. Elytra striate, strise 

 punctured, intervals Hat, closely punctate, rugose at base. Prothorax beneath 

 coarsely not closely punctate, shining. Metathorax and abdomen more finely and 

 closely punctate. Hind coxal plates very little broader internally Length 7-9 mm. 



This species miglit be mistaken for some of the feebler forms of 

 fucosus, but the absence of the lateral margin of the thorax will distin- 

 guish it. The apical border of the thorax and its hind angles are always 

 paler than the disc. 



California, southern Coast Range. 



7. A. sparsus n. sp. — Elongate, piceous, clothed with grayish pubescence, legs 

 and antennte ferruginous. Antennae slender serrate from the fourth joint, joints 

 2-3 each shorter than joint 4, the third shorter than the second. Head coarsely 

 sparsely punctate. Thorax one-fourth longer than wide, sides parallel, slighth' 

 arcuate near the front angles, hind angles slightly divergent, carinate, the carina 

 close to the margin, lateral margin entirely obliterated except near the hind angles, 

 surface sparsely punctate, the punctures not coarse, distant at the middle of the 

 disc. Elytra striate, strise punctured, intervals slightly convex, punctured, some- 

 what rugose at base. Body beneath sparsely punctate, abdomen more finely, 

 sparsely pubescent. Hind coxal plates very gradually broader internally. Length 

 .6.5-7.5 mm. 



A small slender species which might casually be mixed with Sericoso- 

 mns 7oferah'>i. 



Occurs in Oregon and \Vashington Territory. 



10. A. hispidtis n. sp. — Form nearly as robust as Twani^as, piceous, slightly 

 shining, sparsely clothed with brownish pubescence. Antennse brown, attaining 

 the hind angles of the thorax, joints 2-3 equal, a little shorter than the fourth, 

 outer joints feebly serrate. Head densely, moderately coarsely punctured. Thorax 

 a little longer than wide, sides in front arcuate, posterior two-thirds parallel, hind 

 angles slightly divergent, carinate, lateral margin very obtuse and indistinct, disc 

 convex coarsely and deeply punctured, the punctures somewhat denser near the 

 base and very much denser at the sides. Elytra more feebly striate on the disc 

 than at the sides, the discal striae more finely punctured, intervals flat on the disc, 

 more convex at the sides, moderately closely punctate, somewhat rugulose at base. 

 Prothorax beneath densely punctate, the flanks more densely and opaque. Meta- 

 thorax rather finely and densely punctate. Hind coxal plates rapidly broader in- 

 ternally, the free angle very obtuse. Length 8 mm. 



The pubescence of the surface while short is erect. 



One specimen S , Clark's Station, California. 



13. A. iievadeiisis n. sp. -Piceous, sparsely clothed with pale brown pubes- 

 cence. Elytra, hind angles of thorax and legs dull red. Antennse brown, as long 

 as the head and thorax, joints 2-3 each shorter than the fourth, third a little lon- 

 ger than the second, 4-10 very feebly serrate. Head black, coarsely and densely 

 punctate. Thorax very little longer than wide, sides nearly parallel, the hind 



TRANS. AMER. EST. SOC. XII. (5) .VOVEMBER, 1884. 



