1865.] 417 



hoarcely shorter than the third, slightly thickened towards the apex, 

 joints 6 — 10 transverse, the two penultimate joints scarcely shorter, 

 subcorneal; base obscure rufous. Palpi rufous. Head deflexed, sides 

 of the front sparsely punctured, vertex very smooth. Thorax as wide 

 as the elytra and one-half shorter than broad, the base slightly and 

 the sides moderately rounded, somewhat narrowed anteriorly, apex 

 truncate, anterior angles obtuse, somewhat rounded, deflexed, posterior 

 angles rounded ; transversely convex, the sides densely and obsoletely 

 punctured ; two longitudinal, impressed lines, irregularly and strongly 

 punctured, the intermediate space smooth. Elytra a little shorter than 

 the thorax, the exterior apical angles rounded ; densely and stronglv 

 punctured, with a large, apical, rufo-testaccous spot on each side. Ab- 

 domen parallel, somewhat thickened, densely punctured above, each 

 segment beneath margined at tip with obscure piceous. Legs piceous; 

 tarsi rufous ; posterior femora piceous. 



Varies by the size being twice as great. — Erichson. 



4. Aleochara castaneipennis, Esch. 



Alcochara castaneipennis, Esch. Mann. Bull. Soc. Mosc. 1843, ii, p. 224; ibid. 

 1852, i, p. 309. 



Black, somewhat shining, with sparse grey pubescence ; elytra and 

 legs piceo-castaneous, the former longer than the thorax, thickly punc- 

 tured ; thorax somewhat rounded ; abdomen sublinear, sparsely and 

 deeply punctured above. 



Length If line; breadth j line. 



Hob.— Sitka. 



Var. b. — Base of antennae, legs, elytra and anus testaceous. — Manner. 



:•>. Aleochara sulcicollis, Mann. 



Alcochara sulcicollis, Mann. Bull. Soc. Mosc. 1843, ii, p. 225. 



Linear, black, somewhat shining, with rigid hairs and sparse pube- 

 scence ; thorax longitudinally and deeply bisulcate, the sides sparsely 

 and grossly punctured ; elytra as long as the thorax, deeply and ru- 

 gosely punctured; abdomen parallel, sparsely punctured; base of an- 

 tennae and the legs rufo-piceous. 



Length lo line; breadth i line. 



llab. — Sitka. — Mannerheim. 



6. Aleochara cognata, Miiklin. 



Alcochara cognata, Makl. Mann. Bull. Soc. Mosc. 1852, i, p. 310. 



Black, shining, clothed with suberect pubescence; antennte and legs 

 fuscous; elytra as long as the thorax, densely punctured; abdomen 

 parallel, less densely punctured. 



Length 2 lines ; breadth scarcely more than £ line. 



Hah. — Sitka. — Mannerheim. 



