438 Coleopterological Notices, VI. 



Whenever possible the descriptions which follow are drawn 

 from the male. 



The measurements of length refer to the head and body as far 

 as the extremit}^ of the elytra, the abdomen being wholly excluded. 



1. C. knoxi Lee. — Proc. Acad. Nat. Sci., Phila., 1866, p. 374; Horn: 

 Trans. Am. Eiit. Soc, VI., 1(^77, p. 110. 



Moderateh' broad, testaceous, the head and apical half of the 

 pi'onotum, elytra externally and toward apex and abdomen in 

 about apical half, black ; antennre blackish but testaceous toward 

 apex and base. Head nearly one-half as wide as the prothorax, 

 minutel}' punctulate, extremely minutely and feebly substrigilate, 

 the antennae long, feebly incrassate, the tenth joint in the male but 

 slightly longer than wide, the eleventh one-half longer than wide 

 and acutely and s^'mmetrically pointed. Prothorax three-fifths 

 wider than long, the apex about three-fifths as wide as the base, 

 minutely, very closely and rather distinctl}" punctulate, the sur- 

 face extremely minutely and transversely substrigilate. Elytra 

 nearly as long as wide, only slightly narrowed from the base, with 

 the sides evenly and feebly arcuate, slightly narrower than the 

 prothorax, the external apical angles right and but little rounded ; 

 apex very feebly, triangularly' emarginate; disk rather depressed 

 and finely, excessivel}^ densely punctulate, extremely minutel}'^ 

 and densely pubescent. Abdomen rapidly conical, the black 

 seta? short and inconspicuous toward base. Length 2.25 mm.; 

 width 1.25 mm. 



Pennsylvania to Wisconsin (Bayfield, Lake Superior). The 

 male has a large triangular emargination at the apex of the 

 sixth ventral segment, the angle of which is rather broadly 

 rounded. In this distinct species the elytral sculpture and ves- 

 titure are more minute and dense than in anj- other known to me. 



2. C littorea Linn. — Faun. Suec, 852 ( Staphylinus ) ; Er. : Gen. Staph., 

 p. 219 (Conurus); Horn: Tr. Am. Ent. Soc, VI., p. 109. 



Almost similar in form and size to knoxi, blackish throughout, 

 the pronotum near the sides and a large somewhat obliquel}' oval 

 spot at the middle of the base of each elj'tron testaceous ; apices 

 of the ventral segments slightly pale. Length 2.4 mm.; width 

 1.35 mm. 



Europe and Massachusetts. The sixth ventral of the male has 

 a very large triangular emargination nearl}- as in knoxi, but with 



