THE WATER SCAVENGEB BEETLES. 269 



punctate. Elytra finely striate on disk, more distinctly impressed ;it sides 

 and apex, the tenth stria wanting; intervals flat, not distinctly imiictate. 

 Length 1.5-2 mm. 



Kosi'iusko County; rare. August 5-October 21. 

 52.5 (9335). (Jekcyom tristis Illig., Mag. I, 1802, 109. 



Resembles Jugiibris very closely but rather smaller and more narrow. 

 Klytral strim replaced by rows of fine punctures not closely placed, which 

 are nearly obsolete on sides and apex ; intervals flat, punctulate near the 

 base only. Length 1.5 mm. 



Pine, Lake County and along margins of cypress swamp, Knox 

 County; scarce. Taken from dead crayfish and at sap. Jilay 1- 

 May 28. 



52G (1671). Cercyon navicuiaris Zimm., Trans. Amer. Ent. Soc, II, 1869, 

 250. 

 Oval, strongly convex, narrower behind the middle. Piceous black, 

 shining; elytra often slightly paler at tip and along suture; antenn:e. palpi 

 and legs dull reddish-yellow. Thorax almost smooth, the sides regularly 

 cui-ved from base to apex. Elytra very convex, their sides rapidly sloping 

 downward; strise represented by rows of very fine punctures which are 

 more distinct at sides and apex ; Intervals very sparsely and flnely punc- 

 tate. Body beneath shining, sparsely punctate. Length 1.5-1.7 mm. 



Starke, Jlarshall, Kosciusko and Parke counties; scarce. May 

 20-July 2. Sifted from masses of damp leaves along the borders of 

 pools in low moist woods. 



527 (1680). Cercyon analis I'ayk., Faun. Suec., I, 170s, ]S7. 



Oval, moderately convex. I'iceous black or browni.sh, shining; elytr.i 

 with a pale space at ai)ex whicli varies mucli in size. Blytral striae equal 

 from base to apex, closely but ncjt ciiarsely punctate, the tenth very dis- 

 tinct ; intervals flat, densely punctate except the eighth, which has but a 

 single row of punctures. Length 2-2.5 mm. 



Throughout the State ; frequent. April 15-October 17. 



.528 (1677). Cercyon ocellatus Say, Journ. Phil. Acad. Nat. Sci., V, 1825, 

 190; ibid. II, 294. 

 Oval, slightly oblong, convex. Piceous blacli, shining ; el.\tra with 

 sharply defined pale apical space occupying about one-third the t^urface. 

 the suture piceous to apex. Thorax with sides regularly curved from base 

 to apex; surface, as well as that of head, rather cuarsely and clii^ely punc- 

 tate. Elytral strife feebly impressed, but with rather large, closely placed 

 punctures, those of the outer rows the coarser and deeiier ; intervals flat, 

 distinctly punctulate near the base, much less so on apical third. Meta- 

 stemal area shining, sparsely punctate ; mesosternal elevation oval ; pro- 

 sternum distinctly carinate. Length 1.8-2 mm. 



Kosciusko, Marshall, Vigo, Knox and Jennings counties; com- 

 mon. May 1-October 9. 



