THE WATER SCAVENGER BEETLES. 260 



punctate. Elytra finely striate mi disk, more distinctly impressed at sides 

 and apex, the tenth stria wanting: intervals Hat. not distinctly punctate. 

 Length 1.5-2 rnm. 



Kesviusko County; rare. August 5-October 21. 



525 (9335). CERCYON TBISTIS Illig., Mag. I, 1802, 109. 



Resembles luyHbris very closely hut rather smaller and mure narrow. 

 Elytral stria. 1 replaced hy rows of fine punctures not closely placed, which 

 are nearly obsolete on sides and apex; intervals h'at. pnnctnlate 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. May 1- 

 May 28. 



52G (1671). CERCYON NAVICULARIS Zimm., Trans. Ainer. Ent. Soc.. II, 1869, 



250. 



Oval, strongly convex, narrower behind the middle. I'iceous black, 

 shining; elytra often slightly paler at tip and along suture; antenna?, palpi 

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

 curved from base to apex. Elytra very convex, their sides rapidly sloping 

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

 more distinct at sides and apex; intervals very sparsely and finely punc- 

 tate. Body beneath shining, sparsely punctate. Length l.-'-l.T nun. 



Starke, Marshall, 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 Payk.. Faun. Suec., I. 1798, 187. 



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

 with a pale space at apex which varies much in size. Elytral strife equal 

 from base to apex, closely but not coarsely punctate, the tenth very dis- 

 tinct ; intervals fiat, 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. 1S2.",. 



190; ibid. II, 294. 



Oval, slightly oblong, convex. Piceuus black, shining; elytra with 

 sharply defined pale apical space occupying about one-third the surface, 

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

 to apex; surface, as well as that of head, rather coarsely and cfn-ely punc- 

 tate. Elytral stria? feebly impressed, but with rather large, closely plac:'d 

 punctures, those of the outer rows the coarser and deeper; intervals fiat. 

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

 sternal area shining, sparsely punctate; mesosternal elevation oval; piv.- 

 sternum distinctly carinate. Length 1.8-2 mm. 



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

 mon. May 1-October 9. 



