THE WATER SCAVENGER BEETLES. 



269 



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

 and apex, the tenth stria wanting,; intervals fiat, not distinctly punctate. 

 Length 1.5-2 mm. 



Kosciusko County ; rare. August 5-Qctober 21. 



525 (9335 ). Cercyon tristis Illig.. Mag. I. 1802, 109. 



Resembles lugubris very closely but rather smaller and more narrow. 

 Elytral stria} replaced by rows of fine punctures not closely placed, which 

 are nearly obsolete on sides and apex; intervals fiat, 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. May 1- 

 May 28. 



526 (1671). Cebcyox xaviculabis 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 ; antennae, 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; stria? 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 1.5-1.7 ram. 



Starke. Marshall. Kosciusko and Parke counties; scarce. May 

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

 pools in low moist woods. 



527 (1680). Ceecyox axalis Payk.. Faun. Suec.. I, 1798, 187. 



Oval moderately convex. Piceous black or brownish, shining; elytiM 

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

 from base to apex, closely but not coarsely 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). Cercyox ocellattts Say. Journ. Phil. Acad. Nat. Set, V. 1825. 



190: ibid. II, 294. 



Oval, slightly oblong, convex. Piceous 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 closely punc- 

 tate. Elytral stria? feebly impressed, bur with rather large, closely placed 

 punctures, those of the outer rows the coarser and deeper : 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-Oetober 9. 



