THIS PEEDACEOTjS DIVING BEETLES. 215 



''(?. Elytra dull yellow, clouded with black streaks, finely, densely and 

 evenly punctured. 414. nubilus. 



cc. Elytra usually with a sutural and two dorsal impressed lines, deeply 

 and coarsely punctate ; larger, 5-5.5 mm. 



415. IMPKESSO-PaNCTATTJS. 



409 (1284). CcELAMBDS IN^QUAUS Fab., Ent. Syst, I, 1792, 200. 



Short, suboval, convex abo^e and below. Head and disk of thorax dull 

 yellow, the latter with front and hind margins dusky. Elytra dark brown 

 with traces of dull yellow, notable for the deep and regular punctiires. 

 Under surface coarsely and rather sparsely punctured. Length 3 mm. 



Steuben, Lake, Llarshall, Laporte and Jrarion counties ; common 

 in Lake Maxinkuckee. April 4-Ortober 23. Usually listed as C. 

 ■punctatus Say. 



410 (1288). CcELAMBUs ACARoiDES Ijec, Proc. Phil. Acad. Nat. Sci., VII, 



1855, 294. 

 Rounded-oval, subdepressed. Head, thorax and legs dull yellow ; elytra 

 yellowish, with a large common sutural spot reaching past middle, and 

 three discal spots on each, blackish ; an elevated submarginal carina on 

 middle third. Length 2.5 mm. 



Steuben County; rare. July 5. Described from Illinois and 

 Kentucky and probably occurs throughout the State. 



411 (12S9). CcELAMBTis TiTRBTDus Lec, Proc. Phil. Acad. Nat. Sci., 1855. 



298. 

 Oval, convex. Piceous brown, shining; head, antennae, legs and mar- 

 gins of thorax dull brownish-yellow. Thorax finely punctate on apical half, 

 more coarsely near the base. Punctures of elytra rather dense and mod- 

 erately coarse. Length 2.S mm. 



Lake and Laporte counties; scarce. May 28-.July 21. Re- 

 sembles C. imeqnalis, but beneath black and much less convex, the 

 elytra with finei' punctures and the clypeus not margined in front. 



412 (1377). CVblameus LACcoPHiuNrs Lec, Proc. Amer. Phil. Soc, XVII. 



1878, 595. 

 Short, ovate, subdepressed, pointed behind. Head and thorax light 

 brown ; elytra darker, the male shining. Thorax of male finely rugose and 

 minutely punctured. Elytra rather coarsely and regularly punctate in 

 male ; opaque and very finely punctulate in female. Basal segments of ab- 

 domen rather coarsely punctured in both se.\es. Length 2.6-3 mm. 



IMarion and ^Marshall counties; frequent. March 14-October 1. 

 The females are minutely alutaceous and are much less common 

 than the males. 



413 (1301). CcELAMBUs DissiMiLis Harr., Cat. Ins., 1SM5, 472. 

 Oblong-oval, subconvex. Head and thorax dull yellow to brick-red; 



elytra dark reddish-brown, rather thickly dotted with fine and coarse punc- 

 tures. I^ength 3.8-4 mm. 



Lake, Laporte and Marion counties; scarce. March 14-July 15. 



