218 FAMILY IV. — dytiscid.t;. 



416 (1309). Hydkoi'oeus concinnus Lee, Proc. Phil. Acad. Nat. Sci., 1855. 



297. 

 - -■' Elongate-oval, attenuate behind. Head and thorax red- 



« dish-brown, the latter broadly infuscate at apex, more 

 narrowly at base; elytra- black with three irregular red- 

 dish-brown cross-bars, interrupted at suture, one sub- 

 basal, one just behind the middle and the third at apex. 

 Upper surface glabrous, very finely alutaceous. Elytra 

 each «ith two more or less distinct stria of impressed 

 [junctures and with numerous very minute, scattered ones. 

 Length 3.5 mm. (Fig. 109.) 

 "^^cSiuiu'*' Kosciusko, ilarshall, Fountain and Lawrence 



counties ; frequent. June 27-August 15. A hand- 

 some species resembling unrlulatus, but readily distinguisked by its 

 glabrous surface. 



H. pulcher Lee, colored above as in concinnus, is reported by 

 Dury from Cincinnati. It is evidently very close to concinnus, and 

 Crotch considered them the same, but Sharp describes them as dif- 

 ferent. 



H. ohlitus Aube, dark reddish-bro^sTi, slightly shorter and broad- 

 er than stagnalis, is also a species which may occur in northern In- 

 diana. 



417 (1367). Hydbopobus staonalis H. & H., Cat. Col., 1870, 441. 



Suboval, rather broad, sides parallel, obtusely rounded behind. Uni- 

 form dark reddish-brown, glabrous, feebly shining; head and thorax vary- 

 ing to paler. Thorax short, transverse, thickly margined; disk minutely 

 alutaceous, very finely and sparsely punctate at middle, more coarsely along 

 the base and apex. Elytra each with a median discal row of four to si^ 

 coarse punctures on basal half; elsewhere rather sparsely but distinctly 

 punctate. Length 3.5 mm. 



Laporte County ; rare. October 21. A member of the boreal 

 fauna. It is the coUaris of LeConte, his name being preoeeupied. 



41S (1370). Hydbopobus vtus Lee, Ami. Lye. Nat. Hist, V, 1849, 208. 



Elongate-oval, subdepressed. Head and thorax dark brown or piceous ; 

 elytra paler reddish-brown. Upper surface glabrous, minutely alutaceous: 

 both thorax and elytra very finely, sparsely and evenly punctured. Length 

 ;;.3 mm. 



Found in numbers in mud and water l^eneath a stoue in a deep 

 ravine five miles northwest of Terre Haute, Yigo County. October 

 20. Described from California and Oregon. H. terminatus Sharp 

 is a synonjon, according: to Blanchard. who ha.s compared my speci- 

 mens with the LeConte type. 



