218 FAMILY IV. DVI'ISCUXT-;. 



416 (3309). Hyi)K()I'<)1u\s concinnus Lee, Proc. Phil. Acad. Nat. Sci., 1855. 



297. 

 — -''' Elougate-oval, attenuate behiud. Head aud thorax red- 



§ dish-brown, the latter broadly iufuscate at apex, more 

 narrowly at base ; elytra black with three irregular red- 

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

 basal, one just behiud the middle aud the third at apex. 

 Upper surface glabrous, very finely alutaceous. Elytra 

 each with two more or less distinct strite of impressed 

 punctures and with numerous very minute, scattered ones. 

 Length 3.5 mm. (Fig. 109.) 

 '^'(Original.) "' Kosciusko, Marshall, Fountain aud Lawrence 



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

 some species reseml^ling undulaius, but readily distinguished by its 

 iriabrous surface. 



H. -pulcJier 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-brown, slightly shorter and broad- 

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

 diana. 



417 (1307). HvuKOFoias stagnalis G. & IL, 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 iialer. Thorax short, transverse, thickly margined; disk minutely 

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

 the base aud apex. Elytra each witli a median discal row of four to six 

 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 collaris of LeConte, his name being preoccupied. 



418 (1370). Hydroporus vilis Lee, Ann. Lye. Nat. Hist.. V, 1849, 208. 

 Elongate-oval. subdei)rossed. Head and thorax dark brown or piceuus; 



<el;y'tra paler reddish-brown. Upper surface glabrous, minutely alutaceous ; 

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

 J).;> nun. 



Kouiid in numbers in mud and water beneath a stone in a deep 

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

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

 is a synonym, according to Blan chard. Avho has compared my speci- 

 mens with the LeConte type. 



