1908.] NATURAL SCIENCES OF PHILADELPHIA. 549 



tral, latter inserted little before dorsal origin, fin to anal. Color very 

 variable, usually olivaceous-brown above mottled with diLsky. Black 

 lateral band from snout to caudal, always pronounced in young. 

 Below white. Lower fins whitish to pale yellowish. In spring males 

 sometimes whole body blushed crimson or golden, lateral blackish 

 band vermilion or orange, also lower fins. Later in season dark lateral 

 band turns blackish. Spring males also with head above behind 

 nostrils minutely tuberculate. Length IJ to 3|- inches. Very many 

 examples : from the Delaware R. basin at Kennett Square, Mendenhall, 

 Black Horse Run, second tributary below latter, run near Stock Grange, 

 AVillistown Barrens (Chester Co.); Chadd's Ford, Wawa, Whetstone 

 Run, north branch of Langford's Run, Lewis's Run, Hunter's Run, 

 Collar Brook, Collingdale (Delaware Co.); Wissahickon Creek, Hol- 

 mesburg, Torresdale (Philadelphia Co.); Abrams, Hatboro (Mont- 

 gomery Co.); Cornwells, Neshaminy Falls, Little Neshaminy Creek, 

 Newtown, near Ijanghorne, Tullytown (Bucks Co.); Dingman's Ferry 

 (Pike Co.) : Susquehanna R. basin at Brooklyn (Potter Co.) ; Loyal- 

 sock Creek near Lopez (Sullivan Co.); Octoraro Creek at Nottingham 

 (Chester Co.) ; Paradise, Akron and Trout Runs near Ephrata, Witmer's 

 Mills and run near Blainsport (Lancaster Co.): Allegheny R., Port 

 Allegany and Cole Grove (McKean Co.); Warren (Warren Co.); 

 Youghiogheny R. and Meadow^ Run near Ohio Pyle (Fayette Co.); 

 Beaver R.®; Kiskiminitas R. : Genesee R. at Gold and Raymonds 

 (Potter Co.) : Potomac R. basin in Cove Creek (Fulton Co.). 



This beautiful little fish is very abundant in most all clear swift 

 cold brooks in the State, especially in the mountainous regions. It is 

 variable in the extreme, and many quite striking varieties may be 

 found, even in the same brook. The so-called brown-nosed dace, from 

 our western streams, does not appear to differ in having a paler color 

 and deeper body, so far as I have examined. In fact many western 

 examples are very dark or dusky. The snout is also variable. The 

 fish is often found greatly parasitized with tape-worms, the abdomen 

 then being greatly swollen. It is said to be good as bait. It spawns 

 in the late spring and early summer, though bright-colored examples 

 are found throughout the latter season. 



Hybopsis dissimilis (Kirtland).'*) 



Head 3| to 4^; depth 5 to 6f ; D. iii, 7, i; A. iii, 6, i; scales usually 

 about 47, varying 32 to 50 + 3; scales above 1. 1. usually 6, rarely 7; 



8 Recorded wrongly by me in Am. Nat., XLI, 1907, p. 11, as R. cataractce. 

 ^^ Bean records H. amblops (Rafin6sque) from the Ohio valley hypothetically. 



