94 THE FISHES OF OHIO. 
Genus: DIPILESION. 
Diplesion blennioides (Rafinesque). GREEN-SIDED DARTER. 
Head about 4%; depth 43% to6. D. XII to XIV-12 to 15; A. II, 8 or 9; 
scales 6-58 to 78-14. Body elongate, subterete. Head short, profile very 
convex, snout very blunt, cheeks tumid; eyes large, 3%, high up and close 
together; mouth sniall, inferior; gill membranes broadly connected. Cheeks 
with fine scales, opercles with large ones, breast naked Color dark olive 
green, tessellated above; sides with 7 or 8 Y-shaped, dark bars, these some- 
times confluent to form a dark zigzag band. In highly colored males a 
number of broad, bright green bands almost encircle the body. Females 
and young may be quite dull, but the pattern of the dark marks on the side 
is characteristic. Length 3 to 5 inches. 
The Green-sided Darter is an abundant resident of the clear, 
rapid streams of the state, found especially on stony ripples. 
Rafinesque records it from the Ohio and Muskingum. Kirtland 
mentions its occurrence in the state, and Jordan gives it as 
‘‘abundant.’’ Hamilton County, ‘‘ abundant in East Mill creek 
and Little Miami river,’’ Henshall, 1888; ‘‘ Vermillion river, 
scarce, not uncommon in Sandusky Bay,’’ McCormick, 1892; 
Maumee river system, taken in all the larg> streams (except St. 
Mary’s river) and nearly all the smaller ones, Kirsch, 1893; 
Franklin County, abundant, and of general distribution, William- 
son and Osburn, 1897; Big Jelloway creek system, common on 
ripples, Park:r, Williamson and Osburn, 1898; John’s creek at 
Waterloo, Huron river at Milan, Ashtabula creek, Wabash river 
at Celina, Stillwater creek at Dayton, North Fork of Licking 
river at Newark, R. C. Osburn, 1899; Mahoning river, E. B. 
Williamson, 1900 ; Cuyahoga river at Hawkins, Breakneck creek 
at Kent, Grand river at Painesville, Chagrin river at Willoughby, 
Wheeling creek at Bridgeport, Ohio river and McMahon creek at 
Bellaire, R. C. Osburn, 1goo. 
Genus:  BOLKOSOMA. 
Boleosoma nigrum (Rafinesque). JOHNNY DARTER. 
Head about 4; depth 5 to 6; eye 3% to4. D.IX-~-11 to 14; A. I, 7 tog; 
scales 5-44 to 55-9. Body fusiform, slender. Head moderate, snout some- 
what bluntly decurved; mouth small, lower jaw included. Cheeks and breast 
usually naked; opercles scaly. Anal spine short and weak; fins all high. 
