126 VERTEBRATE ANIMALS OP THE UNITED STATES 



from the back to the lateral line and 8 or 9 dusky quadrate lateral 

 blotches; rays of dorsal fins XI or XII-13; anal II, 10; scales 6-52 to 

 60-10: southern Indiana to Arkansas; not rare. 



H.roanoka (Jordan & Jenkins). Length 60 mm.; head 4; depth 4.75;. 

 color light yellow, with dark green markings and 10 or 11 vertical green 

 lateral confluent bars; anterior dorsal fin with a median band of bright 

 yellow; female pale; rays of dorsal fins X or XI-ii; anal II, 8 or 9; 

 scales 5-48-9; body robust: southern Virginia and North Carolina; 

 common. 



H. evides (Jordan & Copeland). Length 75 mm.; head 4.3; depth 

 5.3; color extremely brilliant, olivaceous or yellow above, mottled with 

 darker with about 7 broad transverse green (male) or black (female) 

 bars extending from the back down the sides, connected by an orange- 

 brown lateral line; rays of dorsal fins XI-io; anal II, 8 or 9; scales 9-52 

 to 67-9 to 11; cheeks not scaly: Indiana, in the Maumee and Wabash 

 basins, to central Iowa; southward to Arkansas and North Carolina; 

 often common. 



H. scierus Swain. Length 75 mm.; head 4 to 4.8; depth 5 or 6; color 

 yellowish olive, everywhere vaguely blotched with black; top of head, 

 dorsal anal and caudal fins black; preopercle serrate; cheeks and opercles 

 scaly; gill membranes united; rays of dorsal fins XIII-13 or 14; anal 

 II, 9; scales 7-68 to 70-17; fins very large: northern Indiana to Ten- 

 nessee and Texas. 



H. nigrofasciatus Agassiz. Length 150 mm.; head 4; depth 5; color 

 dark olive; sides with 12 narrow vertical bars, confluent along the 

 middle; no red or blue; body stout, compressed; fins large; dorsal fins 

 XII-ii or 12; anal II, 9 or 10; scales 7-58-15 : South Carolina toLouisiana,, 

 in larger clear streams; often common. 



5. Hypohomus Cope. Darters. Similar to Hadropterus, but with 

 belly covered with scales similar to those on the sides: about 5 species,, 

 all quite rare. 



Key to the Species of Hypohomus 



ai Gill membranes broadly united H. squamatus. 



a.1 Gill membranes scarcely united. 



bi Scales in the lateral line about 100 H. auranliacus. 



hi Scales in the lateral line about 65 H. cymatotcenia. 



H. squamatus (Gilbert & Swain). Length 125 mm.; body elongate; 

 head 3.7; depth 5.5; color yellowish olive, with 10 broad dusky bars 

 across the back, and an equal number along the lateral line; a conspicu- 

 ous black shoulder spot; rays of the dorsal fins XIV-13; anal II, 10; 



