254. No dark spot on dorsal fin; with two black crescents between nostrils; 



length about five and onchalf times depth; Mich, to N. Carolina 

 'J\lotropis photogenis (Cope) Silvery Minnow 

 With a dark spot on the dorsal fin; length about four to four and one' 

 half times depth 255. 



255. With a dark spot on the upper part of the front of the dorsal fin; fins 



red; Gulf states 



Lythrurus roseipinnis (Hay) Southern Redfin 

 (J\lotropis roseipmnis Hay) 

 With a dark spot at the base of the dorsal fin; fins red; N. Y. to Minn, 

 and southward to Arkansas 



Lythrurus umhratilis (Girard) Northern Redfin 

 7\[otropis umhratilis (Girard) 



256. With a dark spot at the base of the tail fin 257. 

 No dark spot at the base of the tail fin 264. 



257. Usually with ten or eleven rays in the anal fin 258. 

 Usually with seven to nine rays in the anal fin 261. 



258. No dark band across middle of dorsal fin 259. 

 With a dark band across middle of dorsal fin 260. 



259. Length about five times depth; sides silvery, with scales dark edged; east' 



central states to the Ozarks 



J^otropis micropteryx (Cope) 

 Length about four times depth; with a dark stripe along each side; chin 

 and top of head dark (If top of head before eyes has light coloring, see 

 A[. altipinms under Choice 228.) ; Carolinas 



'Slotropis scepticus (J. ^ G.) 



260. With a horizontal dark band on dorsal fin; blue above, with some red 



on fins and cheeks; length about three and onchalf times depth; 

 Georgia area 



Coccotis zonistius (Jordan) 

 (7\[otropi5 zonistius (Jordan) ) 

 With an oblique dark band on dorsal fin; brown above, with a reddish 

 stripe along each side; length about five times depth; Georgia and 

 Florida 



J^otropis metalhcus J. &' M. 



26L With a red stripe along each side; fins with red bars; Alabama Valley 

 Hydrophlox chrosomus (Jordan) 

 {J^otropis chrosomus (Jordan) ) 

 Lateral stripe obscure or purplish 262. 



262. Anal rays seven; fins of male red; Gulf States 



Hydrophlox roseus (Jordan) Rosy Fin 

 (J\[otropis roseus (Jordan) ) 

 Anal rays usually eight 263. 



263. Lateral stripe obscure; fins pale; length four to four and onchalf times 



depth; N. Y. to N. D. and southwards 



Hudsonius hudsonius (Clinton) Spottail 

 l^otropis hudsonius (Clinton) 



288 



