330. With one anal spine 331, 

 With two spines in the anal fin 332. 



331. Dorsal fins with nine or ten spines and eleven to thirteen rays; head 



scaled; Alabama 



Psychromaster tuscumhia (G. &' S.) Tuscumbia Darter 

 Dorsal fins with seven or eight spines and eight to ten rays; head bare; 

 Ark. to Texas 



Alvarius fonticola J. & G. 



332. Gill membranes broadly joined across the isthmus (fleshy part between 



the gill openings) ; usually with an enlarged black scale on the shoulder 



333. 

 Gill membranes scarcely connected 334. 



333. Lower jaw projecting much beyond the upper; colors rather plain; dorsal 



spines of male with fleshy knobs at their tips; New England to N. C. 

 and Arkansas 



Catonotus flahellaris (Raf.) Fan-tailed Darter 

 Poecihchthys flahellaris (Raf.) 

 Jaws about equal; with red or orange spots on sides and with bands on 

 the fins; no fleshy knobs on dorsal spines; Arkansas valley 

 Claricola whipplii (Girard) Whipple's Darter 

 (Poecilichthys whipplii (Girard) ) 



334. Lateral line arched upwards anteriorly; first dorsal fin over three'fourths 



height of second dorsal fin 335. 



Lateral line fairly straight; dorsal fins various 339. 



335. Shortest distance from lateral line to mid'dorsal area about oncfifth 



depth of body 336. 



Shortest distance from lateral line to mid-dorsal area about one-sixth 



depth of body 337. 



336. Lateral line ending below first dorsal fin, which has a broad orange band; 



with an orange lateral band on body; N. Y. to Colorado 

 Oligocephalus iowae (J. ^ M.) Iowa Darter 

 Pocc\l\ch.thys exilis (Girard) 

 Lateral line ending below second dorsal fin; first dorsal fin with a fine 

 orange line; body colors plainer; Michigan to Texas 



Oligocephalus jessiae (J. 5?B.) Jessie's Darter 

 Poecilichthys jessiae J. &" B. 



337. Parietals (on top of head behind eyes) scaled; body dark brown and 



green; southeastern U. S. 



Hololepis harratti Holbrook 

 Parietals scaleless 338. 



338. Gill membranes little connected; breeding males with a red band on first 



dorsal fin; Indiana to Texas 



Boleichthys gracilis (Girard) 

 Hololepis gracilis (Girard) 

 Gill membranes somewhat more connected; with yellow rather than red 

 in coloration; eastern states 



Boleichthys fusiformis (Girard) Fusiform Darter 

 Hololepis fusiformis (Girard) 



298 



