ETHEOSTOMID^E. LXXXIX. 219 



3. NOTHQNQTUS, Agassiz. TROUT DARTERS. 



1. N. niger, (Raf.) Jordan. TROUT DARTER. BLUE- 

 BREASTED DARTER. Dark olive; head blackish above; 

 breast and throat deep blue; sides greenish, sprinkled 

 with carmine dots, much as in a trout; series of oliva- 

 ceous lines along the rows of scales; vertical fins chiefly 

 orange at base with a bright blue edging, in $ merely 

 speckled; lateral line nearly complete; D. XII 13 

 (D. X, Raf. Kirt.); A. II, 8; length 2J inches. Ohio 

 Valley, not common, one of the handsomest of our fishes; 

 the coloration is often quite dark. [C. maculatus, (Kirt.) 

 Jordan.] I have hitherto referred this genus to Catonotus, 

 but the two genera must either be . kept separate or 

 both united with Poecilichthys. 



2. N. punctu/atus, Ag. DOTTED DARTER. Greenisn, 

 mottled with black; fins all dotted; D. IX 13; A. II, 8. 

 Mo.; Ark. (Boleichthys whipplei, Grd.) 



4. P(ECILICHTHYS, Agassiz. RAINBOW DARTERS. 



= Astatichthys, Le Vaillant. 



1. P. c&ruleus, (Stor.) Ag. BLUE DARTER. RAIN- 

 BOW FISH. BLUE JOHNNY. Olivaceous, tessellated above, 

 the spots running together into blotches ; back without 

 black lengthwise stripes; sides with about twelve indigo 

 blue bars running obliquely downward, most distinct 

 behind, separated by rich orange interspaces; caudal 

 deep orange, edged with bright blue; anal orange, with 

 deep blue in front and behind; soft dorsal chiefly orange, 

 blue at base and tip; spinous dorsal crimson at base, 

 then orange, with blue edgings; ventrals bluish, often 

 deep indigo blue ; cheeks blue ; throat and breast orange, 

 these two shades very constant; $ much duller, with but 

 little or no blue or orange, the vertical fins barred or 



