182 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



L. 3^ iucbes. Alabama Basiu ; abnudant in clear streams, with tbe 

 preceding' and tbe next. 



{Codoma trichroistia Jordan &. Gilbert, BuU.U. S. Na,t. Mus. xii, 1878, 50.) 



II. Adult males without red. 



m. A very conspicuous black spot at base of caudal. 



353. C. stigmatura .Jordan. — Spotted-tail Minnow. 



Body elongate, fusiform, compressed. Head quite long, rounded 

 above, tbe snout pointed. Moutb ratber large, somewbat oblique, over- 

 lapped by tbe narrow npper jaw. Eye small, 4| in bead; iris wbite. 

 Maxillary reacbing beyond nostrils; i)remaxillary on tbe level of lower 

 edge of pupil. Scales large, closely imbricated, 20 in front of tbe dor- 

 sal. Fins low, tbe dorsal ratber bebind ventrals, its beigbt less tban 

 one-fiftb tbe lengtb of tbe body. Color ijale, clear olive ; black dorsal 

 spot not very distinct ; fins witb tbeir tips cbarged witb satin- wbite 

 pigment, otberwise plain ; a very distinct, large, oblong or quadrate jet- 

 black spot at base of caudal, tbe color extending up on tbe rays. Tbis 

 Spot is visible on all specimens, and is larger tban in any otber of our 

 Cyprinidw ; its lengtb about one-tbird tbat of tbe bead. First ray of 

 dorsal dark in front; males witb an obsolete black spot on tbe middle 

 of tbe sides in front of tbe dorsal, as is often seen in Charaeinidw, tbe 

 bead, etc., tuberculate in spring. Head 4i; deptb 4 J. D. 8; A. 8; 

 scales 7-42-3; teetb 1, 4-4, 1. L. 4J incbes. Alabama and Mississippi; 

 very abundant. Tbe largest species of tbis section of tbe genus and 

 one of tbe most graceful. 



(rhotof/eins stigmaturus Jordan, Ann. Lye. Nat. Hist. N. Y. 1876, 337 : Codoma st'ujma- 

 tnra .Jordan, BuU. U. S. Nat. Mus. xii, 52 : Luxilus chicasacensinllaj, Proc. U. S. Nat. Mus. 

 1880,506.) 



mm. No conspicuous black spot at base of caudal. 



354. C. Cccrulea Jordan. 



Body fusiform, somewbat elongate, moderately compressed. Head 

 moderate. Snout ratber pointed, overlapping tbe small, oblique moutb, 

 maxillaries reacbing nostrils, premaxillaries below level of pui^il. Eye 

 moderate, 3| in bead. Scales firm, 15 in front of dorsal. Lateral liue 

 decurved. Fins all bigb, tbe beigbt of tbe dorsal nearly one-tiftb tbe 

 lengtb of tbe lisb; dorsal bebind ventrals. Males witb tbe snout 

 tbickly tuberculate. Color brigbt steel-blue; tbe sides and belly sil- 

 very wbite ; a very distinct lateral band of a brigbt blue-green color, 

 most distinct posteriorly, and forming a spot at tbe base of tbe caudal 

 fin ; dorsal blotcb ratber faint and diffuse ; tips of dorsal, anal, and 



