31. CYPRINID^ MINNILUS. 197 



large as the eye; dorsal, anal, and ventrals blackish at tip. Head 4^; 

 depth 4. D. 8; A. 12; scales 9-4G-4; teeth 2, 4-4, 2. L. 2^ inches. 

 Kivers ot Southern Wisconsin, etc. 



(Li)tluurun cyanocephalus Coi^clauA, Proc. Aciul. Nat. Sci. Pbila. 1877, 70.) 

 a §7. ITI. atripcs (Jordan) Hay. 



Body moderately elongate, very strongly comi)ressed and elevated. 

 Head coiui)aratively i^oiuted. Mouth rather large, quite oblique, the 

 maxillary reaching to the front of eye; lower jaw projecting. Eye 

 small, shorter than muzzle, 4 in head. Scales closely imbricated, 

 crowded anteriorly. Lateral line strongly decurved. Dorsal fin be- 

 ginning midway between ventrals and anal, higli anteriorly; pectorals 

 not quite reaching ventrals; the latter to vent. Coloration of body- 

 dark bluish, without traces of vertical bars; sides not silvery, the scales 

 dusted with dark punctulations; dorsal with the nsual black spot at 

 base in front, smaller than in the other species ; a black bar crosses its 

 upper part; anal colored like the dorsal, the markings paler; ventral 

 lins dusky. Males profusely tuberculate, and doubtless red in spring. 

 Head 4^; depth 4. D. 7; A. 11; scales 0-52-5; teeth 2, 4-4, 2. L. S 

 inches. Southern Illinois. This species, and possibly the preceding 

 jilso, may be local varieties of M. dijjlemiiis. 



( Lijt lint run utriptti Jordan, Bull. Ills. Lab. Nat. Hist, ii, 59, 1878.) 

 ass. ITI. di]>la;inius (Kal.) Hay. — lied-fin. 



liod;^ elongate, compressed, little elevated, the caudal peduucle nota- 

 bly long. Head long, conic, rather pointed. Mouth large, moderately 

 <)bli«iue, the premaxillary on the level of the pui)il, the maxillary ex 

 linding to opposite the eye, lower jaw somewhat projecting. Eye mod- 

 erate, about equal to muzzle, 3-^ in head. Scales closely imbricated, 

 crowded anteriorly, the antedorsal scales about 30. Dorsal fin high, 

 iii.'^evted about midway between ventrals and anal; pectorals not reach- 

 ing ventrals, the latter to vent; caudal fin long. Coloration dark steel- 

 blue above; pale or silvery below; the males often showing traces of 8-l(> 

 olKscure cross-bars ; a conspicuous si)ot at base of dorsal in front ; the 

 liiis otherwise all i)laiu. Males with the anterior dorsal region and the 

 head juofusely covered with vsmall whitish tubercles, the belly and 

 lower fins being of a bright brick-red in the spring. Females very pale 

 olive, sometimes almost colorless. Head 4^ ; dei)th 4|. D. 7; A. 11; 

 scales U-47-3; teeth 2, 4-4, 2. L. .'V^ inches. Ohio and UpiJer Missis- 

 bippi Valley and lake region; generally' abundant in small, clear streams. 



{Semotilun diplcmiun Rat". IcLth. Oh. : Uypa'depis diplwmia Cope, Proc. Acad. Nat. Sci. 

 Phila. 1807, Hi2 ; Jordan, Man. Vert. 290. Leuciscuti dqihcmius of Kirtlaud and of GUu- 

 thcr ib LuxUiiif Lonntlu<. ) 



