31. CYPRINIDJL MINNILUS. 
197 
large as the eye; dorsal, anal, and veutrals blackish at tip. Head 4^; 
depth 4. D. 8; A. 12; scales 9-40-4; teeth 2, 4-4, 2. L. 2^ inches. 
Kivers of Southern Wisconsin, etc. 
(LytJinirus cyanocephalas Copolaud, Froc. Acad. Nat. Sci. Puila. 1877, 70.) 
28'S'. M. ati'ipes (Jordan) Hay. 
Body moderately elongate, very strongly compressed and elevated. 
Head comparatively pointed. Mouth rather large, quite oblique, the 
maxillary reaching to the front of eye; lower jaw projecting. Bye 
small, shorter than muzzle, 4 in head. Scales closely imbricated, 
crowded anteriorly. Lateral line strongly decurved. Dorsal fin be- 
ginning midway between veutrals and anal, high anteriorly; pectorals 
not quite reaching veutrals; the latter to vent. Coloration of body 
dark bluish, without traces of vertical bars; sides not silvery, the scales 
dusted with dark puuctulations; dorsal with the usual black spot at 
base in front, smaller than in the other species; a black bar crosses its 
upper i)art; anal colored like the dorsal, the markings jialer; ventral 
fins dusky. Males i)rofusely tuberculate, and doubtless red in spring. 
Head 4^; depth 4. D. 7 ; A. 11; scales 0-52-5; teeth 2, 4-4, 2. L. 3 
inches. Southern Illinois. This species, and I'ossibly the preceding 
also, may be local varieties of iLT. diplemius. 
{ Lythrurus atripcs Jordan, Bull. Ills. Lab. Nat. Hist, ii, 59, 1878.) 
288. M. dipiseiiaitis (Eaf.) Hay. — Eed-fin. 
Body elongate, comiiressed, little elevated, the caudal peduncle nota- 
bly long. Head long, conic, rather pointed. Mouth large, moderately 
oblique, the i)remaxillary on the level of the pupil, the maxillary ex 
tending to opposite the ey<?, lower jaw somewhat projecting. Eye mod- 
eiate, about equal to muzzle, in head. Scales closely imbricated, 
crowded anteiiorly, the antedorsal scales about 30. Dorsal fin high, 
inserted about midway between veutrals and anal ; pectorals not reach- 
ing veutrals, the latter to vent; caudal fin long. Coloration dark steel- 
blue above; pale or silvery below; the males often showing traces of 8-10 
obscure cross-bars ; a conspicuous spot at base of dorsal in front ; the 
fins otherwise all plain. Males with the anterior dorsal region and the 
head i>rotusely covered with small whitish tubercles, the belly and 
lower fins being of a bright brick-red in the siiring. Females very pale 
olive, sometimes almost colorless. Head l^-; dex)th 4^. D. 7; A. 11; 
scales 9-47-3; teeth 2, 4-4, 2. L. 3J inches. Ohio and Upper Missis- 
sipi)i Valley and lake region ; generally abundant in small, clear streams. 
{Semoiilus diphmius Kal'. Icbtli. Ob. : llypsilepis dijEccmia Cope, Proc. Acad. Nat. Sci. 
Phila. 1807, 1(J'2 ; Jordau, Mau. Vert. 295. Lcuoiscus diplamius of Kirtlaud and of Giiu- 
tber ib Lujcilu!> conintux.) 
