222 Bulletin 4Y, United States National Musemn. 



Leitcosomus rholheus, Coi'E, Proc. Ac. N;it. Soi. Thila., 1801, ."/ri, Brandy wine Creek and Ran- 



cocosCreek, tributaries of the Delaware River. 

 SqKaliiin hyalope, Coi'E, Proc. Ac. Nat, Sci. Phila., 1S04, 280, Conestoga River, Pa.; young. 

 Clu'iloncvius]iidchcUns, Stoeeh, Fishes Mass., 28G, 1867. 

 Leiiamwms piiIchdlHs, Gi'NTUER, Cat., vii, 208, 1808. 

 SemotUus bullarU:, Jokdan & Gilbert, Synopsis, 222, 1883. 



Subgenus SEMOTILUS. 



355. SEMOTILUS ATKOMACULATUS (MitcLill). 



(nORNKIl-DACE ; CrEEK-CHUB.) 



Head 31; depth 4; eye about 5. D. 7; A. 8: scales <)-55-6, those in 

 lateral line varying from 50 to 60 or even more, the number greatest in 

 northern examples ; teeth 2, 5-i, 2. Body stout, the dorsal outline arched 

 in front of the dorsal, the body tapering backwards from a point consider- 

 ably in advance of the dorsal, so that the base of that tin is oblique. 

 Head large and heavy, broad and rounded above; snout broad; mouth 

 broad, oblique, lower jaw slightly included, the upper lip just below 

 level of pupil ; maxillary barely reaching front of pupil ; maxillary bar- 

 bel small, not evident in specimens of less than 2 or 3 inches in length. 

 Eye rather small. Scales small, considerably crowded, and reduced 

 anteriorly; about 30 series in front of the dorsal fin. Lateral line consider- 

 ably decurved. Fins small ; the dorsal well behind ventrals, inserted 

 behind fifteenth vertebra, its last ray well in advance of base of anal. 

 Color dusky bluish above; sides with a vague, dusky baud, black in the 

 young, disappearing in the adult; belly creamy, rosy-tinted in males 

 in spring ; dorsal fin always with a conspicuous black spot at the base in 

 front, which is bordered with red in the male; a dark vertebral line; 

 scales everywhere edged with dark puuctulations ; a dusky bar behind 

 opercle ; males with snout coarsely tuberculate in spring. Young with a 

 small black caudal spot. Length 10 inches. Maine (Freeport; Kendall 

 Smith) and western Massachusetts (Housatonio River, Jordan), to 

 southern Missouri, Wyoming, and Canada; everywhere abundant; 

 chiefly in small brooks, where it is often the largest and most voracious 

 inhabitant, (rt^er, black; macula, spot.) 



Oyprinus atromacnlalii.% Mitchill, Amer. Monthly Mag., ii, 1818, 324, Wallkill River. 



Semotilvs dorsalit, Rafinesque, Ichth. Oh., 49, 1820, Kentucky River. 



Seniotilus ecphabts, Bafinesque, Iclith. Oh., 49, 1820, Ohio River. 



Semotilm di2)lemins, Rafinesque, Ichth. Oh., 49, 1820, Ohio River. 



Leitciscus iris, Cuvier & Valenciennes, Hist. Nat. Poiss., xvii, 255, 1844, New York and Caro- 

 lina. 



LeucUciis storeri, Cuvier & VALrNciENNES, xvii, 255, 1844, New York. 



Leuciscus pulchelloides, Ayres, Proc. Bost. Soc. Nat. Hist., 1849, laT, Connecticut. 



Lencosovms pallidns, Giuarb, Proc. Ac. Nat. Sci. Phila., 1856, 190, (lateral lino 52), Antelope 

 Creek, Arkansas. (Coll. Kennerly.) 



Leucosomus inenissatuK, Girard, I. c, 1856, 190, (lateral line 64), Choctaw Agency. (Coll. 

 MiiUhausen.) 



SemoUUisviacrocephalm, Giuard, 1. c, 1S5G, 204, Fort Pierre, Nebraska. (Coll. Evans.) 



Semotilm speciosiis, Girard, I. c, 1856, 2ll4, Sweetwater River, Nebraska. (Coll. Bowman.) 



SemotUus hammnndi, Abbott, Proc. Ac. Nat. Sci. Phila., 1860, 474, Kansas. (Coll. Hammond.) 



SemotUus corporalh, Jordan & Gilbert, Synopsis, 221, 1883; Coi'E, Cyp. Penu., 363, 1866; not 

 Ciiprinvs cnrporalix, Mitchill. 



Leucosvmus co)poralis, GuNTliER, Cat., vii, 269, 1868. 



SemotUus atromaculalus, Bicknell & Drebslar, Proc. Ac. Nat. Sci. Phila., 1885, 16. 



