BULLETIN FLORIDA STATE MUSEUM


rest of the body, and present a definite golden caste in life (Raney,
1940a: pls. 1-4). The golden color disappears shortly after death,
and the stripes again appear darker than the surrounding areas. Sim-
ilar changes have been noted by Lachner (1952: 438) for Hybopsis
biguttata. Other sexual differences are present at all seasons: The
adult male has a deeper and more compressed head and body, longer
pectoral and pelvic fins (table 6), a greater amount of fatty tissue on
the fins, and reaches a larger maximum size (Raney, 1940a: 5).
 DISTIBUTION. Occurs over a large part of the northern half of
the United States and southern Canada from northeastern Colorado,
southeastern Wyoming, eastern parts of North and South Dakota and
southeastern Saskatchewan eastward in the southern parts of the Hud-
son Bay drainage, the upper Mississippi and Ohio valleys, and the
Great Lakes-St. Lawrence drainage to the Atlantic coast as far south
as south-central Virginia.
 On the Atlantic slope it ranges from the Gasp6 Peninsula and
Nova Scotia as far south as the James River system in Virginia; it is
common in the St. Lawrence and Great Lakes drainages and occurs
in the southern part of the Hudson Bay drainage. The northern-
most record is from a tributary of the Red River of the North in Man-
itoba (Keleher, 1956: 265); the westernmost records are from Wyoming
and Colorado. As indicated by Radforth (1944: 89) the northern
limits of its range coincide closely with the 650 F. July isotherm.
It occurs in the upper part of the Mississippi River drainage, including
parts of the Missouri and Ohio systems, but is not recorded from the
Missouri River system in Montana, and is known from this system
in North and South Dakota only from the James River and other
eastern tributaries. It occurs sparingly in the lower Missouri system
of Nebraska, Iowa, and Missouri, with most records in central Mis-
souri. In the Platte system it is known mostly from upland tributaries
in northeastern Colorado, southeastern Wyoming, and western Ne-
braska, with a few scattered records from the lowest parts of this
drainage. In the Kansas River system it is abundant in places, the
westernmost records being from isolated spring-fed streams. It is
absent from the greater part of the Ohio River system, but is found
in headwater tributaries in Indiana, Ohio, Pennsylvania and New
York, being especially common and widespread in the Allegheny and
Shenango drainages of New York and Pennsylvania. Isolated relict
populations occur to the south in the lower Kanawha River system of
West Virginia (Paint Creek, Fayette County), and in a tributary of
the middle part of the White River in Indiana (Mill Creek, Hendricks
and Morgan counties).


Vol. 8