Fes., 1912. Mammats or ILtinois AND WISCONSIN — Cory. 361 
Subgenus LUTREOLA Wagner. 
Color nearly uniform all over; tail bushy; cusps of molars and 
premolars well developed; sectorial tooth of upper jaw with well- 
developed anterio-exterior cusp; frontal outline nearly straight, in adult 
developing sagittal crest; Palmer pads largely bare; toes partly webbed.* 
Putorius vison lutreocephalus (Harran). 
Minx. Harwan’s MINK. 
Mustela lutreocephalus HARLAN, Fauna Americana, 1825, p. 63. 
Putorius vison LAPHAM, Trans. Wis. State Agr. Soc., II, 1852 (1853), p. 338 (Wis- 
consin). KEnwnicort, Trans. Ill. State Agr. Soc., 1853-54 (1855), p. 578 (Cook 
Co. Illinois). Jb., Agr. Rept. for 1857, U. S. Patent Office Rept., 1858, p. Io1. 
Mites, Rept. Geol. Surv. Mich., I, 1860 (1861), p. 220 (Michigan). STRONG, 
Geol. Wis., Surv. 1873-79, I, 1883, p. 437 (Wisconsin). Herrick, Geol. & Nat. 
Hist. Surv. Minn., Bull. No. 7, 1892, p. 118 (Minnesota). EVERMANN & BUTLER, 
Proc. Ind. Acad. Sci., 1893 (1894), p. 137 (Indiana). 
Lutreola vison Ruoaps, Proc. Acad. Nat. Sci. Phila., 1896 (1897), p. 198 (Tennessee). 
SNYDER, Bull. Wis. Nat. Hist. Soc., Il, 1902, p. 125 (Wisconsin). 
Lutreola vison lutreocephalus Haun, Ann. Rept. Dept. Geol. & Nat. Resources Ind., 
1908 (1909), p. 581 (Indiana). 
Putorius lutreolus ALLEN, Proc. Bost. Soc. Nat. Hist., XIII, 1869 (1871), p. 183 
(Iowa). 
Type locality — Maryland. 
Distribution — Greater portion of North America, north to about 
latitude 52°, except in the Southeastern states from Tennessee and 
North Carolina southward where it is replaced by P. v. vulgivagus; 
and somewhere north of Pennsylvania and east of the Great Lakes 
where it intergrades with P. vison. The limits of its northeastern 
range have not been definitely determined. 
Description — General color nearly uniform umber brown; dorsal area 
usually darker than the sides; tail dark brown or blackish brown; chin 
white and usually an irregular white spot on chest; rest of under 
parts brown occasionally with one or more irregular white patches 
on belly. Individual specimens vary greatly in size and the females 
are decidedly smaller than the males, but may always be distin- 
guished from Weasels by the brown belly and more bushy tail. 
Measurements — Total length (male), generally from 23.50 to 25 in. 
(500 to 627 mm.); tail vertebra, 7 to 8.25 in. (178 to 209 mm.); 
hind foot, 2.50 to 2.75 in. (63 to 70 mm.). 
* Considered a full genus by some authorities. 
