a. Mustela frenata macrophonius, ♀ ad., 132528, U. S. Nat. Mus., Pérez, Veracruz.
b. Mustela frenata tropicalis, ♀ ad., 54993, U. S. Nat. Mus., Jico, Veracruz.
c. Mustela frenata perda, ♀ sad., 65422, U. S. Nat. Mus., Catemaco, Veracruz.
d. Mustela frenata meridana, ♀ ad., 143665, U. S. Nat. Mus., Mérida, Venezuela.
e. Mustela f. macrura, ♀ ad., 564, M. P. H. N., type of Mustela jelskii, Cutervo, Perú.
f. Mustela frenata agilis, ♀ sad., 21147, Field Mus. Nat. Hist., Macate, Perú.
g. Mustela frenata gracilis, ♀?, ad., 12431, Amer. Mus. Nat. Hist., type, Conard Fissure, Arkansas, Pleistocene.
h. Mustela a. stolzmanni, ♀ sad., 24.12.12.24, Brit. M. N. H., Myobamba, Perú.
Figs. i-l. Mustela frenata nevadensis, all males, from Colorado, showing seasonal change in color, × approximately 1/9. Note the sharply marked molt line in the pelage of spring and the absence of any definite molt line in autumn.
i. No. 151415 U. S. Nat. Mus., Coventry, December 27, 1907.