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UNIVERSITY OF KANSAS PUBLICATIONS MUSEUM OF NATURAL HISTORY Vol. 4, pp. 1-466, plates 1-41, 31 figures in text December 27, 1951
UNIVERSITY OF KANSAS PUBLICATIONS, MUSEUM OF NATURAL HISTORY
Editors: E. Raymond Hall, Chairman, A. Byron Leonard, Edward H. Taylor, Robert W. Wilson
Vol. 4, pp. 1-466, plates 1-41, 31 figures in text
PRINTED BY FERD VOILAND, JR., STATE PRINTER
[Illustration: PLATE 1. Coloration of head and foreparts in ten subspecies of long-tailed weasel, _Mustela frenata_. All figures are of males, approximately × 1/2.
In regions of heavy rainfall (see figs. 2 and 3) there is an increase in pigmentation and extent of blackish color backward over the neck and a decrease in extent of the white facial markings. In regions progressively more arid (see figs. 3 to 7) there is a decrease in pigmentation and extent of blackish color and an increase in extent of the white facial markings.
As shown by rearing mammals from humid regions in arid regions, and _vice versa_, the color is not visibly altered in one or a few generations; the color is an hereditary character. Beginning with the southernmost subspecies (fig. 1) and continuing northward to the northern subspecies (fig. 10) there is a darkening, next a lightening, and finally a darkening closely conforming to amounts of precipitation in the geographic regions concerned. A fuller discussion of this correlation is given on page 51.]
[Illustration: FIG. 1. Map showing localities of capture of specimens depicted in plate 1.]
DISPARITY IN NUMBERS OF MALES AND FEMALES 19
MATERIALS, ACKNOWLEDGMENTS AND METHODS 21
VARIATION 24 Variation with Age 24 Secondary Sexual Variation 26 Individual Variation 28 Seasonal Variation 30 Variation in Coloration and Molt 30 Variations of Taxonomic Worth 44
HISTORY OF CLASSIFICATION 69 Chronological List (annotated) of Specific and Subspecific Names Applied to American Weasels 71