. Fig. 26. Distribution of Eptesicus fuscus pallidus in Colorado. For explanation of symbols, see p. 9. Eptesicus fuscus pallidus Young Eptesicus pallidus Young, Proc. Acad. Nat. Sci. Philadelphia, 60:408, 14 October 1908; type lo- cality, Boulder, Boulder Co., Colorado. Eptesicus fuscus pallidus, G. S. Miller, Jr., Bull. Nat. Mus., 79:62, 31 December 1912. Distribution in Colorado. — Statewide in suitable habitat (Fig. 26). Comparison.—For comparison with E. f. fuscus, the subspecies to the east, see remarks beyond. Measurements.—Average (and extreme) external measurements of 10 females,
. Fig. 26. Distribution of Eptesicus fuscus pallidus in Colorado. For explanation of symbols, see p. 9. Eptesicus fuscus pallidus Young Eptesicus pallidus Young, Proc. Acad. Nat. Sci. Philadelphia, 60:408, 14 October 1908; type lo- cality, Boulder, Boulder Co., Colorado. Eptesicus fuscus pallidus, G. S. Miller, Jr., Bull. Nat. Mus., 79:62, 31 December 1912. Distribution in Colorado. — Statewide in suitable habitat (Fig. 26). Comparison.—For comparison with E. f. fuscus, the subspecies to the east, see remarks beyond. Measurements.—Average (and extreme) external measurements of 10 females, followed by measurements of two males, from 1 mi. SW of Fort Collins are: (108-123), 105, 116; (45-52), 40, 40; (11-13), 10, 12; (15-18), 16, 14; (45-50), , ; weight, (), , Mean and extreme external measurements of five fe- males from New Castle, Garfield County, are: (98-117), (43-45), (9-11); —; (). Cranial measurements are presented in table 4. Remarks.—Since the subspecies E. f. palli- dus was described in 1908, there has been con- siderable confusion regarding the appropriate subspecific designation of specimens from Colorado, mostly because color was used as a primary diagnostic criterion. Cary (1911:210) noted the wide variability in color of speci- mens from Colorado, but thought that a single specimen, from Chimney Canon, Logan County, approached the pale color of pallidus: "Although nearly as pale as pallidus, this specimen has the measurements of fuscus, to which it is referred. Another specimen from Steamboat Springs has the dark coloration of fuscus, but in large size approaches ; In fact, E. f. pallidus averages smaller than E. f. fuscus in external and cranial dimensions (Howard, 1967). Warren (1942:26) assigned all Coloradan specimens except those from Boulder to E. f. fuscus. Of topotypes of palli- dus, Warren (1942:27) wrote: 'The colors are v
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