York.

Range.—From southern Quebec and southern Ontario south to southern Ohio and West Virginia; from the Atlantic Coast west into Wisconsin. Marginal occurrences are: Minnesota: St. Peter (Swanson and Evans, Jour. Mamm., 17:39, 1936); Marine (Swanson, Tech. Bull. No. 2, Minnesota Dept. Conservation, p. 60, 1945). Wisconsin: Hurley (Greeley and Beer, Jour. Mamm., 30:198, 1949). Quebec: Joliet (Anderson, Nat. Mus. Canada, Biol. ser. No. 31, Bull. 102:30, 1946). Vermont: Brandon (Osgood, Jour. Mamm., 19:436, 1938). Maine: No locality more precise than the state (Allen, Occ. Papers Boston Soc. Nat. Hist., 7(3):35, June, 1904). New York: Hastings on Hudson (Rowley, Abstr. of Proc. Linnean Soc. N. Y., for yr. ending March 11, 1902, p. 57). Pennsylvania: Beaver (Rhoads, Mamms. Pa. and N. J., 1903, p. 211). West Virginia: Cornwall's Cave (Frum, Jour. Mamm., 25:195, 1944). Ohio: Cat Run (Bole and Moulthrop, Sci. Publs. Cleveland Mus. Nat. Hist., 5(6):116, 1942); Symmes Creek (Bole and Moulthrop, loc. cit.); Dry Cave (Bole and Moulthrop, loc. cit.); "Union County" (Rausch, Jour. Mamm., 27:275, 1946). Wisconsin: Devils Lake (Jackson, Jour. Mamm., 1:38, 1919).

Diagnosis.—"... color duller and less yellow, and dark tips of shorter hairs on back more conspicuous" than in P. subflavus subflavus according to the original description.

Remarks.—No one, as far as we know, has carefully studied the variation in Pipistrellus subflavus of the United States and Canada since Miller named P. s. obscurus. With the more abundant material now available, such an appraisal would be worth-while. The occurrences cited above for Minnesota and Wisconsin were recorded in the literature under the specific name without indication of subspecific affinity. The reference of specimens from these states to the subspecies P. s. obscurus is an arbitrary assignment on our part; we have not seen them. However, two specimens in the University of Kansas Museum of Natural History from Potosi (Snake Cave) Grant County, Wisconsin, are referable to P. s. obscurus. These provide the southwesternmost record station of occurrence in Wisconsin but are not shown on the distribution map because the specimens were received after figure 1 was prepared.

It is noteworthy that the species Pipistrellus subflavus has not yet, as far as we can ascertain, been recorded from Michigan, northern Indiana, northern Illinois, or Iowa. Probably the species occurs in these areas.