1936] 



MAMMALS OF OREGON 



359 



FIGURE 86. Range of Trowbridge's and Yosemite 

 shrews in Oregon : 1, Sorex trowbridgii trowbridgii; 

 2, 8. t. mariposae. Type locality circled. 





common than the brown bairdi, with which they were associated. In 

 1897 A. K. Fisher trapped for them at the type locality and caught 

 one at the entrance of a small hole near a stream. 



At Vida and McKenzie Bridge the writer found them one of the 

 commonest small mammals in the woods, obtaining sometimes a 

 dozen specimens in a line of small traps set under logs and banks, or 

 around old stumps and 

 roots of trees. They 

 seemed to be attracted by 

 the rolled oats used as bait 

 for meadow mice and 

 other rodents, but many 

 of the traps were baited 

 also with bits of fresh 

 meat. 



On Mount Hood, Cant- 

 well collected several spec- 

 mens at 1,500 feet altitude 

 in the dry forest above 

 the lava beds. One found 

 under a flake of bark was 

 caught in his hands, but 

 it put up a lively fight 

 with much, squealing and 

 finally squirmed out and escaped as if by magic. The strength of 

 the little creature was surprising. At Philomath, Cantwell took 

 several specimens on hillsides in heavy timber but did not find them 

 on the lowlands. 



SOREX TROWBRIDGII MARIPOSAE GRINNEIJ, 



YOSEMITE SHREW 

 Sorex montereyensis mariposae Grinnell, Calif. Univ. Pubs., Zool. 10 : 189, 1913. 



Type, Collected in Yosemite Valley, at 4,000 feet altitude, Mariposa County, 

 Calif., May 27, 1911, by H. W. Grinnell. 



General characters. Size medium, slightly smaller than typical trowbri&ffii, 

 with paler more grayish coloration. Upper parts of adults sooty or dark 

 brownish gray, lower parts distinctly paler, or silvery gray; feet pale, tail 

 long, sharply bicolor. Summer and immature specimens decidedly brown. 



Measurements. Type specimen, adult female from Yosemite: Total length, 

 121 mm ; tail, 51 ; foot, 14. Adult male topotype : 120 ; 53 ; 15. 



Distribution and habitat. Extreme south-central Oregon and 

 south through the Sierra Nevadas to Kaweah Eiver and through the 

 inner Coast Ranges to Mendocino County, Calif, (fig. 86). There are 

 Oregon specimens from Swan Lake Valley, Klamath County ; Lake- 

 view, Lake County; and Beswick, just below the Oregon line in 

 California. All of these are from Transition Zone localities, and the 

 whole range of the subspecies seems to be largely in this zone. 



At Swan Lake Valley, just over the ridge east of Klamath Falls, 

 in June 1889, two of these little long-tailed dark-colored shrews were 

 taken on the bank of the little spring brook that comes out above 

 the ranch, and Elmer Applegate told the writer that he had often 

 caught them in the irrigated meadow below. This seems to be the 

 only Oregon note on the species, but farther south specimens have 

 been collected along streams, in meadows, and in various locations 



