1936] 



MAMMALS OF OREGON 



371 



FIGURE 92. Range in Ore$ 

 nen#is saturatus; 2 



n of: 1, Myotis ytima- 

 M. y. 



southern California; eastward to the Bitterroot Valley, Mont. (fig. 

 92). 



Eight skins and skulls from Klamath Falls, Oreg., from the 

 University of California collection, and 2 alcoholics from Lone 

 Rock east of the lower John Day River, are referred to this form 

 by Miller and Allen (1928 , p. 69). In the Jewett collection are 3 

 males taken at Molin, Klamath County, on September 27, 1926, 

 and 9 specimens taken from a large colony in an old cabin at Spring- 

 ers Ranch, close to Malheur Lake, on June 10 ? 1922. They undoubt- 

 edly range all over eastern Oregon in the semiarid part of the State. 

 Near Lone Rock, in the 

 valley bounded by lava 

 cliffs, they were common 

 and after some waste of 

 ammunition 2 specimens 

 were secured in the even- 

 ing of June 16, 1896. 



General habits. Prac- 

 tically nothing has been 

 recorded on the habits of 

 this species in Oregon, 

 but at the type locality 

 in Kern County, Calif., 

 Grinnell, July 21-25, 1904, 

 secured a series of 61 

 specimens in and around 

 the ruins of Old Fort 

 Tejon. Of these 33 were adult females, the rest nearly grown young 

 of the year of both sexes, indicating a breeding colony (Grinnell, 

 1918, p. 78). On September 3, 1920, Howell \19W, p. 173) esti- 

 mated at least 1,000 of these bats under the iron roof of an old 

 adobe storehouse at Old Fort Tejon, but in the series of specimens 

 collected no adult males were found. On September 23 he found 

 only 200 left in the colony and on December 16 all had departed. 

 He says " beyond doubt this form is entirely migratory." 



Grinnell records one of these bats taken in the San Bernardino 

 Mountains June 28, 1905, but does not give the sex (1908, p. 158). 

 Glover M. Allen reports a male taken at 11,000 feet on Mount Whit- 

 ney on July 16, 1919, and another male at Lone Pine a few days later 

 (1919, pp. 1-2) . The males, free from family cares probably wander 

 widely in summer. 



Their winter resorts are not known but probably both sexes gather 

 in large numbers in caves for hibernation. 



Breeding habits. Little is known of the Tejon bats' breeding 

 habits except that they breed in considerable colonies and have one 

 young each. Large breeding colonies have been found in buildings 

 or bridges at Old Fort Tejon, Tulare, and Eagle Lake, Calif., and at 

 Corvallis, Mont. 



At Eagle Lake, in northeastern California, on June 24, 1906, Sterl- 

 ing Bunnell found a colony of these bats in an attic where Jie esti- 

 mated 1,000 or 2,000 individuals, but found no young. If this was a 

 breeding colony the young were probably not yet born. 



At Corvallis in the Bitterroot Valley, Mont., Bernard Bailey found 

 a breeding colony of several hundred of these bats between the tun- 



