BATS 57 



individuals of the Long'-legged Bat were taken during the daytime from 

 their resting places on a pine tree. At Walker Lake a bat of this species 

 was shot on the evening of September 11, 1915, at 6:52 p.m., from among 

 several which were flying down the canon high over the aspens and sage- 

 brush. These bats were probably going from their daytime resting places 

 in the forest to some especially productive forage area farther down the 

 valley. 



A female Long-legged Bat taken at Dudley on July 16, 1920, gave 

 evidence of having recently suckled young; and on August 1, a young 

 individual, nearly full-grown, was taken there. This young animal was 

 clothed in hair of somewhat softer texture and more grayish color than 

 that of the adults. 



Fringed Bat. Myotis thysanodes Miller 



Field characters. — Slightly larger than Little California Bat, much smaller than 

 Large Brown Bat. Total length 3i/^ inches (80-87 mm.), tail about IV^ inches 

 (37-40 mm.), hind foot y?, inch (8-9 mm.), ear % inch (14-16 mm.). Coloration dull 

 yellowish brown above, paler on under surface, flight membranes, ears, and muzzle 

 blackish. A fringe of fine hairs along edge of membrane on each side of tail toward 

 tip is distinctive. 



Occwrreiice.— Taken only near Dudley, 6 miles east of Coulterville ; altitude 3000 feet. 



The Fringed Bat has been taken but a few times in California, and it 

 is not yet possible to give its range, forage habits, or other characteristics 

 with any degree of satisfaction. In the Yosemite region this bat was found 

 only in the neighborhood of Dudley, which is near the western margin of 

 the yellow pine belt. One immature specimen was shot at dusk at a deer 

 lick a little north of Dudley. Another was routed out of the deserted build- 

 ing at the McLaughlin mine where the group of Little California Bats 

 was found. This specimen was started from its retreat by our pounding 

 on the walls. A third individual was jarred out of a loose shake roof in 

 an old building at the Red Cloud Mine. The first example mentioned was 

 taken on July 21, 1920, the other two on July 13 of the same year ; all 

 three were males. 



Merriam Bat. Pipistrellus hesperus merriami (Dobson) 



Field characters. — Smallest bat in the Yosemite region (about three-fourths size of 

 Little California Bat). Total length 2 ¥2-2% inches (67-72 mm.), tail 114 inches 

 (29-30 mm.), hind foot about % inch (5 mm.), ear % inch (9 mm.), spread about 

 7% inches (197 mm.). Coloration warm buff above, paler beneath; flight membranes, 

 ears, lips, and muzzle black. (See pi. 21&.) 



Occurrence. — Common in Upper Sonoran and lower part of Transition zone on west 

 slope of Sierra Nevada. Eecorded from Pleasant Valley eastward to floor of Yosemite 

 Valley. Forages in the open, well above the smaller trees. 



