124 PROCEEDINGS OF THE NATIONAL MUSEUM tol. no 



and at the base of the tail, and patches of cottony white hair at 

 the posterior base of each auricle; all hairs black at base, except 

 those at posterior bases of auricles. Underparts with hairs white 

 tipped, the white incompletely concealing the black bases. Membranes 

 pale grayish brown, auricles and tragi yellomsh brown. 



Measurements: See tables 7, 13. 



Remarks: USNM 269842, not reported previously, was captured 

 9 miles east of Roll, Yuma County, Ariz., on 5 August 1940, and was 

 submitted to the National Museum by Mrs. W. A. Jones, Box 3, Roll, 

 Ariz. It is an adult, probably a male, mummified, with the skull 

 still inside the skin. In Mrs. Jones' words, the details of its capture 

 were as follows: 



Dear Sirs. Am sending a bat of a kind I haven't seen before. . . . The 

 bat was captured the fifth of August, here at my home. It was a very hot day, 

 and the bat kept coming and lighting on the screened porch. My son [Weldon 

 Allen, Jr.], nine years old, caught it and brought it in the house. We gave it water. 

 It was very thirsty. It lived about three hours after catching it. . . . I wish 

 you could have seen the bat when it was alive. It was a pretty thing in an odd 

 way. 



Habitat: Euderma has seldom been collected or observed alive by a 

 mammalogist, despite the fact that it inhabits one of the most in- 

 tensively collected areas of the world. At least five of the records for 

 it can be attributed to small boys, and many of the other records stem 

 from persons neither scientists nor naturalists. Use of mist nets and 

 other trapping devices has failed to produce specimens. 



Euderma appears to be an inhabitant primarily of open or scrub 

 country. There is only one record of occurrence in a forest, in 

 Yosemite Valley, Calif. (Parker, 1952, p. 480); however, Vorhies 

 (1935, p. 225) quoted Herbert Brown as stating that Arizona Indians 

 assured him it was a forest dweller. Usually it has been found in or 

 on houses — in biological laboratory (Miller, 1903, p. 165; Hall, 1935, p. 

 148); in residence (Nicholson, 1950, p. 197); on porch (Hardy, 1941, p. 

 293; Mrs. W. A. Jones, 1940, in litt.; Benson, 1954, p. 117); under 

 eaves of house (Durrant, 1935, p. 226; Ashcraft, 1932, p. 162) ; clinging 

 to side of brush house (Vorhies, 1935, p. 225) ; in driveway near house 

 (Tucker, 1957, p. 406). Less frequently it has been observed in caves 

 or cave-like structures — in moist cave (Hardy, 1941, p. 293); in 

 springhouse dug into hillside (Parker, 1952, p. 481); in mine tunnel 

 (Vorhies, 1935, p. 225); in root cellar (Hall, 1946, p. 158). One that 

 was being attacked by yellow jackets when found perhaps had tried 

 to creep into a crevice or tree hole where these insects nested (Parker, 

 1952, p. 480). Several specimens have been in or near water — 

 floating in puddle, the overflow from a railway water tank (J. Grinnell, 

 1910, p. 317); floating in shallow reservoir (Benson, 1954, p. 117); 



