1936] 



MAMMALS OF OREGON 



379 



FIGURE 



. Range of black-nosed bat, Myotis subula- 

 tus melanorhinus, in Oregon. 



Rome, Skull Spring, Twelve Mile Creek, and Warner Valley (fig. 

 96). There is one from Ely, Wash., in the extreme southeastern 

 corner, close to the Oregon line. 



These localities carry 

 the animal's range over 

 the arid part of eastern 

 Oregon and indicate a 

 rather abundant species 

 in mainly Upper Sonoran 

 Zone. They have been 

 collected from April 12 

 at the mouth of the De- 

 schutes to September 26 

 in Warner Valley. 



General habits. On the 

 wing these little bats are 

 indistinguishable from 

 Myotix calif omicm, and 

 even in the hand require 

 close scrutiny to detect the 

 dusky nose and face. In habits they seem to be equally close or else 

 to have been mistaken for calif omicus, as there are no field notes 

 attributed to them. 



EPTESICUS FUSCUS FUSCUS (PEALE and BEAUVOIS) 

 BIG BROWN BAT 



Vespertila fuscus Peale and Beauvois, Catal. Raisonne", Mus. Peale, Phila- 

 delphia, p. 18, 1796 (p. 14, English ed.) 



Type locality. Philadelphia, Pa. 



General characters Size large, expanse of wings about 13 inches; fur long 

 and glossy, color bright brown; membranes blackish, total number of teeth 

 32. Color of upper parts bright tan brown; lower parts slightly paler; mem- 

 branes, feet, ears, and nose black or blackish. 



Measurements. Spread of wings, 324 mm. Total length, 117; tail, 50; feet, 

 11 ; forearm, 44. Weight 12-15 g when not excessively fat. Weight of five 

 males 14.6-22.7 g (Grinnell, Dixoii, and Linsdale, 1930, p. 456). 



Distribution and habitat. These large brown bats range clear 

 across the northern United States and are more or less common 

 over practically all of Oregon at one season or another (fig. 97). 

 Their breeding range seems to be mainly in the Transition Zone, 

 but in late summer they are found in the Canadian Zone timber 

 of the mountains and in spring or late summer may be found in the 

 lowest valleys. Not until the bats have been banded and more 

 carefully studied in the field at all seasons will it be possible to 

 speak intelligently of their ranges and migratory habits. 



General habits. These are rather conspicuous strong flying bats, 

 coming out early in the twilight, and after visiting the nearest 

 water for a series of copious drinks begin the quest for flying in- 

 sects among the trees, along streams, or about buildings or rocks. 

 Their flight is rapid but not so quick and crooked as that of the 

 smaller species and generally more specimens are secured than of 

 many smaller kinds that are just as numerous. 



