193G] 



MAMMALS OF OREGON 



369 



FIGURE 91. Range in Oregon of: 1, Myotis lucifugus 

 alaacenats; 2, M. 1. carissima. 



widely migratory or specimens would be taken outside of its breed- 

 ing range. 



General habits. At McKenzie Bridge specimens were secured in 

 the evening twilight as they flew rapidly across the open spaces in 

 the forest, catching their insect prey on the wing among or near the 

 treetops. They also flew 

 about the houses in the 

 settlement but seemed 

 more a part of the forest 

 life and apparently came 

 from among the trees. 

 Still, there were rocks and 

 cliffs not far away, and 

 old cabins in the forest 

 may have afforded shelter 

 during the day. Near 

 Bend L. J. Goldman shot 

 them around his camp fire 

 in the evening and saw 

 the m catching insects 



nrnnnrl thp a rr lights in 

 wlOUna me arc llgntS in 



town. 



In general their habits are very similar to those of their near 

 relative, the Yellowstone bat, a more widely distributed and better- 

 known form. 



MYOTIS LUCIFUGUS CARISSIMA THOMAS 

 YELLOWSTONE BAT; PEJAHANA of the Piute at Burns 



Myotis (Leiwonoe) cansima Thomas, Ann. and Mag. Nat. Hist. (7) 13: 383, 

 1904. 



Type. Collected at Yellowstone Lake, Yellowstone Park, Wyo., by J. ffolliott 

 Darling, September 1903. 



General characters. Slightly larger and paler in coloration than typical 

 Myotis lucifitffus, with paler membranes and often with whitish margins of the 

 posterior edge of tail membranes ; upper parts glossy pale cinnamon buff or light 

 brown ; lower parts with silvery whitish wash over dusky underfur ; ears, feet, 

 and membranes sooty or blackish, the posterior edges of tail and part of wing 

 membranes generally pale or whitish. Immature specimens often more sooty 

 and less glossy. 



Measurements. Adult female from Malheur Lake : Total length, 85 mm ; tail, 

 35; hind foot, 10.5; ear (in flesh), 14, (dry), 12. Weight (fat and with full 

 stomach) 9.8 g. Another female from the same place: 85; 31; 10; 14. Weight 

 D.75 g. Spread of wings, about 260 mm. 



Distribution and habitat. Rocky Mountain and Great Basin region 

 from southeastern Montana, Wyoming, Colorado, Utah, Nevada, and 

 west to the Cascades and Sierra Nevada Mountains. Oregon speci- 

 mens referred to this form are from Riverside, Watson, Sheaville, 

 Malheur Lake, Voltage, The Narrows, Steens Mountains, Crooked 

 River, East Pine Creek, Paulina Lake, and Klamath Falls (fig. 91). 



These rather small, pale brown bats are generally common over 

 the open sagebrush country of eastern Oregon, and in many places 

 are the most abundant species seen during the early dusk of evening 

 flying around the ranch houses and barns, or along the streams and 

 canyon walls, in both Upper Sonoran and Transition Zones. 



7209' 



