372 NORTH AMERICAN FAUNA [No. 55 



bers at the top of a large wooden bridge. The breeding females 

 arrived in April. A few young were born as early as June 1, and a 

 few females still contained foetuses as late as July 7. In every case 

 there was but 1 young or 1 embryo to a female, and some of the bats 

 shot for specimens had small ^oung clinging to them. In 1910 all 

 of the bats had deserted the bridge by September 2, nearly 2 weeks 

 earlier than on the previous year. 



MYOTIS YUMANENSIS SATURATUS MILLER 

 DUSKY BAT 



Myotis yumanensis satiiratus Miller, North Amer. Fauna No. 13, p. 68, 1897. 



Type. Collected at Hamilton, Skagit County, Wash., by T. S, Palmer, Sep- 

 tember 13, 1889. 



General characters. Size small, color dark ; upper parts dull sepia ; lower 

 parts buffy on belly, washed on throat and sides with sepia ; ears and mem- 

 branes dark brown or blackish. Young of the year duller and more dusky than 

 adults. 



Measurements. Adult male from McKenzie Bridge: Total length, 85 mm; 

 tail, 38 ; foot, 10 ; ear (dry) , 11. Adult female from same place : 83 ; 35 ; 10 ; 12. 



Distribution and habitat. The humid coastal slope west of the 

 Cascades from southern British Columbia to northwestern California 

 and down the coast to San Luis Obispo County. In Oregon speci- 

 mens have been taken at the Columbia River, Wilson River, Hope, 

 Mohler, Blaine, Netarts, Mercer, Wedderburn, Roseburg, McKenzie 

 Bridge, and Vida (fig. 92). Apparently this is one of the commoner 

 small bats in the Transition forest area west of the Cascades. It is 

 resident throughout the summer, specimens having been collected at 

 various dates from June 24 to October 24, but where they spend the 

 winters no one seems to know. At Blaine, Tillamook County, 

 Alex Walker has collected specimens from July 19 to September 28. 



General habits. At Vida, on the upper McKenzie River, the 

 writer secured one of these little bats on June 24, but found them so 

 quick and erratic in flight that in the deep shadows of the forest no 

 more specimens could be brought down. At Wedderburn near the 

 mouth of Rogue River, on October 24, they were found flying in and 

 out of an old barn rather early in the evening, and one was shot in 

 the early twilight before it had secured a meal of insects. Its 

 stomach was found to be quite empty, a rare condition with bats shot 

 on the wing, as they quickly acquire a full stomach. 



Breeding habits. Apparently there is nothing on record regard- 

 ing the breeding habits of this common and wide-ranging form, a 

 sad reflection on the state of knowledge of a highly useful mammal. 



Food habits. Most or all of the food is taken on the wing and 

 consists of flying insects found among the trees or around buildings, 

 but not easily identifiable as to species. Probably many or most of 

 these are injurious species. 



MYOTIS EVOTIS EVOTIS (H. AIXEN) 

 LITTLE BIG-EARED BAT 



Vespertilio evotis H. Allen, Monograph Bats of North America, Smithsn. Misc. 

 Collect., no. 165, p. 48, 1864. 



Type locality. Puget Sound; no type specimen. 



General Characters. Size slightly larger than that of Myotis yumanensis or 

 lucijugus, and ears very much larger, longer, and wider. Color yellowish 



