62 



BULLETIN 144, UNITED STATES NATIONAL MUSEUM 



ing from 4.6 to 5.2; lower tooth row (excluding incisors) usually less , 

 than 5.5 mm. (5.0 to 5.6 ram.). Foot slightly less enlarged than 

 in M. Itwifuffus, its ratio to tibia usually ranging from about 50 to 



Map 2. — Distribution of Myotis yumanensis : 1, M. yumanensis ydmanhnsis ; 

 2, M. yumanensis sociabilis ; 3, M. yumanensis satubatds ; 4, M. yumanensis 



LUTOSUS 



about 54. Skull with abruptly rising forehead. Fur of back dull 

 as compared with that of M. lueifugics, the longer hairs lacking con- 

 spicuous burnished tips. 



