Order Chiroptera. Bats. 



Family Vespertilionidae. Common Bats. 

 Subfamily Vespertilioninae. 

 Genus Myotis. (155). 



Myotis grisescens Howell. 



Myotis grisescens Howell, Proc. Biol. Soc. Wash., XXII, 1909, 

 p. 46. 



Type locality. Nickajack Cave, near Shellmound, Marion County, 

 Tennessee. 



Geogr. Distr. Indiana, Tennessee, and Missouri. 



Gent. Char. Nearest M. velifer, but darker; wings attached to the 

 feet near ankle joint. 



Color. Upperparts from dark mouse-gray to dark hair-brown; 

 underparts, hairs at tips pale smoky gray, mouse-gray basally; flanks 

 and lower part of abdomen whitish; membrane, ears and feet black. 

 Ex type in United States National Museum. 



Measurements. Skull: Occipito-nasal length, 14.1; Hensel, n.8; 

 zygomatic width, n; intertemporal width, 4.2; length of upper molar 

 series, 3.9; length of mandible, 11.3; length of lower molar series, 5.9. 

 Ex type in United States National Museum. 



Myotis carissima Thomas. 



Myotis carissima Thos., Ann. and Mag. Nat. Hist., Ser. 7, XIII r 



1904, P- 383- 

 Type locality. Yellowstone Lake, Yellowstone Park, Wyoming. 



Myotis baileyi Hollister. 



Myotis baileyi Hollister, Proc. Biol. Soc. Wash., XXII, 1909, p. 44. 



Type locality. Base of White Mountains, near Ruidoso, Lincoln 

 County, New Mexico. 



Genl. Char. Like M. velifer but smaller; tragus broad, pointed; 

 wing from base of toes; forearm shorter. 



Color. Upperparts sepia; underparts smoke-gray; ears, face 

 and wings black. Ex type in United States National Museum. 



Measurements. Total length, 72.6; tail, 27.8; foot (skin), 9.1: 

 forearm, 40.3; ear, 14.9; tragus, 6.5; thumb, 6.4. Skull: Total 



154 



