156 MYOTIS. 



Hensel, 10.5; zygomatic width, 8.5; interorbital width, 4.1; width of 

 braincase, 8; length of upper tooth row, ex canine, 3.8; length of 

 mandible, 15; length of lower tooth row, ex canine, 5.1. Ex type in 

 United States National Museum. 



This form differs from M . lucifugus mainly in the skull which is 

 larger and the braincase flattened. 



Myotis capitaneus Nelson and Goldman. 



My otis capitaneus Nels. and Goldm., Proc. Biol. Soc. Wash., 

 XXII, 1909, p. 28. 



Type locality. San Jorge, 30 miles southwest of Comondu, Lower 

 California, Mexico. 



Genl. Char. Resembles M. californicus, but larger with shorter 

 and more rounded ears; tragus shorter, no notch above lobe at pos- 

 terior base. 



Color. Upperparts brownish cinnamon; head paler; underparts 

 pale ochraceous-buff with a brownish tinge; membranes brown. Ex 

 type in United States National Museum. 



Measurements. Total length, 92; tail, 42; forearm, 33.6; tibia 

 18.9; foot, 7.4; thumb, 5.8. Skull: Occipito-nasal length, n, 

 Hensel, 9.7; zygomatic width, 7.9; intertemporal width, 3.8; length 

 of upper molar series, 3.9; length of mandible, 7.8; length of lower 

 molar series, 4.6. Ex type in United States National Museum. 



Myotis micronyx Nelson and Goldman. 



Myotis micronyx Nels. and Goldm., Proc. Biol. Soc. Wash., 

 XXII, 1909, p. 28. 



Type locality. Comondu, Lower California, Mexico. 



Genl. Char. Like M. evotus but smaller. 



Color. Upperparts and middle of face light golden-cinnamon; 

 sides of face covered with dusky hairs; underparts gray with a buff 

 tinge; ears, feet and membranes black. Ex type in United States 

 National Museum. 



Measurements. Total length, 90; tail, 42; forearm, 35.8; tibia, 

 18.2; foot, 7.9; thumb, 5.7; ear, 14.6. Skull: Occipito-nasal length, 

 4.4; Hensel, 11.4; zygomatic width, 14.3; width of braincase, 7.2; 

 intertemporal width, 3.8; palatal length, 7.3; length of upper molar 

 series, 4.1; length of mandible, 11.2; length of lower molar series, 6. 

 Ex type in United States National Museum. 



Myotis winnemana Nelson. 



Myotis winnemana Nelson, Proc. Biol. Soc. Wash., XXVI, 1913, 



p. 183. 

 Type locality. Plummers Island, Maryland. 



