MAMMALS 259 



Ci Upper premolars 3 (on each side) (Fig. 149) i. Myotis. 



Co Upper premolars 2. 



di Lower premolars 3 2. Lasionycleris. 



d2 Lower premolars 2 3. Pipistrellns. 



Cs Upper premolars i 4- Eptesicus. 



bo Upper incisors 2 (both sides). 



Ci Upper premolars 2 (on each side) S- Nyctcris. 



Co Upper premolars i. 



di Mandibular tooth-row more than 8 mm. long 6. Dasypterus. 



do INIandibular tooth-row less than 7 mm. long 7. Nycticeius. 



ao Ears very large and united at base in front. 



bi Nostrils simple 8. Euderma. 



b2 Nostrils with a high ridge behind each 9. Corynorhinus. 



I. Myotis Kaup. Small, slender bats with a long tail, a hairy face 

 and narrow ears; dentition 2/^, i/i, ^/z, 2,/c)' 8° species, cosmopolitan; 

 about 30 species and subspecies in the bvT\~-<K 



United States and Canada. A ^ W^X^^^K^ 



M . lucifugus (LeConte) . Little brown ^ 



bat (Fig. 149). Body brown in color; g 

 length 87 mm.; tail ^8 mm.; fore arm ^8 ^ ^ ^ , ^^ ■ , ■ 



° ' ' " ' Fig. 149. — Teeth of Myotis luct- 



mm.; ears short and broad and when laid fugus: a, left side of upper jaw; b, 



c J i^UiiiU i. •^ left side of lower jaw {from Miller). 



foreward reach about to the nostrils: 



entire United States, except the coastal regions of the Pacitic slope 



north of Puget Sound; common, especially towards the south. 



Subspecies of M. lucifugus 



M. I. lucifugus (LeC). Entire country, except the Rocky Moun- 

 tains and the Pacific coast. 



M. I. altipetens (Grinnell). Color yellowish; size smaller: the 

 central Sierras near Mount Shasta. 



M. longicrus (True). Upper parts bister; under parts buff; length 

 100 mm.; tail 45 mm.: Pacific Slope; Boreal and Transition Zones. 



Subspecies of M. longicrus 



M. I. longicrus (True). Body larger: Puget Sound region and east- 

 ward to Wyoming and southward to Arizona and southern California. 



M. I. interior Miller. Color tawny olive : Idaho and Wyoming south 

 into Arizona and New Mexico. 



M. subulatus (Say). Color light brown; length 85 mm.; tail 38 

 mm.; fore arm 35 mm.; ears slender and when laid forward reaching 

 considerably beyond tip of nose: North America, east of the Rockies; 

 common; number of young at a birth 2. 



