AMERICAN BATS OF THE GENERA MYOTIS AND PIZONYX 87 



Ears. — The ears are moderately long, reaching, when laid forward, 

 to the nostril or slightly beyond it; tragus slender, about one-half 

 the height of the ear, its anterior edge nearly straight, broadest at 

 base, narrowing in the terminal half to a bluntly rounded tip, and 

 provided with small lobule at its base posteriorly. 



Map 4. — Distribution of Myotis velifer : 1, M. velifer velifer ; 2, M. vehfee 

 iNCAUXus ; 3, M. velifer peninsdlakis 



Wing (md membranes. — ^Wing membrane arising from base of toes. 

 Third and fourth metacarpals usually subequal, the fifth decidedly 

 shorter; when folded the third metacarpal reaches to within 2.5 

 to 3 mm. of the elbow. Taking the third finger as 100, the fourth 

 is 86, the fifth 80 (72 : 62 : 57.5 mm.) . Tail involved in the membrane 

 except for the minute terminal and half the penultimate vertebrae 



