474 Field Museum of Natural History — Zoology, Vol. XL 



remain with us during the breeding season is proved by the fact that 

 Hahn records a female with two young, having been taken in June in 

 southern Indiana (/. c, p. 638). The young are born late in May or 

 early in June and number from 2 to 4. 



The power of flight in Bats is illustrated by the occasional occur- 

 rence of this species in Bermuda.* To reach there they were forced to 

 make a continuous flight of nearly 600 miles from the nearest land. 



Specimens examined from Illinois and Wisconsin : 

 Illinois — Chicago, 3; (O.) Charleston, Coles Co., 1=4. 

 Wisconsin — Lake Geneva, Walworth Co., i; (M. P. M.) Janesville, 



Rock Co., 4; Milwaukee, 2 = 7. 



Map showing approximate range of the Hoary Bat (Nycleris cinereus) in eastern North America. 

 Its range includes practically the whole of North America from the Atlantic to the Pacific, south of 

 Hudson Bay and the Great Slave Lake region. 



* Jones, Mamm. of Bermuda. (Bull. U. S. Nat. Mus., 1884, p. 145.) 



