46 MAMMALS OF EASTERN MASSACHUSETTS 



Order Ghiroptera. 



Family Vespertilionidae. 



JLittle brown bat. Myotis lucifugus (LeConte). 



Common ; nocturnal, spending the days in caves or hol- 

 low trees. Length 3.40 inch. Color dark brown. 



Say's bat ; Little brown bat. Myotis subulatus (Say). 



Uncommon. Much like preceding except ears much 

 longer, and the knuckle bones of the hands come on a level 

 with each other across. 



Silver-haired bat. Lasionycteris noctivagans (LeConte). 



Probably occurs in the county. Length 4 in. Expanse 

 of wing 9 or 10 in. Fur very dark brown, with silvery- 

 white tips. Ears short and rounded. 



Northern Georgia bat ; Dusky bat. Pipistrellus 

 subflavus obscurus Miller. 



To be looked for. Probably occurs. Length 3.40 in. 

 Fur light yellowish brown, mottled with dusky, below 

 uniform yellowish-brown. Has been recorded from the 

 State at Concord, Mass. 



Large brown bat; House bat. Eptesicus fuscus 

 (Beauvois), 



Nocturnal. Spends day in buildings, caves, or on trees. 

 Winters in New England, common in the county. It is 

 about the last to make its appearance in the evening, and 

 does not usually come out until it is too dark to identify- 

 Distinguished from other brown bats by its large size* 

 Length 4.60 in. Expanse of wings 12 in. 



