Hovrll — Notes on Diurnal Migrations of Bats. 37 



field experience, and none of them has ever observed a similar 

 flight of bats, in which the southward migration was so clearly 

 evident. 



Dr. Edgar A. Mearns, however, in his list of mammals of the 

 Hudson Highlands* has recorded his observation of diurnal 

 flights of the Red Bat, but has given no details of the movement. 

 He says, ' ' I have never seen a Red Bat taken alive at that season 

 [winter] . It is possible that the species migrates to the south 

 in the autumn and returns in the spring. During the latter 

 part of October and the first week of November I have seen 

 great flights of them during the whole day. * * * One year 

 specimens are recorded on four days, on two days only males 

 and on two only females." 



Dr. Mearns tells me that in addition to these observations of 

 the Red Bat in New York, he has seen a diurnal flight of Hoary 

 Bats at Fort Snelling, Minnesota, but as his field notes are at 

 present inaccessible, details of the flight can not now be given. 



If diurnal migrations such as are recorded above are of regular 

 occurrence, it seems remarkable that they have not been more 

 frequently observed. Probably, however, such flights are the 

 exception rather than the rule. 



• Hull. Amer. Mus. Nat. Hist. X, 1898, p. 345. 



