Two Species of Plecotus. 75 



first species, the language of Major Le Conte, from whose 

 notes I have also copied the dental formula. 



Yespertilio megalotis, Raf., Plecotus Rajincsquii, Lesson, 

 which is described as having the auricle as long as the ears, 

 cannot be either of our species. I am not acquainted with 

 any other species within the United States. 



