MAMMALIA: PIPISTRELLUS SUBFLAVUS. 17 



FAUNA. 



SPECIES OF MAYFIELD'S CAVE. 



MAMMALIA. 



Family VESPERTILIONIDAE. 

 Vespertilio fuscus (Beauvois). Brown Bat. 



One specimen was found March 17 in a narrow horizontal crack in the 

 wall. It is hard to see how it could have gotten into such a narrow place. 

 It would not be pushed out from behind, but when a pencil was held toward 

 it, it fastened hold of the pencil and was pulled out by its teeth. At 

 another time one was found on the roof out of reach and knocked down, 

 when it flew and escaped. December 9, 1904, I found one of this species 

 in a small, dome-like corner of the wall just past the first turn of the 

 cave. It appeared somewhat alert when the light was thrown upon it, 

 but I did not disturb it further. December 21 this bat was at the same 

 spot, but January 19 it had disappeared. January 28 one of these bats, 

 perhaps the individual just mentioned, was found a few feet farther in, 

 flattened out in a narrow crack in the roof. 



This species is probably more abundant than would appear, since 

 when found it has usually been in inconspicuous places. A number of 

 times, more often during spring and early summer, it was seen flying 

 about in the cave or back and forth past my light. It has also been 

 seen flying about in the cave in the spring after the other species have 

 disappeared. 



Myotis lucifugus (F. Cuvier). Little Brown Bat. 



Not common. One was taken March 17, 1904, and two in April, 

 1905, and two or three others were seen at different times. 



Pipistrellus subflavus (F. Cuvier). Georgian Bat. 



This bat is fairly abundant in the cave during early spring, late 

 fall, and winter. When fully established for the winter individuals 

 are to be seen in all parts of the cave. They return early, having been 

 found as early as September 24 (one) and September 29 (four or 

 five) , and remain until spring is well advanced. At first they return 

 in small numbers. By October 30 the number increases considerably. 

 Few come after this time, and probably none after November 20. They 

 seemed to have reached the maximum in numbers and to have been 

 pretty well distributed through the whole cave by November 20. 



