143 



7. Pipist rcll IIS snhfhi Ills (F. Ciivier) . (U'orginii liat. 



Partial skulls and niaiKlil)les ivpresonting eijilit iiidivuluals of this 

 species were foiu)d at various points in or near the "big room." 



8. Lasiiinis- ciiictciis (IJeauvois). Hoary l)at. 



This species is widely distributed, but everywhere rare. The find- 

 ing of two partial skulls and skeletons adds this locality to the 

 two previously recorded for Indiana. 



9. La.siiinis boiealis (Miiller). Ked bat. 



Remains of this species were far more abundant than of any other. 

 More or less complete skulls and skeletons of 203 individuals 

 were found. The abundance of the species will be discussed 

 later. 



10. Myoiis subuhitus jSay). Say bat. 



One skull can be uiiqnostionably referi'ed to this species. 



11. Myotis Iiicifiif/iis (Le Conte). Little brown bat. 



Nine skulls could be positively referred to this species. Eight 

 others were probably M. liicifiigiis. but were too badly broken 

 to determine with certainty whether they belonged to this or 

 to the last preceding species. 

 It will be noted that the above list contains a large number (203) of 

 specimens of the red bat and but few (17) of the little brown bat. If we 

 turn to the living rej^resentatives of the two species this abundance is ex- 

 actly reversed. Mr. W. S. Blatchley informs me that the proportion of the 

 two species in Wyandotte' Cave is about 1 to 1,000, the larger number being 

 the brown. Mr. A. M. Banta, who has had a very extensive acquaintance 

 wath the cave fauna of Monroe and Lawrence counties, is of the opinion that 

 the red bat never enters oaves at all. and that, though common above 

 ground, it is less abiuidant than the brown species. My own observations 

 are in complete accord w'ith those of Mr. Banta. 



The period at which this change in relative abundance has taken place 

 can not be determined accurately from the evidence now at hand. Evident- 

 ly it has been within re<:-ent geological times, since many of the bones were 

 found in places where they would have been destroyed by changes which 

 must have taken place during some recent epoch. On the other hand 

 many of them were found partially covered with fragments of stone which 

 have gradually weathered away from the larger masses, and this would 

 seem to indicate that at least a part of the bones are many years, possibly 



