Class I. MAMMALIA. 



Sub-class MONODELPHIA. 



Order CHIROPTERA. 



Sub-order MICROCHIROPTERA. 

 Family RHINOLOPHID^. 



1. Rhinolophus hipposideros {Bechst). Lesser Horse- 



shoe Bat. 



2. Rhinolophus ferrum-equinum {Schreb.). Greater Horse- 



shoe Bat. 



The occurrence of either of the Horse-shoe Bats in York- 

 shire has never yet been authenticated, although both have 

 been occasionally reported : such specimens as I have 

 been able to examine have proved to be of some other 

 and commoner species. 



Fam. VESPERTILIONID^. 



3. Synotus barbastellus {Schreb.). Barbastelle. 



4. Plecotus auritus (Z.). Long-eared Bat. 



Generally distributed, common. In some localities is more 

 numerous than the pipistrelle. 



5. Vesperugo serotinus {Schreb.). Serotine. 



6. Vesperugo discolor {Natterer). Particoloured Bat. 



7. Vesperugo noctula {Schreb.). Noctule. 



Widely distributed and not uncommon, becoming less 

 numerous in the north and west. Found at 700 feet 

 elevation at Carperby in Wensleydale. Its range in 

 Britain does not appear to extend further north than 

 Yorkshire. 



