igo THK SIPHONAPTERA OF NORTHUMBERLAND AND DURHAM 



Genus ISCHNOPSYLLUS Westw. 



Ischnopsyllus octactenus Kolen. (1856). 



On a pipistrelle bat {Pipistrellus pipistrellus), taken by 

 Mr. Walton Lee at Corbridge-on-Tyne. 



"A common species,- recorded from England, Scotland 

 and Ireland. The usual liost is the pipistrelle, but it also occurs 

 on the whiskered bat, Daubenton's bat and the hairy-armed 

 bat." 



Ischnopsyllus simplex Roths. 



On a whiskered bat {Myotis mystacimis) taken by Mr. 

 George Bolam in Hexhamshire, 19 16. 



In a letter dated September 25th, 1916, Mr, Rothschild 

 says: — "The four fleas you were good enough to send me 

 from the whiskered bat are /. shnplex, the species generally 

 found on Natterer's bat. This is very interesting as it is a 

 new host." 



"A rare species, unrecorded from Scotland and Ireland. 

 Has been found in several localities in England and Wales, 

 always on Natterer's bat {^Myotis nattereri), apparently its only 

 host." 



