10 
Observations on British Rat-fleas 
cent, came from outhouses, etc., and 32 per cent, from the fields; this is 
in striking contrast to the other species, 39 per cent, of which came 
from the buildings and 61 per cent, from the hedgerows. These figures 
possess a certain practical importance which will be discussed later. 
We found C. fasciatus on the following hosts; 
Host 
No. of No. of 
occasions individuals 
Man 3 4 
Stoat 1 1 
Mouse 1 2 
Ferret 4 121 
Ivabbit 3 4 
July Aug. Sept. Oct. 1911 Nov.—Dec. 1910 
(Stricklaml and Merriman) (Martin and Kowland) 
Chart III. 
