C. Strickland and U. Merriman 
0 
TABLE II. 
Giving the aven 
Rat Plague: 
Present ( + ) 
Absent (-) 
4-1 
+ 
4-2 
- 
3-7 
+ 
3-5 
3-4 
- 
3-1 
- 
2-5 
+ 
2-4 
-f 
2-4 
_ 
2-4 
- 
2-1 
- 
2-0 
- 
1-9 
- 
1-8 
1-6 
- 
1-5 
+ 
1-3 
- 
1-0 
- 
0-3 
_ 
0-2 
- 
each district. 
District 
Sutton. 
Great Horksley, Boxted, Langham, Dedham, Ardleigh, 
Lawford. 
Alderton, Bawdsey. 
Belstead, Wherstead, Tattingstoue, Brantham. 
Naoton, Levington, Stratton Hall. 
Kesgrave, Martlesham, Bright well. 
Foxhall, Purdis Farm, Bucklesham, Newbourne. 
Freston, Woolverstone, Holbrook, Chelmondiston, Hark- 
stead, Shotley. 
Eushmere. 
Playford. 
Holton, Capel, Great and Little Wenham, Chattisham, 
Hintlesham, Sproughton, Burstall, Bramford. 
Earl-Soham,Framlingham, Easton, Parham, Gt Glenham,' 
Swelling, Eendham. 
Claydon, Akenham, Whitton, Witnesham, Swilland, 
Citlpho, Tuddenham, Westertield. 
Washbrook, Bentley, Great Bergholt. 
Hasketon, Melton, Ufford. 
Ipswich. 
Shottisham, Hollesley, Boy ton. 
Walton, Felixstowe. 
Boulge, Bredfield. 
Boxford, Assington. 
The seasonal variation of G. fasciatus is indicated in Chart I for 
eight-weekly periods. It dropped from 2‘58 per rat to 2T5 as the tem¬ 
perature and humidity fell. Chart III shows the variation per calendar 
month. There was a me in the average number per rat during 
September, although the temperature showed a decrease. About 200 
rats per month were examined, so that the average given was probably 
a real one. 
Apparently G. fasciatus is the most prevalent flea occurring on lats 
in outhouses, etc., about human habitations, for of those Heas taken 
from rats caught in these situations 72 per cent, belonged to this 
species. Yet it appears to hold its own in the country-side, for of the 
fleas taken from hedgerows, etc., 48 per cent, were of this species. We 
obtained altogether 1986 specimens of G. fasciatus, of which 08 per 
