106 ° J. B, CLELAND. 
fasciatus, whilst there were a few C. canis or felis. Only 
30 fleas from Mus musculus were identified, amongst which 
C. muscult were nearly twice as common as L. cheopis, the 
remaining few fleas being C. fasciatus. Six fleas, found in 
mice from Temora, in November, 1917, were all C. muscult. 
Table VI.—Showing the Total Number of Fleas taken from each 
Species of Lodent in Sydney from 1911 to 1917, 
Species of Rat. | L. cheopis | C. musculi| C. fasciatus wade P. irritans| Total 
ep Neel 8 
BE. rattus 1,530 | 1,209 | 457 24 1. | 3,094 
E.norvegicus| 1,161 688 274 14 5 2,137 
M. musculus 9 17 4 Ws a 30 
Total ..| 2,700'| 1,914 | 735 | 38/0 | 0 QIEPaHaes 
Besides one of these species of fleas (LZ. cheopis) acting 
as a nursery for the plague bacillus, this and other species 
are also true intermediate hosts for other parasites of rats. 
Thus Ceratophyllus fasciatus transmits Trypanosoma lewis 
from one rat to another, and Harvey Johnston’ has record- 
ed the finding of the Cysticercoids of the tapeworms Hymen- 
olepis dinunuta and H. murina in Sydney in both Lemop- 
sylla cheopis and Ceratophyllus fasciatus, and in a Mel- 
bourne specimen of C. fasciatus the Cysticereoid of H. 
diminuta. He has also recorded (p. 81) the presence of 
larval nematodes, Agamonema sp., in L. cheopis and once 
in C. fasciatus in Sydney. He considers the larva in all 
probability to be the young of a pre sensu lato, and 
suggests especially S. obtusa. 
FLEAS CAUGHT ON HuMAN Bernes.—It may be of interest 
to mention here the species of fleas that I have found in- 
festing man in Australia. In Sydney and at Narrabeen, 
out of 19 fleas caught at varying times, 18 were Pulex irri- 
tans and 1 Ctenocephalus canis. A batch of 27 fleas from 
< Johnston, Proc. Roy. Soc., Queensl., June, 1912, p. 69. 
