MARCH, 1908 
No. 1 
6 - JUH. 1908 
Volume I 
REVISION OF THE NON-COMBED EYED 
SIPHONAPTERA. 
By KARL JORDAN, Ph.D., and 
The Hon. N. C. ROTHSCHILD, M.A., F.L.S. 
CONTENTS. 
Introduction . 
PAGE 
1 
Synopsis of genera ........ 
4 
1. 
Genus : Pulex ....... 
5 
2. 
Genus : Pariodontis ...... 
13 
3. 
Genus : Moeopsylla ...... 
15 
4. 
Genus : Loemopsylla ...... 
15 
5. 
Genus : Rhopalopsyllus ..... 
66 
6. 
Genus : Parapsyllus ...... 
84 
7. 
Genus : Coptopsylla ...... 
91 
8. 
Genus : Goniopsyllus ...... 
92 
9. 
Genus : Lycopsylla ...... 
93 
Introduction. 
The importance of certain species of fleas in relation to the 
epidemiology of plague has been so amply demonstrated (see Journal of 
Hygiene, vols. VI. 1906, p. 426 and vn. 1907, p. 395) that an explanation 
appears scarcely necessary for our publishing a paper dealing with 
a revision of the non-pectinated eyed Siphonaptera. With the 
demonstration that fleas are capable of transmitting plague, their 
study at once ceased to be the mere hobby of .a small group of 
entomological specialists. An accurate knowledge of fleas, both with 
regard to their structure and biology, is at present a matter of prime 
importance to those who concern themselves with the prophylaxis of 
plague. 
The assumption seems justified that the species which is most 
abundant on rats in those portions of the world where plague is endemic 
will be the one which is most instrumental in spreading the disease. 
Parasitology i 1 
