CONTENTS 



CHAP. PAGE 



Preface ........ v 



I. Introductory . 1 



II. The external structure of a flea . . . 21 



III. The mouth-parts and sense-organs . . 38 



IV. The internal organs of a flea ... 52 

 V. The Human flea and other species . . 62 



VI. The Chigoes and their allies ... 74 



VII. Fleas and Plague 83 



VIII. Rat-fleas and Bat-fleas .... 97 



Appendix A. Systematic riew of the order Siphon- 



aptera 108 



B. A list of British fleas and their hosts . 110 



C. On collecting and preserving fleas . 113 



D. Bibliography . . . .118 



Index 122 



