VIU CONTENTS. 



CHAPTER IV. 

 MUTUALISTS. 



PAGE 



Definition — Ricinidse — Trichodectes of Dog harbouring Larva of 

 Taenia — Arguli — Caliguli — Ancei — Pranizse— Cyami — Nematode 

 Mutnalists— Strange form of Histriobdellse — Egyptian Distome 

 in Jjxan ••• ••• ••• ••• ••» ••• ••• ••• ^" 



CHAPTER y. 



PAEASITES. 



Distinction between Parasites and Carnivora— Parasites found on all 

 Classes of Animals — Males dependent on Females— Parasites on 

 Man — Abundant Parasites in Stork — All the Organs nourish 

 Parasites — Different size of Male and Female — Lerneans — 

 Diplozoa — Migration of Parasites — Corresponding Changes of 

 Form — Parasites restricted to certain Kegions— Former Theory 

 of Spontaneous Generation ... ... ... ... ... ••• 85 



CHAPTER VI. 

 ^ PARASITES FREE DURING THEIR WHOLE LIFE. 



I.eeches Vampires — Cylicobdellse — Branch ellions — Gnats — Black- 

 flies— Mosquitoes— Gnats in high Latitudes— Tsetse— Ox-flies— 

 Pteropti—Nycteribise— Bugs— Lice— Fleas— Itch Insect— Acari 

 on Beetles and Bees— Cheyletus eruditus 107 



CHAPTER VII. 



PARASITES FREE WHILE YOUNG. 



Isopod Parasites — Chigoe— Ticks— Pigeon-mite— BopyridsB—Ich- 

 thoxenus — Peltogasters — Tracheliastes — Penellse — Lerneans — 

 Guinea-worm — Leptodera of Snail — Nematodes in Bones — 

 Lichnophoraj — Gregarinse ... ... ... ••• 138 



CHAPTER VIII. 

 PARASITES THAT ARE FREE WHEN OLD. 



Utility of Ichneumons— Scolise of Tan-beetles— Scolyti of Seychelles 

 Cocoa-nut Trees— Elms at Brussels destroyed by Scolyti 



