0 



CONTENTS 



THE FIRST VOLUME. 



Page 



LETTER I. 



Introductory - 1 — 16 

 LETTER IL 



Objections answered _ _ - I7 — 46 



That Entomology is a trifling pursuit - - - 1 7 

 That Entomologists confine themselves chiefly to nomenclature - 32 



That it leads to cruelty - - - - 42 



LETTER III. 



Metamorphoses of Insects - - - 47 — 



States of Insects (egg, larva, &c.) - - - 50 



(Orders of Insects) - - - - 52 



Theory of Metamorphoses - - - -53 



Object of Metamorphoses - - - - 60 



LETTER IV. 



Direct Injuries caused by Insects (affecting Man per- 

 sonally) - - - - 63 — 115 

 1, Insects which make man their food - - 65 — 95 

 Pediculus humanus, 8zc. - - - 65 

 Acari - - - - - 69 

 Larvce - - - - ~ 76 

 Fleas - - - - - 78 

 Chigoes - - • - - 79 

 Harvest Bugs, Ticks, &c. - - - 81 

 Bed Bugs, &c. - - - -83 

 (Insects giving an electrical shock) - - 84 

 Horse Flies, &c. - - - - 86 

 Mosquitoes, &c. - - - - 88 

 a 2 



