CONTENTS. 



I'ape 

 LETTER I. 



Introdiictort ....... 1 10 



LETTER IL 



Objections answered ---...] j 30 



That Entomology is a trifling pursuit - - - - 1 1 



That Entomologists confine themselves chiefly to nomenclature 20 



That it leads to cruelty - - - - . - 27 



LETTER IIL 



Metamorphoses of Insects - - . . _ 31 41 



States of Insects {egg, larva, &c.) - - . . - 33 



(Orders of Insects) - - . - - . - 34 



Theory of Metamorphoses - - - - . - 36 



Object of Metamorphoses - - - - - - 40 



LETTER IV. 



Direct Injuries caused by Insects (Afeecting Man Personally) 42 77 



1. Insects which make man their food - . • . 43 53 



Pediculus humanus, &c. - - . - - - 43 



Acari - - . . . . . -46 



Larva - - - - - - - -51 



Fleas - - - . - - - -52 



Chigoes - - - - - - -53 



Harvest bugs, Ticks, &c. - - - . - 54 



Bed Bugs, &c. - - - - - -55 



Insects giving an electrical shock - - - -56 



Horse Flies, &c. - - - - - -57 



Mosquitoes, &c. - - - - . . - 58 



2. Imects ivhich attach man from revenge or fen:r » - QZ — 67 



Bees, Wasps, &c. - - - , . - 63 

 a 2 



