CONTENTS. 



LETTER I. 

 INTRODUCTORY - - - - - - - 1 10 



LETTER II. 



OBJECTIONS ANSWERED ----- ] i 30 



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



That Entomologists confine themselves chiefly to nomenclature 20 



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



LETTER III. 



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 (AFFECTING MAN PERSONALLY) 42 77 



4363 



- 43 



- 46 



- 51 

 52 



1. Insects which make man their food 

 Pediculus humanus, &c. - 

 Acari - 



Larvee - - - 



Fleas - 



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. Insects which attack man from revenge or fear - - 63 67 



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



a 2 



