CONTENTS. Ill 



PAGE 



Their insertion and connexion 38 



Their direction . . .16. 



Their length and proportion . . 39 



Their form . . . ib. 



Ears in male and in female insects . . ib. 



The Eyes. 



Structure of simple eyes . . 40 



Structure of compound eyes . . 41 



Singularity in night insects . . ib. 



The Mouth. 



Number of parts and law of proportion . 42 



Wild theory of Lamarck . . . ib. 



Reverse views of Savigny . . ib. 



Mistakes of English naturalists . . ib. 

 Insects' mouths imperfect and " totally useless " 43 



The upper lip . . ib. 



The upper jaws . . ib. 

 The under jaws, with their feelers, outer and inner ib. 

 The under lip, chin, feelers, and tonguelet . 44 



Mouth in bees and in butterflies . .45 

 Mouth in two winged flies, gnats, and bugs . 46 

 MEMBERS OF THE CORSELET. 



Legs and wings . . . .47 



Law of proportion . . . ib. 



The Legs in Insects. 



Exactly six in number . . ib. 



Jointings of each pair . . . ib. 



Pieces of the leg, four in number . . 48 



The haunch ... . ib. 



The thigh . . . ib. 



The shank . ... ib f 



The foot . . ib. 

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