CONTENTS. 



PAGE 



MEMOIR OF SWAMMERDAM ... 17 

 MEMOIR OF DE GEER . . . .59 



INTRODUCTION TO ENTOMOLOGY . . 67 



ANATOMY AND PHYSIOLOGY OF INSECTS . 125 



Nutrition . . ^ . . 126 



Digestion ... 127 



Respiratory System . . .155 



Tracheae or Air-tubes . . ,160 



Adipose tissue, and Secretions . . 164 



Nervous System .... 173 

 Reproductive or Generative System . 188 



Muscular System . . . .192 



Muscles of the Head . . . 194 



Muscles of the Thorax . . .195 



SYSTEMATIC ARRANGEMENT OF INSECTS . 199 



Order I. Coleoptera . . . 201 



Order II Orthoptera . . 206 



Fam. Forficulidae . . . .218 



Fam. Blattidse .... 221 

 Blatta(Bldberus)Gigantea. Plate VII. Fig. 1.225 

 B. Petiveriana. Plate VII. Fig. 2. . 226 



