AN 



INTKODITCTION 



TO 



ENTOMOLOGY; 



OR, 



NATURAL HISTORY OF INSECTS: 



COMPRISING AN ACCOUNT OF 



NOXIOUS AND USEFUL INSECTS, 



OF THEIR METAMORPHOSES, FOOD, STRATAGEMS, HABITATIONS, SOCIETIES, 



MOTIONS, NOISES, HIBERNATION, INSTINCT, 



ETC. ETC. 



BY 



WILLIAM IRBY, M.A. F.R.S. F.L.S. 

 RECTOR OF BARHAM; 



AND 



WILLIAM SPENCE, ESQ., ;#',&& ; -F.L.& 



(FIFTH THOUSAND), 



WITH AN APPENDIX RELATIVE TO THE ORIGIN AND PROGRESS OF THE WORK. 



LONDON: 

 LONGMAN, BROWN, GREEN, LONGMANS, & ROBERTS. 



1857. 



