PRHF.U'E TO PART I. 



THIS work has been prepared to meet the demand for a text- 

 book which shall enable students to acquire a thorough knowledge 

 of the elementary principles of Entomology, and to classify in- 



keys similar t<> those used in Botany. 



is of the keys the -Indent can readily determine to wh.it 

 t of which he has . In many 



and the more common or 

 ich family have : -cribcd. 



lough much pains h.is In en taken to render easy tl: 



an effort has been made to give the mere d 



mination of the names of i- t very subordinate place. The 



groups of in K) that their relative 



affinities may 1 < d : and much space- has bc-en g 



accounts of the habits and transformations of the forn. 



tudents have been kej>t constantly 



in \ mic importance h.; 



cable, and particular attention 1 

 tiona of the methods of destroying those : 

 noxious, or of pi 



on of the techt :ns has been indicate<l by 



marking the ac time i; 



I not ci 

 c been drawn an .! 1>\ Mix Conistock. 



'iiat ha\ n of this 



all in tl: tomolo-ji , { \ Depart- 



