PREFACE. 



In the Preface of the Tenth Vo- 

 hime, it was intimated that in 

 commencing a Second Series of 

 Ten vohnnes, it might he de- 

 sirable to modify the original 

 scheme of giving only one or two 

 genera in a volume, and to be 

 content with representing on each 

 Plate only insects of the same 

 genus, allowing a volume to con- 

 tain, if convenient, a greater 

 variety. 



I received from many quarters 

 assurances that such a change 

 woidd be most gladly welcomed. 

 Dr. Standi ngei wrote on the sub- 

 ject as follows : — 



" I quite agree with what you 

 " say in the Preface of Vol. X., 

 " and had indeed long thought 

 " of advising you to take that 

 " step. I even go farther, and 

 " am of opinion that it might 

 " sometimes be well to figure 

 " three genera on one Plate. 

 " Since there are many genera 

 " which only contain one, or at 

 " most two or three, species ; and 



PREFACE. 



Dans la Preface du dixieme vo- 

 lume j'avais indique qu'au com- 

 mencement d'une Nouvelle Serie 

 d'une Dizaine de volumes, il vau- 

 drait peut-etre mieux modifier le 

 plan original de ne donner qu'un 

 seul genre on deux genres dans 

 un volume, et se contenter seule- 

 ment a restreindre chaque Planche 

 a un seul genre, ce qui permettrait 

 a un volume de contenir une va- 

 riete de genres. 



J'ai re^u de plusiein's de nies 

 correspondants des assurances que 

 cette modification leur serait tres- 

 agreable, et M. le Docteur Stau- 

 dinger m'a ecrit a ce sujet comme 

 suit : — 



" Je suis tout-a-fait de votre 

 " a\'is, en ce que vous dites dans 

 " la Preface dn dixieme volume, 

 " et j'avais long-temps I'idee de 

 "vous donner ce conseil. Je le 

 " pousserais meme plus loin, et je 

 " dirais que selon mon idee il 

 " serait meme bon de figurer 

 " quelqucfois trois genres sur une 

 " seule Planche. Car il y a plu- 

 " sieiu's genres qui ne contiennent 



