PREFACE. XV 



The author has experienced no small difficulty 

 in assigning Trivial Names to such species as ap- 

 peared to be non-descript : his aim has been so to 

 construct them, that they may point out some pro- 

 minent feature of the insect which they denote, or 

 allude to some remarkable circumstance in its eco- 

 nomy : but the species of this genus are so seldom 

 distinguished by singularity of form, or variety of 

 colouring, that he has often been at a loss to fix 

 upon an appropriate name; and he fears that many 

 will be thought not so happily illustrative of their 

 subject as he could wish. Where the same insect 

 has been described by several authors under differ- 

 ent Trivial Names, he has generally made it a rule 

 to retain that imposed by him who first noticed it. 

 Many of his non-descripts he has named after the 

 entomologists of this country, whether writers or 

 collectors only, distinguishing the former by the 

 termination ella, and the latter by ana, in conform- 

 ity to the practice of Linneus in the Tinece and 

 Tortrices. If he has omitted any gentleman who is 

 entitled to a place, he hopes it will be imputed to 

 ignorance rather than design. 



The author would be unpardonable, were he to 

 conclude this preface, without acknowledging his 

 obligations to those gentlemen, whose libraries and 

 cabinets he has been allowed the liberty of con- 

 sulting. 



' To Sir Joseph Banks, Bart, this, and every work, 

 in whatever department of Natural History, under- 



