iv PREFACE. 
The Author has made portraits of nearly all British 
species, from which his observations are mainly drawn; and 
for examples of some of the rarer ones he tenders his best 
thanks to H. C. Watson, Esq.: he also confesses his obli- 
gations to the Council of the Royal Agricultural Society, 
for their permission to use the two drawings with which the 
book is now illustrated, as well as the matter which formed 
part of a series of papers to the Society’s Journal by 
THE AUTHOR. 
