PLAN OF THE WORK. ix 
very useful book. I have ventured to give names dif- 
ferent from his, to the greater divisions of the Moths, 
not that mine are unobjectionable, though they do not, 
I hope, involve the Hibernian discrepancy of including 
day-flying species under a night-flying division, as M. 
Latreille’s certainly do,—one of the beauties, I suppose 
of what is falsely called the natural system. 
The work of Mr, Curtis is also highly valuable, from 
the accuracy of the engravings and the novelty of the 
subjects, of which I have taken occasional advantage 
as I proceeded. 
In all cases when I either possessed specimens, or 
had access to them, I have not failed to compare the 
descriptions of authors with the insect itself, in order 
to arrive at as much accuracy as possible ; and though 
Iam far from thinking that I have fallen into no 
errors, 1 trust such as may be discovered will be found 
trivial in comparison with the utility at which I have 
aimed. I shall take it very kindly if lists of any such 
errors, or information connected with the subject of 
this, or my other projected volumes, be sent to me, 
free of expense, to the publisher's. 
In pursuance of my plan of publishing cheap and 
comprehensive pocket volumes like the present, Iam 
already considerably advanced with the ‘ Conspectus 
of Botany,” that of “ Birds,” and that of Two-winged 
