iv ADVERTISEMENT. 
prising if some errors should have crept in; espe- 
cially as Mr. Krrpy was deprived of the effectual 
help formerly derived from the acumen, learning, 
and judgement of his esteemed coadjutor, by his 
lamented and protracted indisposition: but it is 
hoped that these errors will be found of minor 
importance, and not to affect any general prin- | 
ciples advanced. The same remarks are also in 
part applicable to the Anatomical and Orismolo- 
gical Tables (Vot. III. p.3853—392, and Vor. IV. 
p. 266—363), which were drawn up by the Au- 
thors jointly many years ago, before any other 
portion of the work was composed, but which 
have, especially the former, required considerable 
alterations and additions in consequence of sub- 
sequent observations and information. 
It will not be amiss here to state, in order to 
obviate any charge of inconsistency in the pos- 
sible event of Mr. Kirsy’s adverting in any other 
work to this subject, that though on every material 
point the authors have agreed in opinion, their 
views of the theory of instinct do not precisely 
accord. That given in the second and fourth 
volumes is from the pen of Mr. Spence. 
It was originally intended, as mentioned in the 
Preface, to have given a complete list of Entomo- 
’ 5 
