iv ADVERTISEMENT. 



prising* if some errors should have crept in; espe- 

 cially as Mr. Kirby 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 (Vol. III. p. 354—393, and Vol. IV. 

 p. 257 — 354), 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. Kirby'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- 



