Freeman's Life of Kirby. 3551 



[These four letters were originally assigned to Mr. Spence, and 

 rough copies of them were prepared by him, extending to 120 

 pages of MS. in large 4to. ; but, owing to his ill health (as 

 explained in the advertisement to Vol. iii.), the accumulation 

 of new matter required the whole to be prepared for the press 

 by Mr. Kirby.] 



XXXIII. to XXXVI. — External anatomy of insects. Mr. 

 Kirby and Mr. Spence. 



[This department of the work, as has been previously here 

 explained, and in the advertisement to Vol. iii., was that to 

 which the authors, both during Mr. Spence' s visits to Barham 

 and in their long subsequent correspondence, mainly devoted 

 their attention ; and the tabular view of the parts of insects 

 was the very first portion of the work drawn up by them as the 

 result of their joint examination of a great number of insects 

 of all orders, and of long discussions (both orally and by let- 

 ter) as to their homological relations : but the more extended 

 and connected survey of the whole subject contained in these 

 letters was drawn up by Mr. Kirby.] 



Vol. IV. 

 " Letters. 



XXXVII. to XLIII. — Internal anatomy and physiology of in- 

 sects. Mr. Kirby and Mr. Spence. 



[The explanation given above as to the Letters on the states of 

 insects, applies equally to these seven Letters on their inter- 

 nal anatomy and physiology. They were originally assigned 

 to Mr. Spence, whose rough draughts of the letters fill 125 

 MS. 4to. pages ; but it was necessary, in consequence of his 

 ill health, that the whole should be prepared for the press by 

 Mr. Kirby, so as to incorporate the new facts with those which 

 Mr. Spence had collected.] 



XLIV. — Diseases of insects. Mr. Kirby. 



XLV. — Senses of insects. Mr. Kirby. 



XLVI. — Orismology, or explanation of terms. Mr. Kirby and 

 Mr. Spence. 



XLVII. — System of insects. Mr. Kirby. 



XLVIII. — History of entomology. Mr. Kirby and Mr. Spence. 



XLIX. — Geographical distribution of insects, &c. 



The first part, on general geographical distribution, by Mr. 

 Kirby ; the remainder by Mr. Kirby and Mr. Spence. 



