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XVII. The Natural History, Anatomy, and Development of' Meloé (continued). 
By Grorce Newport, Esq., F.R.S., F.L.S. Sc. &c. 
SEcoND MEMOIR. 
The History and General Anatomy of Meloé, and its Affinities, compared 
with those of the Strepsiptera and Anoplura, with reference to the con- 
nexion which exists between Structure, Function, and Instinct. 
Read January 19th, 1847. 
IN the memoir on Meloé which I had the honour of communicating to this 
Society in November 1845, I endeavoured to trace the natural history of the 
genus. Hereafter I propose to enter fully on the anatomy of the species, in 
the larva, nymph, and imago states, and to compare it, so far as we are able, 
with that of allied genera. 
On the present occasion, before entering on the details of special structure, 
I shall endeavour to show that structure and instinct are closely associated ; 
that the whole of those groups of insects which are most nearly allied to the 
Meloés in general organization are also very similar to them in their habits 
and economy ; and that, in their larva state, they have many analogies with 
the Anoplura, and with the Strepsiptera, the history of which I shall trace, to 
compare with that of Meloé. In those insects in which the general form of 
body, or of any important organ, is markedly different from the type we are 
considering, we always find that there are corresponding differences in the 
economy of the species. When the entire organism of a structure is modified, 
then the functions of that structure, and the habits of the species associated 
with it, are in some respects completely changed. But when a structure is 
simply hypertrophied, or atrophied, then that particular instinct, of which it is 
the agent, continues to be more or less strongly characteristic of the animal. 
This law of accordance between structure and function is universal through- 
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