102 Mr. W. Seili's Entomological Notes. 



where the several changes are exhibited together, under one 

 view ; for instance, in the case of the bot among the Dlptera. 



a. Horsehairs upon which the ova have been deposited ; 



b. larvae in the several stages of growth ; c. the pupa ; 

 d. imago of both sexes. 



The Economy of Particular Insects. 



1st. Bees; showing the numerous and beautiful facts apper- 

 taining to this race of creatures ; as comb, nests, parasites, 

 &c., &c., in the honey, mason, carpenter, upholsterer, and 

 other bees, including the Bomhi. 

 2nd, Wasps illustrated in a similar manner. 

 3rd. Hornets ditto. 



4th. Silkworms, and other silk-spinning larvae. 

 5th. Gall insects. 



6th. Spiders 3 their nests, egg-cases, silk, &c. 

 Sexual Distinctions ; exhibiting the more striking instances in 



the several orders. 

 Monstrosities ; hermaphrodism and imperfect development of 



parts. 

 Analogies between insects of different orders. 

 Position of Wings, in repose. 

 Parasites ; a most interesting department. 

 Contrasts, as of insects, with the other classes of insects, viz., 



magnitude and minuteness. 

 Insects injurious to Man ; directly, to his person, 



indirectly, as attacking animals, viz. the horse, cow, sheep, &c. 

 as attacking vegetable substances, viz. the turnip, 

 hop, sugar-cane ; the wood-borers and timber- 

 feeders ; the destroyers of wool and furs ; with 

 specimens of the injured material. 

 Insects useful to Man ; as cochineal, gall, silkworm, &c. 

 Dissections of insects. 

 Miscellaneous. 



Notes. — Eggs should be punctured with the finest of needles, 

 when they will dry without shrivelling ; hot water destroys colour 

 and makes them contract. 



Larvae that have been long immersed in spirits, and thereby 

 much hardened, admit of being opened, stuffed with cotton, and 

 dry very successfully. 



Good illustrations of the principal digestive organs and parts 

 of generation in insects, may often be procured from even old 

 and otherwise damaged specimens, by immersing them in boiling 

 water for a minute or two ; and although the more delicate 



