^48 Microscopical Essays. 



have leifure to extend further the anatomy of infects ; for it is 

 only by a comparifon of their's with that of man, that we can ever 

 afcertain their true place in the fcale of creation. If this com- 

 parifon could be accurately difcovered, the true philofopher 

 would be able to trace their final caufe, or rather the originating 

 fource of their existence, and point out the degree in which they 

 accorded with thofe laws of goodnefs and truth, by which the 

 univerfe and all it's parts are regulated and governed. 



The head, as reprefented in thefe figures, is magnified about 

 three hundred and forty-three tknes ; it is feparated from the 

 neck, and difengaged from the fat. The figures here under con- 

 fideration reprefent the head in the third and fourth ftate of ex- 

 amination, when a great many parts had been removed, in order 

 to difcover thofe that are here feen. 



H H, the two palpi. The truncated mufcles D belong to the 

 lower lip, and form a part of it's moving mufcles. K is the two 

 ganglions of the neck united. II, the two filk vefTels. L, the 

 oefophagus. M, the two diffolving vefTels. 



J^ nn are the continuation of four cephalic arteries. Fig. 5, 

 S S, T T, V V, and Z, are the ten abductor mufcles of the jaw. 

 Fig. 6, under e e and f f, are feen four occipital mufcles. a k, a 

 nerve of the firft pair belonging to the ganglion of the neck ; b, 

 a branch of this nerve. 



Fig. 



