t ] 



VL DiPTERA. InTefts with two wings; fur- 

 niflied alfo with a balance or club behind each 

 wing. 



This order, under lo genera^ contams near 270 

 fpecies, among which are the Gad-flies, Gnats, 

 Common Flefh-fly, Wafp-fly, Horfe-fly, Bee-fly, 

 and others. 



VII. Aptera. Infeds without wings, in either 

 fex. 



This order contains 290 fpecies under i^genera^ 

 and falls eafily into three divifions. 



1. With 6 legs : The Sugar-mite, Ground-flea, 

 Death-watch, Loufe, Common Flea. 



2. With 8 to 1 1 legs ; The Tick-fpiders, Scor- 

 pion, Crab, King-crab, and Millepede. 



3. With numerous legs : The Centipede and ' 

 Gallyworm. 



In forming the genera under each of thefe or- 

 ders, the antenna hold a principal rank, and par- 

 ticularly in the Coleoptera ; but the author 

 does not trufl: to them alone ; the elytra or out- 

 ward cafes, the head, the roftrum or mouth, the 

 thorax, and tail ; and indeed in almoft every genus^ 

 fome or other of them are called in to afiift in 

 forming the character. 



In the He MI FT ERA, the roftrum gives a note of 

 primary ufe j but here the antenn^^ wingSy and 

 feet come in alfo. 



In the Lepidoptera, the antenna and wings 

 form the charadler. 



In the Neuroptera, the rrvouth^ wings, and 

 tail. 



H 4 In 



