[ 33 J 



S E C T. VII. 



Whoever is delirous of attaining a 

 fyftematic knowledge of infe£ts, onght 

 primarily to be folicitous about acquir- 

 ing the terms made ufe of in the icience, 

 that fo he may be able rightly to deno- 

 minate every part of an infe£t. This 

 theii,asthefirll:rudimentsofthefcience, 

 we mall begin with. The ftudent is 

 firft to know what an infect is, left he 

 miftake hippocampi, and other amphi- 

 bious animals, for them, as was former- 

 ly done, or confound them with.the 

 vermes,whichLinn3eusfirftdiftinguifh- 

 ed from infe&s, and which differ as ef- 

 fentially from them as the clafs mam- 

 malia do from birds. Every infeft is 

 furnilhedwith a head,antennae,andfeet, 

 of all which the vermes are deftitute. 

 All infefts have fix or more feet ; they 

 p refpire 



