296 GRAMMAR OF ENTOMOLOGY. 



963. After the orders are pretty well known, 

 the study of species must be begun ; for it is a 

 remarkable fact, which the author cannot explain, 

 that classes, orders, and species, are much more 

 readily ascertained, and much more obvious to 

 the casual observer, than the intermediate divisions 

 of stirpes, families, and genera. 



964. It may also be observed, that in general, 

 even with scientific investigators, there is less 

 doubt as to the limits of classes, orders, and species, 

 than those of the other divisions. Genera are the 

 most difficult groups to make out; they depend 

 almost entirely on artificial characters, and their 

 limits have never been agreed on by any two of 

 the numerous writers on entomology. 



965. Most descriptions are written in Latin, or 

 a language intended for Latin ; many words used 

 are peculiar to entomology ; and these the author 

 has endeavoured to explain in the foregoing pages ; 

 other words are purely English, with what is sup- 

 posed to be a Latin termination added. 



966. Examples of this : setaceous is Latinized 

 setaceus ; gross is grossus ; expansion is expansio ; 

 rudimental is rudimentalis ; petiolate is petiolatus. 

 Many Latin words are altered to make opposites ; 

 marginatus signifies having a margin; and to de- 

 scribe an object that has no margin, the word im- 

 marginatus is made ; words, or names, are often 

 Latinized by the simple addition of us or urn. 



967. All .these are to be considered errors ; 



