XXI 
The HauJiellum confifts- of fetas, either naked, or 
inclofed in a fheath, which is bivalve, and without 
joints this belongs to all the genera of the clafs 
Diptera. 
The Probofcis is flefhy, with a cylindrical Hem, 
ftrait, having a capitulum or knob, furnifhed with 2 
lips, and capable of being drawn back this is found 
in many genera of the clafs Diptera..—The Probofcis 
differs from the hauffellum, as it has always two lips, 
the hauffellum never. The fetae of the hauffellum 
often lie in the {haft or ftem of the probofcis. 
Fabricius takes the characters, of his dajfes from the 
various conf ruCtions of the mouth . 
His fyfem , more modern than that of Linnaeus , is 
much admired * 
ANTENNJl. 
Are not found in the Spider, and Phalangium. Are 
two in- general *, four in Onifcus, and fix in the 
Lobfter.. 
> 
Antennae are termed filiform, or fetaceous, in 
refpe£l to their whole figure, the joints not being eon- 
fiderecL 
Capitate Antennae, in different fpecies have their 
capitulum or knob of different forms: this may be 
remarked likewife of the crub-fhaped* as the club i-S 
cither entire, or perfoliate* &c» 
The 
