LECTURE i:^. 
89 
less than sixs in number^, and in some insects much 
more numerous. They are, in general, divided or 
marked into a regular thigh, leg, and foot, which 
latter generally consists of several joints, and is 
in most insects terminated by a pair of Curved 
claws. 
' Tlie Moiith in sonie tribes of insects is formed 
for gnawing or breaking the food, and operates by 
a pair of strong, horny jaws, moving laterally, as 
in the Beetle tribe j while in others it is formed 
for suctinn, and consists of a tubular organ, fur- 
nished with proper accompaniments for facilitating 
its operation. In the Butterfly and Moth tribe it 
consists of a double tube, of diflerent length in 
the different species, and when at rest, is rolled 
into a spiral form, and extended at full length when 
in use. 
The Stomach varies in the different tribes of 
insects, and the intestines are generally rather 
strait, or usually make but few turns or bendings. 
The existence of the Brain in insects is denied 
by LinnEeus, but by this he can only be supposed 
to mean that it does not bear much resemblance 
to that of larger animals. In reality it is, as may 
be imagined, very small, and from it extends along 
