LECTURE IX. 89 



less than six 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. 



The Mouth in some 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; while in others it is formed 

 for suction, 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 different 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 bend ings. 



The existence of the Brain in insects is denied 

 by Linnaeus, 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 



