DIGESTIVE ORGANS OF INSECTS. 213 



feeder, devouring great quantities of leaves of 

 plants, and consequently requiring a long and 

 capacious canal for their assimilation ; as is 

 shown in Fig. 319, which represents them pre- 



pared in a manner similar to the former. In 

 this herbivorous insect, the oesophagus (o) is, as 

 might be expected, very short, and is soon dilated 

 into a crop (p) ; this is followed by a very long, 

 wide, and muscular stomach (s), ringed like an 



