524 



The Animal Kingdom 



series of digestive glands whose ducts open into the pharynx. These 

 are known as salivary glands and produce the brown secretion of the 

 grasshopper. The crop opens into the proventriculus or gizzard, which 

 has relatively heavy muscular walls. At the region where the gizzard 

 joins the ventriculus or stomach, the digestive tract is encircled by 

 eight elongate, double gastric caeca. After a slight constriction, the 



SUPRAESOPHAGEAL GANOtlON 

 CONNECTIVE 



ESOPHAGUS 



SALIVARY GLAND 



GASTRIC CAECUM 



TRACHEA 



.SPIRACLE 

 .VENTRICULUS 



MALPIGHIAN TUBULE 

 INTESTINE 



OVMRIOLE 



VENTRAL NERVE CORD. 

 SEMINAL RECEPTACLE 



VAGINA 

 RECTUM 



Fig. 174. — Internal anatomy cxf the female grasshopper, Romalea sp.; 

 dorsal body wall removed. 



ventriculus enters the intestine. The intestine narrows and is followed 

 by the rectum and anus. Digestion of foods begins in the mouth with 

 the grinding action of the mandibles, and the enzymes of the salivary 

 secretion. The food is temporarily stored in the crop before passing 

 into the gizzard. In the gizzard digestion is continued and the finely 



