THE BTRl CTUh 13 



digestive canal by osn 



with tin' currents of bl I which pass aloi 



la* i ral parts of t be body. 



Int.) the | end of the stomach empty the urin 



tubes, their secretions passing into the into I 



ins are exclusively depuratory and urinary, n 

 tin- body of tin- waste products. Tin' liquid which the; 

 crete contains area (?), uric acid, ami urates in abundai 

 hippuric acid (?). chlorid< i in in. phosphates, carbonate 



of lime, oxalate of lime in quantity, leucine, and • 

 matters. 



Tin- uervous system of tin- locust, a- of other it 

 sists of a series of nerve-centres, or ga . which an 



hf\ 



wC& 



i ".'." 



F 1 1 : ?- -l i inal of S 



n^'u-c: f. ./. stomach; h. Intestine; i, urin 

 and Niteche. 



iir. ted l'\ two cords i :ommissures), the two cords it: 

 parts of the body in Bome insects united into There 



are in the locus! ten ganglia, two in the head, three in the 

 thorax, and five in the abdomen. The first ganglion is 

 rather larger than the others, and lied the "brain." 



The brain rests upon the oesophagus, whet me, 



supra-oesophageal ganglion. From the brain arise ti 

 short, optic nerves (Fig. 3, . which 

 eyes, and from the" front arise the thi 

 which arc sent to the three ocelli (F om im- 



mediately in front, low down, ar - nal m 



(Fig. 4, at). 



The infra-CBsophageal ganglion (Fig. 8., - name 



implies, lies under the oesophagus at the 



