PLATE II. 



JtWIIT.SS 



t^ 



A Cockroach {Periplaneta orientalis). 

 (From Rolleston.) 



a, antennae ; b\, 62, £3, tibiae ; c, anal cerci ; d, ganglion on recurrent nerve upon the crop ■ e. salivary 

 duct; /, salivary bladder; g, gizzard; k, hepatic caeca ; i, chylific stomach; j, Malpighian 

 vessels: k, small intestine; /, large intestine ; m, rectum ; «, first abdominal ganglion; o, ovary ; 

 /, sebaceous glands. 



