156 HUGH GLASGOW. 



EXPLANATION Op PLATES. 



ABBREVIATIONS.' 



c caeca. 



i ileum. 



mi first stomach. 



m2 second stomach. 



m$ third stomach. 



>4 fourth stomach. 



mt malpighian tubes. 



r rectum. 



sr salivary reservoir. 



sg salivary glands. 



PLATE I. 



FIG. i. Anasa tristis, posterior portion of alimentary canal with caeca. 



FIG. 2. Peribalus limbolarius, posterior portion of alimentary canal with caeca 



FIG. 3. Thyrecoris unicolor, posterior portion of alimentary canal with caeca 



