1 68 HUGH GLASGOW. 



PLATE VII. 



FIG. 19. Blissus leucopterus, posterior portion of alimentary canal from normal 

 insect showing the characteristic development of the caeca. 



FIG. 20. Blissus leucopterus, posterior portion of alimentary canal from starved 

 individual, the intestine also slightly stretched to show the grouping of these 

 structures typical of the Blissinse. 



