The Life Processes of the Individual 
145 
Fig. 77.—Histological details of alimentary canal of worker: A, cross- 
section of ventriculus; B, section of ventriculus wall; C, section of 
Malpighian tubule; D, cross-section of small intestine; E, section of 
ventriculus wall, showing formation of enzyme cells: F, section of 
anterior end of rectum, showing rectal glands ( RGl ); G, slightly 
oblique section of posterior end of ventriculus, showing openings of 
Malpighian tubules. 
larval food is regurgitated can no longer be considered as 
at all tenable. 
Behind the ventriculus, the alimentary canal narrows 
to form the small intestine (Fig. GO, Sint) and at the point 
L 
