44 



PHYSIOLOGY OF THE INVERTEBRATA. 



triaBgular plate wHch bears two large palps/' The maxillai-y : 

 palps iu the Lepidcyptera are greatly elongated, and form a 

 sucking proboscis. The crop projects from the side of the 



Fig. 7. — Alimentary Canal of the 

 Larval Lepidoptera. 

 m = mouth. = oesophagus, a = salivary 

 glands i = spining glands, i ='chylific 

 stomach. d = Malpighian tubules. 



e = intestine. /= rectum. 



Fig. 5. — Alimentary Canal of 



the Lepidoptera. 

 a = proboscis (maxillse). d = sali- 

 vary glands. <^ = oesophagus. 

 . d = crop, e = chylific ventri- 

 culus. / = small intestine. 

 i = rectum. A = Malpighian 

 tubules, g = large intestine. 



long oesophagus (Fig. 6). The " chylific " ventriculus is very 

 small, but is sacculated. The small intestine is short and 

 passes into the wide rectum. In the larvae of the Lepidoptera 

 the oesophagus is short and wide (Fig. 7), and passes to a long 

 chylific stomach. The intestine is short, and terminates in 

 the rectum. Both in the larval and perfect state there ave 

 well-developed salivary glands and Malpighian tubules. The 



