634 



E. N. PAVLOVSKY 



reopening them. Gradually the prey crumples and is thrust 

 in deeper and closer to the oml opening. 



In the grinding and kneading not only the mandibles take part 

 Ijut also the antennae, which in the larva at the first stage 

 have a special contrivance for this purpose in the form of a row 



Text-fig. 4. 



Lower lip of mature larva. Dentation of lateral margins and 

 sensory cones of upper surface of base of lip (//(). On the sides 

 spined folds of the connective chitinous cuticula {st). Ig, ligula ; 

 ■pll, paljH labiales. Zeiss, ob. AA, oc. 0. 



of sharp teeth 0]i the inner edge (Text-ligs. 5, 7, a). These 

 teeth are chaetoids (after the terminology of Xasonov, 1901), 

 i. e. they are evaginations of the integument of the larva and 

 the body-cavity is continued into these appendages. The 

 antennae of the mature larva do not take any energetic part 

 in the mastication of the prey, having on the inner edge about 

 three rows of long flexible setae (Text-tigs. 6, a, 7, h), which are 

 therefore inconvenient for tearing or kneading the prey. 



