i'^jj-^fffcs- 



231 



(,-' 3.. The Eyes. The eyes are situated later- 

 ally, and can be seen both from the dorsal and 

 ventral surface. Their size and appearance vary 

 with the age of the larva. In the full-grown 

 larva acrescentic compound eye is seen on either 

 side, and behind this a single pigment mass 

 (simple eye). The compound eye is absent in the 

 first stages, and becomes more prominent as the 

 larva approaches maturity. 



4. The Mouth Parts. 



23 4 



Fig. 55. Lateral Hairs of Antennae 



I. M. rossit. 2. N. stephensi. 3- A. lindesayii 



4. M. nigerrimiis 



(a) Two very conspicuous bodies resembling 

 somewhat shaving brushes are protruded or with- 

 drawn under the overhanging clypeus. These 

 are the feeding-brushes, and are employed in col- 

 lecting the minute food particles on which tha 

 larva feeds. 



(b) On either side of the mouth is a broad 

 blade-like structure carrying several leaflets and 

 some hairs (maxillary palps). 



