EXPLANATION OF PLATE VI. 



Fig. 1. Thorax and liead of the mature larva of Pyretophorus costalis, Lw., seen from the 

 ventral side and showing the pattern mentioned in the text. 



2. Antenna of the same larva. 



3. A plume from the thorax of a 4^ mm. larva of P. costalis ; a typical '' feathered 



hair." 



4. Pupa of P. costalis, lateral view. 



5. A trumpet of the same pupa, enlarged. 



6. Anal plates of the same pupa ; seen from the ventral side, to show the greater 



development of the ribs of the plates and the curious wavy hair at the end of the 

 central processes. 



7. Antenna, o£ ihalavYH oi Celliajjharoensi,^, Theo. 



8. Thorax of the same larva, seen from the ventral side, to show the simple hairs and 



the large bristle at their bases. 



9. Comb of the same larva. 



10. Palmate hairs on the abdomen of the (h) stage of the same larva. To show the 



relative proportion with the segments of the abdomen. 



1 1 . Pupa of Cellia pharoensis, Theo., lateral view. 



12. Anal plates of the same pupa, seen from the ventral side and with the eighth 



segment removed. 



13. Eighth segment of the same pupa removed from its position on the ventral side of 



the anal plates ; to show the male "forcipes " enclosed. 



14. Face plume of the larva of Myzorhynchus matiritiatius, Theo., in the immature stage. 



15. The same, on the mature, or more mature larva. 



16. Palmate hairs on the same larva. 



17. Antenna of the same larva. 



18. Characteristic hairs on the dorsum of the thorax of the larva of Cellia pharoensis. 



19. Comb of the larva of M. mauritiatms. 



20. Pupa of M. mauritianus, lateral view, 



21. Characteristic double hair on the front (face) of the larva oi M. mauntimius. 



