ORTHORRHAPHA 

 NEMATOCERA 



Culicidae 



f 



Fig. 14. Larva, Corethra. Introvert, plain. 



Fig. 15. Larva, Corethra. Introvert, with included 

 air vesicle. 



Fig. 1 6. Larva, Corethra. 



Figs. 14-17. Corethra pluinicornis F. 



Fig. 14. Larva showing introvert 2'5 mm. from 



back of head to end of introvert. 



Fig. 15. Larva showing proboscis 3 mm. from 



back of head to end of proboscis. 



Fig. 1 6. Transparent larva, 7 mm. 



Fig. 17. Pupa, 7 mm. 



(Micro-slides, Waddington.) 



Fig. 17. Pupa, Corethra. 



