B 



C 



Frontispiece. Transformation of a Gnat (Culex). Magnified 

 5 times. 



A. Larva. (The head is directed downwards and the tail- 



siphon with spiracle points upwards to the surface of 

 the water.) 



B. Pupal Cuticle from which the Imago is emerging. (The 

 pair of 'respiratory trumpets' on the thorax of the pupa 

 are conspicuous. The wings of the Imago are crumpled, 

 and the hind feet are not yet withdrawn.) 



C. Adult Gnat. Female. 



