Plate XL VI 



Stages of Simuliidae 



Fig. 1. Simidium joliannseni, larva, dorsal view. 



Fig. 2. Simulium piscicuHum, pupa, lateral view. 



Fig. 3. Simulium joJiminseni, pupa, lateral view. 



Fig. 4. Simulium ve7iusium, pupae in their cocoons. 



Fig. 5. The same, head and thoi-ax of male imago. 



