viii LIST OF ILLUSTRATIONS 



FACING PAGE 



12. Fly-larvse and pupae on waste-paper in ash-pit refuse ; a 



common fly-lair (natural size) (after Newstead) . . 62 



13. Fly- larvae and pupse in old rags taken from an ash-bin 



(natural size) (after Newstead) ..... 68 



14. Mass of pupse in old " flock " bedding (natural size) (after 



Newstead) ......... 79 



15. Mass of fly -pupae (nymphs) separated from stable-manure 



(natural size) (after Newstead) ..... 89 



16. Plan of Port Said marked into areas of daily inspection for 



mosquito-reduction ; the same methods should be used 



for fly -reduction . . . . . . . .93 



17. Fly-pupae in feathers and straw from a poultry-yard (natural 



size) (after Newstead) ....... 95 



18. Mass of fly-pupae in spent hops (natural size) (after Newstead) 97 



