xii 



Illustrations 









PAGE 



Fig. 



23. 



Stable-fly (Stomoxys calcitrans) 





Fig. 



24. 

 1 



A black-fly (Sitnulium sp.) 



A C 

 45 



Fig. 



25. 



Screw-worm fly (Chrysomyia macellaria) 



4o 



Fig. 



26. 



Blow-fly (Calliphora vomitoria) 



AC 

 40 



Fig. 



27. 



Bluebottle fly (Lucilia sericata) 



CO 



Fig. 



28. 



Flesh-fly (Sarcophaga sp.) 



CO 



Fig. 



2Q. 



y 



"The little house-fly" {Hotnalowiyia canicu- 











51 



Fig. 





HORSE BOT-FLY (Gastrophilus CQlli ) 



CT 

 0 1 



Fig. 



31. 



Ox- warble fly (Hypoderma lineata) 



CI 



Fig. 



32. 





CI 



Fig. 



OO' 



Chigo or jigger-flea, male (Dertnatophilus pene- 











■54. 



Fig. 



34. 



CHIGO, FEMALE DISTENDED WITH EGGS 



C4 



Fig. 



3C. 



Bedbug (Citnex lectularis) 



cc 



Fig. 



36. 



Body-louse (Pediculus vestimenti) 



cc 



Fig. 



37. 



One use for the house-fly 



0 / 



Fig. 



38. 



The house-fly {Musca domestica) 



0 u 



Fig. 



30. 



Head of house-fly showing eyes, antennae and 











60 



Fig. 



40. 



Proboscis of house-fly, side view 



60 



Fig. 



41. 



Lobes at end of proboscis of house-fly showing 









CORRUGATED REDGES 



61 



Fig. 



4.2. 



Wing of house-fly 



61 



Fig. 



43. 

 to • 



Wing of stable -fly (Stotnoxys calcitrans) .... 



62 



Fig. 



44. 



Wing of house-fly showing particles of dirt 









adhering to it 



62 



Fig. 



4? 



Last three segments of leg of house-fly . 



62 



Fig. 



46 



Foot of house-fly 



6* 



w o 



Fig. 



47. 



Larva of house-fly 



63 



Fig. 



48. 



Barnyard filled with manure 



64 



Fig. 



49. 





65 



Fig. 



So- 





76 



Fig. 



Si- 





76 



Fig. 



52. 



Mass of mosquito eggs (Theobaldia incidens) . . 



76 



Fig. 



S3- 



Mosquito eggs and larvae (T. incidens) .... 



77 



Fig. 



54- 



Mosquito larva (T. incidens), dorsal view . . . 



77 



