ILLUSTRATIONS 



FIG. PAGE 



1. THE HOUSE FLY (Musca domesticd) . Frontispiece 



(From the model by Mr. Ignaz Matausch in the American 

 Museum of National History.) 



2. EGG OF A HOUSE FLY . . . . .7 



3. EGG OF A HOUSE FLY, SHOWING LARVA OR GRUB 



ISSUING FORTH . ... . 8 



4. FULL-GROWN LARVA OF A HOUSE FLY ..--.. 9 



5. PUPA OR CHRYSALIS . . . i . 9 



6. A DIAGRAMMATIC FIGURE OF THE HOUSE FLY . 12 



7. TRACKS OF A FLY ON GELATINE. , ' . . 15 



8. ENLARGED FOOT OF A HOUSE FLY . . 15 



9. THE HEAD OF A HOUSE FLY, SEEN FROM ABOVE 22 

 10. THE HEAD OF A HOUSE FLY, SEEN IN PROFILE. 23 

 ir. THE UNDERPARTS OF A HOUSE FLY . -.-' . 26 



12. SIDE VIEW OF A HOUSE FLY . . .- . 35 



13. A CHAMELEON IN THE ACT OF CAPTURING A FLY 42 



14. MASSES OF EGGS OF THE HOUSE FLY. . . 46 



15. MAGGOTS OF THE HOUSE FLY IN MANURE. . 48 



1 6. DRAWING ILLUSTRATING THE HABITS OF THE 



HOUSE FLY . .... . . 54 



17. ADULT MAGGOTS AND PUP^E OF THE HOUSE FLY 60 



1 8. CHRYSALIDES OF HOUSE FLY . . v . 63 



19. A CHEAP AND EFFECTIVE FLY DESTROYER . 70 



20. THE BITING STABLE FLY . . . . -77 



21. WINGS OF HOUSE FLY AND STABLE FLY FOR 



COMPARISON . . ... . . . . 80 



22. FLY WITH WORLD IN ITS GRIP; ALLEGORICAL 



PICTURE . 86 



