Photo by N. A. Cobb Copyright, 19 lo, by the National Geographic Magazine 



MALE HOUSE-FLY RESTING ON GLASS AND SEEN FROM BELOW 

 In addition to two claws, each of the six feet is supplied with two light colored sticky 



pads. 



great 

 mov 



in addition to two claws, each of the six feet is supplied with two light colored sticky 

 s. Germs and spores stick to these pads, and are thus carried from place to place with 

 at rapidity, for the fly travels fast and far on its own wings, and on cars, boats, and other 

 vmg things. The fly cleans its feet carefully whenever thev become contaminated, thus 

 loving many of the germs that would otherwise be soread. but not all. 



■ ---o 1.....^,^-. i ■■,_ iiv (^ji^aii^ lis iccL (.fiicnuiy uiieilCVCl lliev UCCOme 



removing many of the germs that would otherw"ise be spread, biit not all 



