376 



THE NATIONAL GEOGRAPHIC MAGAZINE 



Photo by N. A. Cobb 



Copyright, 1 910, by the National Geographic Magazine 



FRONT VrKW OF THE H^AD OF A HOUSE-FLY 



The same head is shown in profile on the opposite page. The fly is one of the most 

 highly organized of insects. The two large areas studded with thousands of facets are the 

 compound_ ej^es. The three simple eyes are seen at the top of the head in the middle. See 

 also top view of the fly. The two large pendant organs with "peacock feathers" on them are 

 the antennae, or "feelers." A fly can see in all angular direct^'ons. 



