360 



ELEMENTS OF BIOLOGY 



(Fig. 216) are also frequently confused. The Hymenoptera include f 

 the bees, wasps, and ants, while the Diptera are the flies, gnats, 



MOTH 



Fig. 215. — Compare the antennae of the moth and butterfly. 



midges, and mosquitoes. The distinction between the two orders is 

 sharp; bees, wasps, and ants (when the last named have wings) 

 have two pairs of wings, while the Diptera have but a single pair. 



