INSECTS 43 



slender body of the insect is terminated by two or three very 

 fine tails. The body of the female is usually thicker than that 

 of the male. The legs are long, the front pair being so carried 

 as to resemble antennae. In certain species the legs of the 

 male are more than usually long, and often very original in 

 shape. In most varieties we find that the female is by far the 

 stronger (if size means strength), and seems more adapted to 

 "this work-a-day world" than her mate, who is by far the 

 more beautiful creature of the two. 



The eyes of the male are larger than those of the females, 



MAY-FLIES 



1. Adult. 2. Nymph. 



and in certain species (Cloeon) the compound eyes of the former 

 are most extraordinary structures, being divided into two 

 kinds, one pair situated on pillars, the other pair placed on 

 the side of the head in the normal position. As if not satisfied 

 with two sets of compound eyes, Cloeon has also three single 

 eyes, thus making a total of seven. Some naturalists believe 

 that the compound eyes are especially adapted for observing 

 movement. If this be so, we can hardly imagine what the 

 may-fly with two sets of compound eyes must see, especially 

 during the dance of which further mention will be made. 



The male insect differs from the female in having a pair of 

 claspers at the end of its body. 



