WEALTH OF INSECT LIFE 



187 



we find winged individuals, capable of carrying the spe- 

 cies into new localities, and wingless forms whose sole 

 duty is the reproduction of their kind. 



Among; the most anomalous forms of insect life 



o 



FIG. 155. Adult female 

 scale insect (Kermes ni- 

 valis) living oo oak twig, 

 showing a form which 

 does not secrete a pro- . 



tective covering. En- 

 larged. Photographed 



from nature. 



FIG. 156. An unprotected scale. Adult female scale 



insect (Lecanium aurantiacum) living on osage-orange 

 branch. Enlarged. 



are the scale insects. The young either come forth 

 from eggs or are given birth, both sexes at first being 

 alike, resembling mites (Fig. 153), and subsisting upon 

 the juices of plants and trees. As they develop, the 

 males go through complete metamorphosis, and emerge 

 as insects with one pair of wings, but without mouth- 

 parts. The female passes through an incomplete meta- 



