17S OTHEIi MEMBERS OF THE CLASS - INSECTA 



;-(.hi>' harvest fly. 



They are often excco(liiii!:ly injurious antl, henee, of great 

 economic inijiortancc. The San Jose scale insect is ])rob- 



abh' the most important 

 si^ecies in the United 

 States (Fig. 120). It is 

 a great pest to apple, 

 pear, and peach trees. 



Butterflies and moths. 

 — The butterflies and 

 moths constitute the 

 \\'ell-kno\vn order Lepi- 

 floptera (scale wing). 

 Tlie wiiifis arc four in 

 rnnriber and claiheil with 

 fine delicate sc<des. The 

 nictftiiiarphosis is com- 

 plete, tlie moiitli parts are 

 formed for suekinij, and 



F1C..12O. — San.Jos6scalcins,H-t ;»M.inlr //„, /„,.,,„, ,-„,^ ^.^,//p(^ ^^^g^. 

 scale;./, female scale; //, young scale; . 



a, young insect. I'^nl-argetl. pUiCi/S. 



