HEMIPTERA 



147 



group, the species differing greatly in appearance, habits, and metamor- 

 phoses from those of the most closely allied families, and even the two sexes 



Fig. 117. — Phylloxe'ra vasta'trix: a, Sexed stage larvifonn female, the 

 dark-colored area indicating the single egg; b, egg, showing the indistinct 

 hexagonal sculpturing; c, shriveled female after oviposition; d, foot of 

 same; e, rudimentary and functionless mouth parts. (Marlatt.) 



0- 



1'^ >1 



% 



/ 



^ 



Fig. 118. — Ladybird feeding on scale insects, Pentil'ia (Smilia) misel'la: 

 a, beetle; b, larva; c, pupa; d, blossom end of pear, showing scales with 

 larvae and pupie of Pentilia feeding on them, and pupse of Pentilia attached 

 within the calyx; all enlarged. (Howard and Marlatt, Bull. U. S. Dept. 

 of Agriculture.) 



of the same species, says Comstock, differ greatly. The males, unlike all 

 other members of the order, undergo a complete metamorphosis. The adult 



