904 COMPARATIVE ZOOLOGY. 
which undergo no apparent metamorphosis, as Lice, are 
wingless. The Grasshopper develops from the young lar- 
#4 
sl, 
i 
Fic. 171.—Butterfly in the Imago, Pupa, and Larva States. 
va to the winged adult without changing its mode of life: 
the worm-like stage is passed within the egg. In the de- 
Fie. 172.—Metamorphosis of the Mosquito (Culex pipiens): A, boat of eggs; B, some 
of the eggs highly magnitied, d, with lid open for the escape of the larva, C; D, 
pupa; E, larva magnified, showing respiratory tube, e, anal fins, 7, antenne, g; 
F,imago; a, antenne; b, beak. 
