ues, 
are in every particular essentially identical with the third generation. 
Both of these generations are also Aleurodiform, differing but slightly 
either in coloration or size from the two preceding generations, obvi- 
ating, therefore, the necessity of repeating their cycle of transforma- 
tions. The fifth generation attains maturity about the middle of 
August or later, and gives birth to larvee of the sixth generation. The 
number of larve deposited by individual females of the Aleurodiform 
Fic. 8.—Hormaphis hamamelidis: Third generation, fourth or final stage; a, dorsal view; }, 
ventral view; c, lateral view; d, dorsal view, showing arrangement of pores; e, end of body— 
much enlarged (original). 
generations is extremely variable. Many of these females are com- 
pletely devoid of ova and die soon after attaining maturity; others 
may deposit one or a few larvee, while the most prolific deposit from 
ten to fifteen or more. 
With the appearance of the sixth generation a new cycle of forms 
begins to make its appearance, in which the aspect of the insects has 
changed completely, so much so that the casual observer would fail 
