is not onhr a prominent labium in 5 Stage, but it is armed with 
sensoria. The function of the ner- :cni is r nded 
during the entire life of aleyro ■ similar s: ^airs 
is found in such forms as ;his indicates little. Hm 
gest: 7.1. with a few alterations, seems to pass over from the 
larva to the adult. The reproduct: _ ins develop in the pupal 
stage and some, though not iults 
without question feed, for they may be seen in the act and the h 
dew a further evidence of this. It would appear that 
during the first part of the last (pupal lie insect lives a life 
dmilar to that led in the earlier g During :.rt. how- 
-hort time, while transformation 
takes place within the larval skin. This change appears to be gradual 
in some respects and the metamorphosis in the Aleyrodida? may be 
considered as of an intermediate type. 
The adult emerges through a T-shaped opening on the dorsum of 
the pupa case. A short time before this opening is noticed, the in- 
sect may be seen fully formed within the case, and rowds in 
from the edges the rupture takes place. The thorax is first to em _ 
followed by the head. The antennae and legs are next worked free 
and the insect assumes an upright or recurved position similar to that 
adopted by many other insects in this proces- Finally the abdomen 
rked free and the insect moves away. The time normally occu- 
pied in this pro few minutes. TThere the pupa 
are hard, however, a much longer time is required and it is not un- 
common to see in ggl e f° r hours and finally die without being 
able to free themselv rr the adults have left the case it requires 
some minutes for the wings to expand and the colors and waxy secre- 
tion to develop. Morrill and Back* have given careful observations 
on the act of emergence of Aleyrod- . which in the main agree 
with ours here recorded. They also ^rive the effects of temper 
and humidity on the emergence of that species, stating M that temper- 
ature and not humidity is the more important factor governing 
emergence in Florida.** On the other hand. Mr. E. S. Woglum, of 
the Bureau of Entomology, who has made extensive observations on 
-pecies in India and the f the opinion that humidity 
verning factor. II that the emergence of the flies, 
at least in any numbers, always follows a rise in humidity, while the 
optimum temperature under these conditio: her with a low 
humidity :o check emergence. 
CLASSIFICATI' 
:il recer. and Al •/*. were 
recognized for the family Alevrodidje. Within the past three or 
four nera 
