WESTER: POLLINATION EXPERIMENTS WITH Anonas) 433 
the late Mr.H. G. Hubbard, an assistant of the Bureau, and he 
made some interesting observations on it at Crescent City, Florida. 
The larvae were found by him feeding upon the substance of the 
flower stems of both male and female cones of the coontie plant, 
Zamia integrifolia, but in no way injuring the flower. Mr. Hub- 
bard came to the conclusion that both the larvae and the imagos of 
this little beetle are intended to facilitate the fertilization of the 
plant. The same species was found by me in great numbers on 
the flowers of the Florida palmetto and no further notes have 
been taken by me. The species does not seem to occur in the 
West Indies, nor is anything similar reported from Central America. 
There are various. genera of the family described from South 
America but whether or not this species is identical with any 
one of them can not be ascertained at present.”’ 
onan enact ontantts nite, gine 
FiGuRE 3. Flowers of the sugar apple; a, when the stigmas are receptive 
to the pollen; b, at the time of the discharge of the pollen, (One third natural 
size 
In addition to these species a small thrips frequents the flowers 
of these Anonas and probably to some extent assists in their 
pollination. 
In order to ascertain the validity of the theory of proterogyny 
in the Anonas in question a series of pollination experiments was 
inaugurated in 1908 on all three species, which was concluded this 
spring. In the course of this experiment on a cherimoya tree pol- 
len was applied to the stigmas of twenty-seven flowers at the 
time of the discharge of the pollen in the flower, all of which 
dropped. The pollen was in some instances taken from the flower 
