70 
and looks as if it will be able to live right on indefinitely. The 
interior and shaded branches, instead of dying out, as they often do, 
have a color, thrift, and vigor often absent in groves never found by 
a white fly. These trees gave a fairly good crop of oranges last year, 
this year promising to just about pay for the cost of maintenance. 
No spraying has been done or other measures of suppression taken 
against the insect for some years in this grove. Considering its 
unquestionable vitality under such circumstances and the vulner- 
ability of white fly to parasitic and predaceous attack, it seems 
impossible to doubt that natural agencies other than fungi will come 
to the relief of the trees before their life is spent. However, I have 
seen trees unmistakably killed by the insect, and the interior branches 
very often die from its attacks. 
UNRECORDED POINTS IN ITS LIFE HISTORY. 
Some adult flies of the fall brood may be observed, by reliable report, 
in early December, all eggs hatching before the middle of that month. 
Nearly all the insects are in the third or fourth stage before January 
1, the eggs of a few stragglers alone furnishing specimens in the first 
or second stage. I recall no instance at all of having observed the 
first stage as late as Christmas. The earliest imagos were observed 
upon some lemon bushes in a few very sunny and sheltered spots at 
Ellenton, Fla., on the 11th of February... Egg laying had already com- 
menced at this date. The body of the spring brood, however, does 
not appear until in April and May. This irregularity of appearance, 
with the late and early dates for imagos, suggests that the late 
November and early December representatives belong to a straggling 
fourth or winter brood. Further confirmation of such a guess may be 
found in the marked overlapping of broods, especially noticeable in 
the spring. This overlapping, every possible-stage of the insect being 
represented at the same date, may be observed in one spot, but its 
value as evidence of a fourth brood is somewhat diminished by the 
fact that the appearance of corresponding broods may vary two or 
three weeks in places not 20 miles apart. 
A leaf of young orange, 5 inches long and 24 inches wide in the mid- 
dle, collected at Myers June 22,1901, by careful mathematical compu- 
tation had upon it upward of 20,000 eggs. While so many eggs upon 
so small a space is rather unusual it can not be said to be rare, for I 
have observed them as thickly placed many times. 
SPRAYS. 
Resin wash is the spray most commonly used to destroy the insect. 
In the hands of one who understands its use satisfactory results are 
almost certain to follow. If noattention at all is given the insect, the 
smutted fruit must be cleaned with a dampened cloth and sawdust or 
by some form of brush machine, the carrying qualities of the fruit 
being much impaired by either method. Kerosene sprays are as 
effective as the resin wash. 
