TO 



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 gi'oves 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. 

 Xo spraying has been done or other measures of suppression taken 

 against the insect for some years in this grove. Considering its 

 tinqiiestionable vitality under stich circumstances and the vulner- 

 ability of white fly to parasitic and x3redaceous 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. 



rXRE CORDED POINTS IX 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. 

 Xearly 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 aj^pearance, 

 with the late and early dates for imagos, suggests that the late 

 Xovember 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 i^laces not 20 miles apart. 



A leaf of young orange, 5 inches long and 2^ inches wide in the mid- 

 dle, collected at Myers June 22, 1901, by careful mathematical comx)u- 

 tation had upon it upward of 20,000 eggs. AVhile 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 no attention 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 tlie fruit 

 being much impaired by either method. Kerosene sprays are as 

 effective as the resin wash. 



