82 BULLETIN NO. 4, DIVISION OF ENTOMOLOGY. 
new growth. Immense numbers were killed by keeping men constantly 
going over the grove, shaking the trees, and killing all that fell on the 
ground. The wingless individuals were readily killed, but the larger 
number of the mature insects saved themselves by flight. This method 
of destruction was kept up until the middle of December, by which 
time very few were found. On very cold days the winged insects were 
nearly dormant and could not fly. Ihave the trees frequently searched 
now, but rarely find the bug. The number of the insects is ineredible. 
When thoroughly shaken, the ground under the trees would be alive 
with the fallen insects, and two days later just as many would be found. 
I despaired of getting rid of them until the cold weather commenced, 
when I found the number rapidly decrease until their nearly total ex- 
tinction. 
As to the damage. The bug first attacks the latest growth, which 
wilts and droops while the bug is sucking; in a few days the shoot is 
dead; the same eye soon sends out another shoot which shares the fate 
of its predecessor, and so on until the eye has the appearance of a large 
bunch, as you will see on twigs sent. After all the tender growth has 
been destroyed the bug inserts his sharp sucking tube in the previous 
growth which has nearly hardened. Here I can only give you the facts 
and my theory; itis a fact that the insect sucks sucb wood, but the 
damage does not follow so quickly ; but very soon after, on such wood 
known to be sucked, numerous bumps appear, which crack and exude 
a sticky sap, white at first, but soon a rusty red, and hard. Later on 
the insects suck the juice from fully-matured wood (an inch or more in 
diameter); on this wood the bumps do not appear, but the same kind 
of sticky sap exudes in tears, which soon harden and redden and are 
what I understand by “red rust.” That the cause and eftect are strictly 
true I can only surmise, but this much [and my men have seen: the in- 
sects sucking the sap as stated and the branches where sucked having 
the appearance described. In the winter months I have found clusters 
of the bugs on the stocks of the buds, two inches in diameter, and always 
an exudation of sap at these places, which I have never observed to 
redden as in the instances stated above. Why this is so, and why the 
insect leaves the more tender bud above to suck the sap from harder 
wood nearer the roots, I can offer no suggestion. At first I was strongly 
inclined to think that red rust was caused by soil-poisoning, but if so, 
why is it that trees have grown for many years on the same soil and 
never had this disease until the introduction of the Green Bug? To 
illustrate: When I bought this place ten years ago there was a field of 
five acres which had been in partial cultivation several years, and on 
which grew spontaneously the tomato and mustard plant, the two plants 
on which the insects thrive the best. (At present I can only find the 
insect on the mustard.) Since my purchase I have kept this field 
constantly growing pea-vines, as well as the forty other acres which 
I have in orange trees, thus giving every encouragement to the in- 
