768 . NEW YORK STATE MUSEUM 
noted. Many small limbs were dead, probably winterkilled, om 
trees 47, 90 and 114. A large dead limb had been cut off of 
tree 45, the tops of trees 47 and 90 were thin, and all that 
remained of tree 72 was a stub with vigorous suckers. 
July 3, the following conditions were noted. There were very 
few or no young scale insects on trees 26, 27, 46, 47, 72, 90 and 
113; very few young were found on trees 74, 112 and 114; few 
young were found on tree 28; young were rather abundant on 
tree 45, and abundant on tree 73. At this time the sprouts on 
tree 72 were growing slowly. 
_ Aug. 9, the conditions were as follows. There were very few 
or no young on trees 26, 27, 45, 46, 47, 74, 90, 91, 112, 113 and 
114; young were rather abundant on tree 28, and abundant on 
tree 73. ‘Tree 72 was represented only by a stub at this time. 
Sep. 25, the following conditions prevailed. There were few 
or no living scale insects on trees 26, 27, 46, 47, 91 and 1138; 
there were very few on tree 28; few on trees 45, 72 and 90; 
relatively few on trees 74, 112 and 114; and they were very 
abundant on tree 73. 
The condition of this lot of trees Sep. 25 was fairly satisfac- 
tory if we except tree 73, and the occurrence of abundant young 
on this can be explained only by the probability of a number 
of insects being so sheltered by the very rough bark that the 
spring application of petroleum did not reach them. The pres- 
ence of a few scale insects at the end of the season on trees 
45, 72 and 90 is not surprising, considering that they could 
have easily become infested from other trees, even if all 
the living scale insects on them at the time of the treatment bad 
been killed by the petroleum. The occurrence of more living 
seales on trees 74, 112 and 114, all of them located on the ex- 
treme edges of the orchard and in positions where they would 
be most likely to have the pest carried to them by birds and 
other insects, gives additional weight to the opinion that the 
results produced by the various insecticides have been modified 
during the growing season by the conveying of crawling young 
scale insects to the trees by various natural agents. A. very 
