17 
Division of Entomology. Here is the list as given : Apple, crab apple, 
quince, pear, Bartlett pear, dwarf Duchesse pear, plum, Japan plum, 
Satsuina plum, Prunuspissardi, Primus maritima, peach, apricot, almond, 
cherry, Kocky Mountain dwarf cherry, currant, black currant, Citrus 
trifoliata (this should have been albopunctatus), Osage orange, grape, 
elm, cottonwood, European linden, American chestnut, Pyrus japonica, 
Catalpa bignonioides, walnut, Japan walnut, loquat, red dogwood, june- 
berry, rose, sumac, Photinia glauea (does this refer to andromelas ?), 
Carolina poplar. 
Thus the habitat on rosaceous plants is confirmed. As to the excep- 
tions, too much stress should not -be laid upon them, unless, perchance, 
some indicate the beginning of a new race, such as dlbopunetatus. I do 
not find the scale to infest the Osage orange nor the grape .vines in the 
Mesilla Valley, even when they are grown abundantly in the vicinity of 
scaly orchards. 
So far as we know, A. forbcsi has similar food habits, but A. ancy I us 
is different. This last is especially a maple species, and will flourish 
also on Populus, Quercus, etc.; it does not seem to take very kindly to 
fruit trees as a general rule. A. ancylus also does well (probably best) 
in the transition zone, whereas A. perniciosus belongs to the upper 
Austral. 
As to the time of hatching, I have not statistics for the various 
species. At Las duces, N. Mex., I found A. perniciosus to begin pro- 
ducing young as early as April 26. A somewhat later date is given 
for other localities. 
The manner of attack is different, more or less, in the various species 
under discussion. A. ancylus, on fruit trees, will be found upon the 
smaller branches, but in my experience more or less scattered, rarely 
in any great quantity. A. perniciosus is found largely upon the branches, 
becoming very abundant, covering and killing them. On the young 
shoots the reddening effect is very marked, though ancylus will also 
produce reddening. A. forbcsi, as seen on apple trees in Mesilla, occurs 
largely under loose bark on the trunk, wintering there in numbers, and 
only invades the branches in limited quantity. Thus, there may be 
quite a lot of forbcsi on a tree without its being noticed. A. juglans- 
regiw occurs on the trunk and twigs, more or less scattered, or in little 
groups. 
10742— No. 6 2 
