A FEW INSECT ENEMIES OF THE ORCHARD. 
37 
where this scale is very abundant and is probably the cause 
of several trees dying. Mr. Oyler, of Grand Junction, has sent 
me twigs from pear and plum trees in Mesa county containing 
this scale in large numbers. He reports the scale to be scat- 
tered over a large territory and in many orchards, but seemingly 
doing but little harm, except to a single plum tree. Prof. 
Cockerell, of New Mexico, tells me that this scale is found in 
that state on oak, box-elder and cottonwood, as well as on 
various fruit trees. It probably occurs in many orchards in this 
state where it is not suspected at present. 
HOWARD’S SCALE {Aspidiotus howardi). 
This scale is a comparatively new species and was first dis- 
covered by the writer upon native plum trees at Canon City, 
Colo. The scales infest both the tender bark of the twigs and 
the fruit. The scales are of about the same size as those of the 
two preceding species, but they are almost white in color and 
lack almost wholly the reddish center. This species seems to 
have decreased rather than increased since it was first discovered. 
If it occurs in any abundance it will probably be found con- 
spicuous on the fruit of plum trees. 
A SCALE UPON PEACH TREES {Lecanium persicae). 
I have just recently received from Mr. A. F. Reeves, of 
Montrose, Colo., peach twigs from his locality infested with a 
large rust-colored scale about three-sixteenths of an inch long 
by about one-eighth of an inch broad. The scales are prominent 
and stand out like little galls on the bark. The scales were very 
abundant on the twigs sent, and, when received, March 28, the 
young lice had hatched and were thickly scattered over the twigs. 
From their size, it seems probable that they hatched last fall. 
Mr. Reeves reports the scales on about forty trees, so far as he 
can determine. As the young of this species appear all within 
a short time, it is probable that this scale can be easily kept in 
check by the use of a strong kerosene emulsion, or a strong 
solution of fish-oil soap soon after hatching. It will be compara- 
tively easy to treat them while the foliage is off the trees. 
Whale-oil or fish-oil soap, lime, sulphur and salt washes, 
resin washes and kerosene emulsion are the most common reme- 
dies used against the scale insects. 
THE BROWN OR CLOVER INIITE {BryoUa pratensis). 
This is one of the worst pests on fruit trees, especially pear, 
apple, plum and cherry, in the mountainous districts of Colorado. 
