_—" 
23 
THE ROSE SCALE. 
(Aulacaspis rose Sandberg—fig. 12. ) 
This species is similar to the peach scale, and, indeed, the easiest 
way to distinguish between them is by their host plants. The peach 
scale does not affect the host plants of the rose scale, which are roses, 
raspberry, and blackberry. The scale covering is much more thin and 
delicate and the exuvium is usually of a paler or duller yellow than 
in the case of the peach scale. The keel or ridge of the male is more 
distinct. The life history of this species does not appear to be well 
known in this country. It winters, as a rule, in the egg as far north 
as New Jersey; but mature females and immature females and males 
may be found in winter. In the early spring one 
often finds the female scales surrounded by a radiate 
row of male scales. It is probable that there is more 
than one brood in a year, at least in the South. 
FAMILY APHIDZ (PLANT-LICE). 
The plant-lice are small, sluggish insects found on 
the under surface of leaves or on the bark and roots. 
Most of the individuals have no wings, but at times 
one finds some specimens with delicate transparent 
wings laid roof-like over the body. They all have 
distinct legs, a pair of moderately long antenne, and 
usually quite prominent eyes. They occur in colo- 
nies, and by their numbers often do a considerable 
amount of damage. The eggs are found on trees in 
winter situated near the base of twigs and buds. (See 
fig. 13.) They are minute, oval, or elliptical shining Fic. 13—Eggs of a 
black objects. During the warm part of the year the ee = 
females produce living young, so that one individual 
may, in a few months, be the parent of a large colony. Many of the 
species secrete a sweetish liquid from two pre-apical tubes or cor- 
nicles. This liquid is known as honey-dew, and attracts other insects, 
especially ants. 
TABLE OF PLANT-LICE. 
A. Plant-lice on the bark or roots: 
With a whitish, woolly, or cottony covering. .....-..------ Schizoneura lanigera. 
immoaTeheOVerMNes 6. -,.0-12-- 5-2 - sees ogee eet Se wa {phis persice-niger. 
B. Plant-lice on the leaves: 
With bluish-white mealy powder; on plum ..-.--.---------- Hyalopterus pruni. 
DmeeOWal MOnNCHOINYS soo. = 50... 2- +. ~ <= 2S eeqnee a = - sete ed Myzus cerasi. 
Green, or faintly reddish; on apple... ------------- Pae ood Iphis mali and A, sorbi. 
