Insects of Shade Trees and Their Control. 81 
MAGNOLIA SOFT SCALE.™ 
The magnolia soft scale, as its name indicates, occurs primarily on 
magnolias, although occasionally on tulip trees. Its appearance, 
effects, and habits are similar to those of the species infesting the 
tulip and so also are the 
measures for its control. 
TERRAPIN SCALE.” 
How injurious.—Maple, 
especially sugar maple, 
and sycamore and poplar, 
among shade trees, are 
particularly subject to in- 
festation by the terrapin 
scale, which occurs in sev- 
eral States west of the 
Mississippi River, and in 
all of those east of it. It 
is largely a twig scale. 
How recognized.—In- 
fested twigs show the 
drain from which they 
are suffering by their 
wilting and dying foli- 
age. The twigs are more 
or less heavily incrusted 
with raised reddish scales 
(fig. 57) about one-six- 
teenth to one-eighth inch 
long, about half as much 
in diameter, and ridged 
along the edges. Green 
shoots and the large veins 
of leaves are beset with Fic. 57.—Terrapin scale. Adult females on twig of 
young. licelike insects peach. Enlarged about three times. (Sanders.) 
from midsummer on. Honeydew and black sootlike growth occur on 
and beneath infested twigs. 
Habits—In a half-grown condition the insect passes the winter on 
the bark of twigs and branches of its host, resuming feeding and 
growth as soon as spring starts. Toward the end of May, in the 
latitude of Washington, D. C., they are full grown and the females 
are filled with eggs, the young beginning to hatch about the middle 
 Neolecanium cornuparvum ‘Thro, 5 Lecanium nigrofasciatum Perg. 
° € 
5692°—21 6 
