86 INSECTS INJURIOUS TO FOREST AND SHADE TREES. 
nut color with the sides of its thorax and a band on its wing-covers ash-gray, the 
latter sprinkled over with coarse punctures and large blackish dots, the thorax on 
each side of its disk with a black stripe interrupted in its middle. Length, 0.25 inch. 
Dr. Fitch, in his third report, states that the bark of old trees will 
sometimes be found everywhere filled with these grubs, which in the 
month of June may be seen changed to short thick pale-yellow pup, 
with a few perfect insects that are newly hatched and have not yet left 
the tree. 
2. THE MUSCLE-SHAPED BUTTERNUT BARK-LOUSE. 
Aspidiotus (Mytelapis) juglandis Fitch. 
Order HEMIPTERA; family Coccip2&. 
Fixed to the bark of the twigs, minute pale brownish scales, like those of the apple 
bark-louse, but smaller and not curved; preyed upon by a minute chalcid fly. (Fitch. ) 
3. THE HEMISPHERICAL BUTTERNUT SCALE INSECT. 
Lecanium juglandifex Fitch. 
Adhering to the bark on the under side of the limbs, a hemispherical dull yellowish 
or black scale about 0.22 inch long and 0.18 broad, notched at its hind end, frequently 
showing a paler stripe along its middle and a paler margin and transverse blackish 
bands. (Fitch.) 
The males, according to Fitch, are long and narrow, delicate two- 
winged flies, measuring 0.05 inch to the tip of the abdomen and a third 
more to the ends of the wings. They are of a rusty reddish color, the 
thorax darker and the scutel and head blackish, this last being sepa- 
rated from the body by a narrow pale-red neck. The antenne are 
slender and thread-like, half as long as the body and eight-jointed. 
Two slender white bristles as long as the body are appended to the tip 
of the abdomen. This description will apply to most of the males of 
other species of Lecanium. 
AFFECTING THE LEAVES. 
4. THE BUTTERNUT WOOLY WORM. 
Selandria carye Norton. 
Order HYMENOPTERA; family TENTHREDINID ©. 
On the under side of the leaves companies of saw-fly larvie covered with long dense 
snow-white wool standing up in flattened masses entirely concealing the green worm, 
eating the leaflets from the outer edge inward, often leaving nothing but the mid- 
ribs. 
These remarkable objects occasionally, though rarely, appear on the 
butternut in July. The worm presents the appearance (as described in 
our “Guide to the Study of Insects,” from which the following descrip- 
tion and figures are taken) of an animated white woolly or cottony mass 
nearly an inch long and two-thirds as high. The head of the larva is 
