INSECTS INJURIOUS TO THE BUTTERNUT. 87 
rounded, pale whitish, and covered with a snow-white powdery secretion, 
with prominent black eyes. The body is cylindrical, with eight pairs of 
soft fleshy abdominal legs; the segments are transversely wrinkled, pale 
pea-green, with a powdery secretion low down on the sides, but above 
and on the back arise long flattened masses of flocculent matter 
(exactly resembling that produced by the wooly plant lice and 
other homopterous insects), forming an irregular dense cottony 
mass, reaching to a height equal to 
two-thirds the length of the worm, and 
concealing the head and tail. On the 
27th and 28th of July the larve molt- 
ed, leaving the cast skins on the leaf. 
They were then naked, a little thicker 
than before, of a pale-green color, and ads 
Fic. 38.—The butternut wooly worm and the 
their indies were curled upon the leaf. — same deprived of its coat.—From Packard. 
The worms eat out the edge of the leaf. Some time during August 
two cocoons were spun between the leaves, but I did not succeed in 
raising the saw-flies. On describing the larve in a letter to Mr. E. 
Norton, our best authority on this hymenopterous family, he kindly sent 
me alcoholic specimens of the larvee (without the woolly substance, which 
dissolves and disappears in alcohol) found feeding on the hickory, which 
are, apparently, from the comparison of alcoholic specimens, identical 
with the butternut Selandria. The adult fly he named Selandria carya, 
and his descriptions are given below. 
Previously to this and without my knowledge, Dr. Fitch, under the 
name of Selandria? juglandis, had apparently briefly described in his 
third report the same insect, but he was unacquainted with the perfect 
insect, and was in doubt as to whether the larva was a Selandria or not. 
Under these circumstances we retain Mr. Norton’s name. From his 
account it would appear that the insect also feeds on the hickory (Juglans 
Squamosa). 
Female.—Color shining black. The pro and meso-thorax and scutellum rufous, the 
apex of the latter black; the nasus and legs white; with their tarsi blackish; the base 
of cox and a line down the upper side of the legs black. Antenne short; the second 
joint as long as the first; the four final joints together not longer than the two pre- 
ceding. Nasus slightly ineurved. Claws of tarsi apparently bifid. Wings subvio- 
laceous; lanceolate cell petiolate, the first submedian cell above it with a distinct 
eross-vein, Under wings with one submarginal middle cell (all other species have 
this cell discoidal), the marginal cell with a cross-nervure, and all the outer cells 
closed by an outer nervure, which does not touch the margin. The submedian cell 
extended nearly to the margin. Length, 0.25 of aninch. Expanse of wings, 0.40 of 
an inch. 
The male resembles the female, but the under wings are without middle cells. 
The larva feeds upon the leaves of the hickory (Juglans squamosa). They are found 
npon the lower side of the leaf, sometimes fifteen or twenty upon one leaf, which they 
eat from the outer extremity inward, often leaving nothing but the strong midribs. 
They cover themselves wholly with white flocculent tufts, which are rubbed off on 
being touched, leaving a green twenty-two-legged worm, about 0.75 inch in length 
