INSECTS INJURING OAK- LEAVES. 171 
In third stage. — Much as before, but tbe markings more distinct. 
In fourth stage.— Color above and below on segments, one-third dull purple, tinged 
with green dorsally. Below light greenish ; a patch of purplish in the substigmatal 
region of each segment. Dorsal line with a bluish tinge. Head light brown. Length 
16 mm . 
Fifth stage. —Marked as before but less distinctly. Colors duller and darker. Length 
2^ mm 
Sixth stage, mature larva. — Dull blackish with a slight bluish-green tinge and late- 
ral dull purplish shades, obscurely mottled. Dorsal streak indistinct, bluish white, 
somewhat irregular. Subdorsal lines broken, but tolerably distinct, the superior 
edged with blackish. Lateral streak white with a bluish tinge. Stigmata black. 
Setiferous tubercles minute, black, ringed with bluish white; those below the lateral 
line more distinct. The superior subdorsal line cuts the frontal plate of segment 1 
very clearly, and is there tinged with yellowish. Rather stout, slightly tapering. 
Length 35 mm . (Thaxter. ) 
Moth. — This species is of the color of S. walkeri, but differs at once by the even, pale 
shaded distinct median lines on the fore wings, which latter are of a rusty olivaceous 
ocherous. The reniform appears merely as a pale luniform mark, looking of a piece 
with the t. p. line. This latter in S. tcalkeri is dark, single, narrow, irregular or 
wavy, or a little interspaceally notched over the median nervules. Hind wings 
blackish, with fringes like the fore wings and thorax in color. Beneath like the fore 
wings above, irrorate with black scales, with distinct blackish discal spot and median 
baud, the latter centrally more deeply indented than usual. Costal edge of primaries 
straight. Expanse of wings, 3d mm . (Grote.) 
231. Amphipyra pyramidoides Guen. 
Professor Riley fouud, May 28, L873, the larva of this common moth 
almost full-grown on the oak. It entered the ground June 5, and 
issued as an imago June 25. He states that it feeds on oak, poplar, 
grape, Cercis canadensis, persimmon, and hazel. 
Saunders states that it also occurs on the thorn, and that when full- 
grown the caterpillar descends to the ground, and, drawing together 
some loose fallen leaves or other rubbish, spins a slight cocoon within 
which it changes to a dark-brown chrysalis, from which the perfect 
insect escapes in the latter part of July. 
Larva. — Nearly an inch and a half long, the 
body tapering towards the front, and thick- 
ened behind. The head is rather small, of 
a whitish-green color, with the mandibles 
tipped with black; the body whitish-green, a 
little darker on the sides, with a white stripe 
down the back, a little broken between the 
segments or rings, and widening behind. 
There is a bright-yellow stripe on each side 
close to the under surface, which is most dis- Fig. 59.— Imago of Amphipyra pyramidoi- 
tinct on the hinder segments, aud a second des.— After Riley, 
one of the same color, but fainter, half-way 
between this and the dorsal line; this latter is more distinct on the posterior portion 
of the body, and follows the peculiar prominence on the twelfth segment. The under 
side of the body is pale green. (Saunders.) 
Moth. — The fore wings are dark brown shaded with paler brown and with dots 
and wavy lines of dull white; the hind wings are reddish with a coppery luster, 
