INSECTS INJURIOUS TO THE MAPLE. Ls 
freddish-gray crescent-shaped spot on the middle of the seventh segment, behind which 
is a pair of low kidney-shaped tubercles, and a pair of dorsal pointed black ones on 
the eleventh; second ring swollen on the sides. Length, crawling, 46™™. Changes 
to a pupa the end of July in rolled leaf, the moth appearing August 10. (Goodell.) 
The moth is large, dull ochre-yellow, and the hind wings are tailed. We have taken 
it resting on red maple leaves in Maine. 
17. Tite AMERICAN SILK-WORM. 
Telea polyphemus Hiibner. 
According to Mr. E. B. Reed, this insect “frequently attacks maples, 
and from the enormous size of the caterpillar and its voracious appetite 
a great deal of damage is often done.” (Report Ontario Ent. Soc. for 
1872, p. 39.) ‘ 
18. THe CreCROPIA CATERPILLAR. 
Platysamia cecropia (Linn). 
This caterpillar, larger than the foregoing, also sometimes occurs on 
5 : : =>) 
Fic. 52.—Caterpillar of the Cecropia silk moth, nat. size.—After Riley. = 
the maple. It is about fcur inches long. and pale green, ornamented 
with large tubercles colored green, blue, yellow, and red. 
19. THE MAPLE SEMI-LOOPER. 
Ophiusa bistriaris (Hiibner). 
Order LEPIDOPTERA; family NocTurip.®. 
Late in July feeding on the silver maple, a brownish gray caterpillar 1.40 inch long, 
with the first pair of prolegs small, the worm having a semi-looping gait. 
When about to go into chrysalis it cuts through a portion of a leaf of 
the tree on which it has fed, and turning it over constructs a snug little 
case, fastening it up closely and carefully with silken threads, and in 
this completes its transformations. After remaining in the pupa state 
about two weeks, the moth appears. (Saunders.) 
The larva is 1.40 inch long, somewhat onisciform. Head medium sized, flatteued, 
bilobed ; color, pale ashen gray with streaks of pale brown appearing under a magni- 
fying lens as a fine network; a dark brown, nearly black, stripe on each side, and a 
few short gray hairsscattered over its surface. Body above brownish-gray, with 
numerous streaks and dotsof palebrown. A double irregular dorsalline ; other broken 
lines composed chiefly of dots, none of them continuous. A subdorsal row of whitish 
dots. On the hinder part of the 12th segment is a’raised crescent-shaped line edged 
8 RIL 
