532 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
a turned-down portion of the Leaf. It weaves its cocoon, which is 
reddish brown, during the latter part of the month. 
Larva. — The larva is dirty greenish, with four black dots on the head and four on 
the dorsum of the second segment. (Clemens.) 
The following insects also occur on this tree: 
Order Lepidoptera. 
3. Telea polyphemus (Cram.). 
4. Platysamia cecropia (Linn.). 
Order Coleoptera. 
5. Galeruca vittata (Fabr). Squash beetle. Maine in April and May. 
INSECTS AFFECTING THE WILD THORN. 
Cratccgus tomentosa, etc. 
AFFECTING THE LEAVES. 
1. Catocala cratcegi Saunders. 
The caterpillar occur in Canada on the thorn in June. 
Larva. — Head flat, medium sized, slighty hairy, grayish, with a few blackish streaks 
and dots ; bilobed, each lobe tipped with reddish, mixed with white ; these colors mar- 
gined before and behind with blackish brown, in which are dots of a paler hue ; sides 
of head pale greenish white, with a faint net-work of brownish lines. Body above 
greenish ash color, with many minute dots of brownish black, some of them forming 
indistinct and imperfect lateral streaks; dorsal line very slightly paler than the gen- 
eral color. Second and terminal segments with a number of small whitish dots, each 
emitting a single hair. On each side of the dorsal line is a row of small tubercles, 
those on the third segment whitish tipped with black, on fourth reddish tipped with 
dull white; on the remaining segments they are a little larger and decidedly red 
tipped with whitish. Between each of these, and running in the same direction, is a 
small whitish dot or minute tubercle; each and all of these tubercles emit a single 
brownish hair. The upper portion of the niuth segment is raised, and on its center 
there arises a thick, fleshy horn about one-tenth of an inch long, slightly curved back- 
wards, of a dull dark reddish color, thickly dotted with black about the base. The 
usual dark patch on ninth and tenth segments is wanting, except close to the under 
surface, where it is faintly visible. Twefth segment scarcely raised, with no black 
streak behind, but having a faint line formed by a row of black dots extending ob- 
liquely down the sides towards the front. Terminal segment flattened ; lateral fringe 
of a decided rosy pink hue; spiracles whitish, encircled with black. Body beneath 
whitish-green, with a tinge of blue; a central row of brownish-black spots larger 
and deeper in color on seventh and eighth segments, decidedly paler on second, third, 
and fourth, and of a reddish-brown on segments from ninth to thirteenth inclusive. 
Feet pale greenish, faintly marked with brown; prolegs bluish green, hinder three 
pairs streaked and dotted with black. 
Occasionally specimens not full-grown have been met with of a darker shade arising 
from their being more thickly dotted with black ; iu these the tubercles have been 
less decidedly red, while the fleshy horn approached the general color, but was 
thickly covered with blackish dots. Length about 1^ inches (Saunders). 
