INSECTS INJURING OAK LEAVES. 133 
slightly barbed, the barbules short. The tubercles are dirty-white, concolorous with 
the rest of the body. Length, 13 mm . 
Moth.— A small frail form, withciliate antennae, no ocelli, and long dependent palpi, 
their second joint thickly scaled. Fore wings grayish- white, with the inner line black, 
fine, angulated. Outer line denticulate, followed by a pure white shade. A pure 
white shade in the place of the subterminal. Hind wings dusty white. Beneath, 
the fore wings are pale fuscous, immaculate ; hind wings whitish, with a discal dot. 
Expanse of wings, 16 mm . (Grote, Can. Ent., vn, 221.) 
182. Seirarctia echo (Abbot and Smith). 
This is a southern moth, whose caterpillar lives on the ground oak, 
persimmon, and several other kinds of trees. u It formed its web May 
31; one came out the 23d of August, but the rest remained in chrysalis 
till the 14th of April. It is a rare species." (Abbot.) 
The moth is white, the veins edged with black, while the abdomen is 
spotted with yellowish and black. 
183. The oak tussock caterpillar. 
Halesidota maculata Harris. 
Order Lepidoptera ; family Bombycid^e. 
It may be found feeding in September, being a black, very hairy 
caterpillar, with yellow and black tufts and yellow on the sides of the 
body. The worm spins late in September a yellowish-gray oval cocoon, 
constructed of silk, with the hairs of the caterpillar interwoven. The 
moth appears the first week in June. 
Found feeding on oak, London, Ont., July, 1870. Body black, thickly covered with 
bright yellow and black hairs. There is a dorsal row of black tufts from the fifth to 
the twelfth segment. Those on the fifth, eleventh, and twelfth are largest. Seg- 
ments 5 and 12 have an extra substigmatal one each side. 
The same insect was found August 19, 1875, feeding on willow, at Detroit, Mich. 
(Riley's unpublished notes.) 
The larva. — Cylindrical ; 1.30 inch long. Head large, slightly bilobed; black, with 
a faint white streak down the front as far as the middle, where it becomes forked. 
Body above black, thickly covered with tufts of bright yellow and black hairs. On 
the second, third, and fourth segments the hairs are mixed, yellow and black, those 
of the second and third segments overhanging the head. From the. fourth to the 
eleventh segments, inclusive, is a dorsal row of black tufts, the largest of which are 
on the tenth and eleventh segments ; the fourth and eleventh segments have also a 
black tuft on each side near the base. The hairs on the sides of the body, from the 
fifth to the tenth segments, inclusive, are all bright yellow, while those on the sides 
of the twelfth and thirteenth are mixed with black. On the third, fourth, eleventh, 
and twelfth segments are a few long, spreading yellow hairs, much longer than those 
elsewhere. (Saunders.) 
The moth. — Light ocher-yellow, with large irregular light-brown spots on the fore 
wings, arranged almost in transverse bands. It expands nearly an inch and three- 
quarters. (Harris.) 
184. Halisidota edtvardsii Packard. 
A Californian species ; the caterpillar is abundant on various species 
of oaks, in the neighborhood of San Francisco. The larva, says Mr. 
