ORCHARD INJURY BY HICKORY TIGER-MOTH, 38 
seem preferable, since the insect belongs to the family of tiger-moths 
(Arctiidae) and not to the family of tussock moths (Lymantriidae). 
SYNONYMY. 
= Lophocampa caryae Harris, 1841. 
Halesidota annulifacia Walker, 1855. 
Phegoptera porphyrea Herrich-Schiffer, 1855, 
Halisidota caryae (Harris) Grote, 1882. 
Halisidota caryae (Harris) Packard, 1890. 
DISTRIBUTION. 
The hickory tiger-moth is distributed over the northeastern United 
States and the adjacent Canadian Provinces. According to rec- 
ords of the Bureau of Entomology and literature, its range ex- 
tends from the Atlantic Ocean west to Missouri, Minnesota, and 
Saskatchewan, and from the Canadian Provinces bordering the 
United States south to North Carolina and southern Ohio. Records 
have been taken from the following States and Canadian Provinces: 
Maine, New Hampshire, Vermont, Massachusetts, Connecticut, New 
York, Pennsylvania, New Jersey, North Carolina, Ohio, Michigan, 
Illinois, Wisconsin, Missouri, Quebec, Ontario, Manitoba, and Sas- 
katchewan. It is probably much more frequent in New England 
and the Middle States, however, since more than 75 per cent of the 
reports of destructiveness have come from this region, 
DESCRIPTION OF STAGES. 
EGG. 
(Pl. II, fig. 4.) 
The egg is nearly globular, flattened on the side of attachment, 0.75 mm. in 
diameter. The surface is glassy and in color it is a robin’s-egg blue when 
first deposited. A brown ring appears on. the upper surface about the second 
day, and in a few days the egg appears olive brown when viewed from 
above, although when viewed from the side it is greenish. In about two weeks, 
just before hatching, it becomes leaden blue. Infertile eggs do not change 
in color, but dry up in a few weeks. Eggs are deposited in a broad patch of 
50 to 400 on the underside of the leaf. The writer has found one patch of 
525 eggs. 
LARVA. 
° (Pl. I, Pl. H, figs. 1, 2, 3.) 
Full-grown larva.—Length, 32 to 38 mm. A striking grayish-white and 
black hairy caterpillar. It is covered with short spreading tufts of grayish 
white hairs, with a dorsal row of contiguous black tufts which appear like a 
velvety crest. These tufts occur on the first eight abdominal segments and a 
small one may be seen on the ninth. There also may be a pair of slender black 
pencils arising fronr the first abdominal segment, and another pair arising 
from the seventh. These pencils may be very long, may be inconspicuous, or 
absent altogether. The head and fect are black. The hair arising from the 
thoracic segments is ionger than that of the rest of the body and when the 
