INJURING HICKORY LEAVES. 301 
Saunders (Can. Entom., Feb. 1877, v. 9, p. 32-33) figures and describes tbe imago. 
Grote (Can. Entom., Sept. Id78, v. 10, p. 176) states that this species is double-brooded 
in the Southern United States. 
49. The regal walnut caterpillar. 
atheroma regalis Hiibner. 
Order Lepidoptera ; family Bombycid^e. 
A spiny caterpillar 5 inches long, our largest species, green, with a red head and 
tail, and stout, sharp, black and red spines, and black and red feet; not spinning a 
cocoon, but the larva enters the ground in September to transform to a chrysalis, 
which in July changes to a very large bright orange-red moth, with the fore wings 
pale olive spotted with yellow, the veins stained reddish, and the hind wings orange- 
red. 
This is our largest caterpillar j it is harmless, though so formidable 
in appearance, and easily recognized by its size and by the four long 
horns on the segments just behind the head. It feeds on the black 
walnut, butternut, hickory, persimmon, and sumach, and is very rare 
north of New York, and is scarce in the Middle and Southern States. 
In Georgia it is double-brooded. 
50. (Edemasia eoncinna (Abbot and Smith.) 
According to Abbot and Smith the caterpillar feeds on the honey- 
locust ( Gleditschia triacanthos), apple, persimmon, and hickory, the whole 
brood most commonly together. Its web was formed on the 28th of 
May, and the fly came out June 12th. It likewise spins in the autumn 
and comes out in the spring. It thus appears to be double- brooded in 
the Southern States, but in the Northern States it is single-brooded, and 
usually occurs on the apple, cherry, and plum trees in August and 
September, stripping certain branches of their leaves. 
51. Datana angusii Grote and Robinson. 
I have found the caterpillars of this Datana on the pig-nut hickory 
late in the summer at Providence. The body is very dark, and Abbot 
and Smith in the last century noticed a black Datana larva on the hickory, 
as did Harris (see Harris' Correspondence.) When at rest the head and 
thoracic segment are thrown over the back, and the eighth segment 
and those behind it are also held up at right angles to the middle of 
the body, as usual in other species of the genus. 
Larva. — Head black, body very dark, with four linear greenish-yellow distinct 
lines on each side of the body, with numerous long white hairs, some longer than 
the body is thick, arising from minute black papillse. Thoracic legs black, but the 
third pair Scotch-snuff brown at the base, as are the abdominal legs, except the anal 
pair. Length, 40 mm . 
