POPLAR CATERPILLARS. 457 
verse anterior line below the median vein, and a similar streak at internal margin. 
Transverse anterior line dark brown, grayish at costa, undulate, bordered anteriorly 
by a pale buff shade from below subcostal vein to internal margin. Median space 
widest at costa, narrow at internal margin, grayish, with an elongate pale discal 
spot with dark brown center. Transverse posterior line cinereous, indistinct, sub- 
dentate, continued. Terminal space with a series of rich chestnut-brown streaks 
between the veins , two more, linear, near the apex. Posterior wings pale cinereous 
with two indistinct median bands; anal angle touched with brownish. Thorax 
and collar brownish; tegulse grayish; abdomen cinereous, slightly brownish above. 
Under surface of thorax and inside of legs brownish, outside of legs and sides of tho- 
rax clothed with cinereous hairs. Expanse of wings 1.60 inches. (Grote.) 
28. (Edemasia concinna Abbot and Smith. 
The moth has been bred by Mr. Elliott from the willow, and I have 
found it in different stages of growth on the willow at Brunswick, Me., 
in August and September. It also feeds on the aspen and blackberry 
in Maine. I have also found the caterpillar feeding on the huckleberry 
( Vaccinium). 
"This curious and well-known caterpillar was received in August 
from Oregon. Mr. F. S. Matteson, of Aumsville, states that he found 
it in large numbers on a young apple tree, entirely denuding the 
branches of leaves, This mention is made as bearing upon the geo- 
graphical distribution of the species. The gregarious habits of these 
larvae when first hatched admit of an easy remedy in hand-picking." 
(Kiley, Rep., 1884.) 
Mrs. Anna K. Dimmock gives a summary of its history (Psyche, iv, 
p. 282) as follows : 
Notodon ta concinna Abb. and Smith (Nat. Hist. Lepid. Ins. Ga., 1797, v. 2, p. 169, 
pi. 85). Harris (Rept. Ins. Injur. Veg., 1841, pp. 307-309) describes larva and imago 
of this species, and gives as food-plants apple, cherry, plum, Rosa and Crataegus; this 
description is quoted by Morris (Synop. Lepid. N. A., 1862, p. 242), and is repeated 
with figures of larva and imago (Treatise on Ins. Injur. Veg., 1862, pp. 425, 426, pi. 6, 
fig. 11) and with a colored figure of the larva by Harris (Entom. Corresp., 1869, ,p. 
303, pi. 1, fig. 3). Riley (Amer. Entom., September and October, 1869, v. 2, p. 27) 
figures larva, pupa, and imago, and adds pear to the food-plants; Riley's figures are 
repeated by Saunders (Can. Entom., July 1881, v. 13, pp. 138-140). The larva also 
eats Betula alba. 
Larva after first molt.— Length 7 mm , body rather slender; head reddish black, 
with two long vertical tubercles; body reddish amber, with indistinct broken yellow 
lines; two long dorsal tubercles on first and fourth segments, much longer than 
those on the outer segments, the tubercles not so conspicuous as in the next stage. 
August 14. 
Larva after second molt. — Body bright yellow; head jet black with two tubercles 
on the vertex; second segment with a jet-black transverse mark. Each of the other 
segments has a transverse row of eight or ten small black short tubercles, those of 
the dorsal region being the longest. Between these are a few whitish hairs. Anal 
segment, thoracic and abdominal feet pitchy dark. Length 12 mra . 
After the second molt some of the larvae are ichneumoned. September 2 an ichneu- 
mon larva had issued from the ventral side of the caterpillar and spun a white thin 
cocoon ; the nearly dead caterpillar was fastened by its back to the cocoon. After 
