578 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
He states (Canadian Entomologist, iv, p. 28) that " the larva mines the 
leaves of the willow (Salix longifolia) for a very short time; then, leav- 
ing the mine it rolls the leaves from the tip upwards into various 
forma (usually a cone or helix of three spirals). 
* * * It frequently leaves one roll and makes 
another, and, when ready to pupate, makes a 
dense, semi-transparent web over it, upon the 
ground, not on the leaf, as in many species. The 
imago emerges in the fall, and most probably 
hibernates." He again remarks (1. c, v. 4G) : 
The cone sometimes occupies an entire leaf; the apex of 
the leaf is bent over, so that the left edge touches the right 
one, to which it is fastened ; then the leaf is rolled spi- 
rally to the base, and the tip is used to close one end and the 
base the other, so that the whole leaf is utilized. Many of 
the mines, however, are by no means so perfect. 
Chambers has also bred it from larvae feeding 
on the silver-leaf poplar, but, though not occurring 
on the weeping willow, it is common enough on 
many of our native willows. 
Larva. — Body of the usual cylindrical shape ; no cervical 
shield. Head small, considerably narrower than the pro- 
thoracic segment. Head and body uniformly greenish yel- 
low. Only four pairs of abdominal legs, and these, with 
the thoracic feet, are of the same color as the body. Length, 
6 to 7 mm . 
Pupa. — Very long and slender, so delicate as to scarcely 
retain its shape when the moth has left it. 
Moth. — Violaceous, reddish, or brownish purple, accord- 
ing to the light. Face pale violaceous, flecked with brown- 
ish purple. Antennae brown, tinged with purplish, faintly 
annulate with white at the base of each joint ; palpi pale 
purplish. The triangular white spot at about the middle of the costa is nearly 
equilateral : its anterior margin is a little concave, the apex reaching the fold, and it 
has four small spots of the general hue situated in it upon the costa. Fringe bluish 
fuscous. Posterior femora white at the tip and with a white band around the mid- 
dle, and their under surface entirely white. Posterior tibiae and inner surface of 
intermediate tibiae white. Tarsi pale grayish fuscous, faintly annulate, with white 
at the joiuts. Abdomen purplish fuscous, on a white ground. Expanse of the 
wings, half an inch (12.5 mm ). (Chambers.) 
Fig. 193. -Willow leaf 
folded by Gracilaria.— 
Wilder del 
41). Tineid larva. 
This larva is common on the willow at Brunswick, late in August, 
fastening the leaves together. 
Larva.— Body a little thicker than that of Gracilaria purpurieUa, being quite 
thick, with large flattened setiferous tubercles, four in a line across the thoracic 
segments, and two large ones on the abdominal segments. Head small, very dark 
amber-colored; prothoracic shield black-brown. Body dull olive green ; supra-anal 
plate and anal legs darker. Long pale hairs along the sides of the body. Length, 
