578 FIB^TH 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 

 forms (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. 46) : 



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 cyliudiical 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""". 



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 joints. Abdomen purplish fuscous, on a white ground. Expanse of the 

 wings, half an inch (12.5"""). (Chambers.) 



Fig. 193. — WiUow leaf 

 folded by Gracilaria.— 

 Wilder del. 



49. 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 purpuriella, being quite 

 thick, with large flattened setiferoua 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 Lairs along the sides of the body. Length, 



