appearance, and is about one-quarter of an inch long, with a white face, large reddish 

 eyes, a dark hairy body, with four, more or less distinct, dark lines down the thorax, and 

 patches of a greyish shade along the sides of the abdomen. We have reared several 

 specimens of this fly from the lar/a of Eudryas grata during the past season. Their mode 



of procedure is as follows : — The parent fly deposits her 

 eggs on the back of the caterpillar, usually a short distance 

 behind the head, where they are cemented firmly by means 

 of a peculiar secretion with which the insect is furnished. 

 Three or four of these eggs are usually placed upon a single 

 caterpillar, where, after a few daj s, they hatch, and the tiny 

 grub eats its way through the skin into the interior of the 

 body, whlere it feeds upon the fatty matters, avoiding the 

 vital organs which are essential to the continuance of the 

 Fig. 40. life of its victim. When the caterpillar is about full-grown 



it dies, and from its body proceed these three or four full- 

 grown whitish grubs, which, soon after their escape, change to chrysalids. These are nearly 

 one-fifth of an inch long, oval, smooth, and of a dark brown color. 



This friendly parasite materially assists in keeping down the numbers of these and 

 several other kinds of caterpillars, which would otherwise be a source of much greater 

 annoyance to the fruit grower. 



Eudryas grata is generally common throughout both the Provinces of Ontario and 

 Quebec. Mr. G-. J. Bowles, of Quebec, says that it is not uncommon there, and that the 

 larva feeds on the hop, appearing in June and July. We believe this fact of its feeding 

 on the hop has never been noticed before. Rev. L. Provancher, editor of Le Naturaliste 

 Ganadien, Quebec, also speaks of it as abundant, sometimes so numerous as to be quite 

 destructive to the foliage of the vines. Mr. D. W. Eeadle, of St. Catharines, says it may 

 generally be found every season on his grounds, but not in sufficient, quantity to do much 

 harm. Mr. J. Petit, of Grimsby, bears similar testimony as to its presence there. On 

 our own vines we have found them, especially during the past season, quite numerous, so 

 much so that where they were disregarded they soon materially disfigured and damaged 

 the vines. As remedies, we would suggest hand-picking and syringing the vines with 

 hellebore and water. 



No. 3. — The Pearl "Wood Nymph (Eudryas unio, Hubner). This is a near relative 

 of "grata" the beautiful Wood Nymph, indeed, so nearly do they resemble one another 

 that it requires the practised eye of an Entomologist to distinguish between them. This 

 moth, however, is a little smaller, its wings expanding about one inch and three- eighths, 

 and also differs in the following points : — On the fore wings, the brownish purple stripe 

 on the front margin is extended further along the wing, the bordering of the outer 

 margin is paler and more uniform in width, the inner edge wavy instead of straight, and 

 the bordering of the hinder margin is wider and more distinct. The edging of the hind 

 wings is much paler, and extends the whole length of the outer margin. 



With us this insect is much less common than grata, and we have no personal 

 acquaintance with its larval history, but it is said to resemble its relative in this state 

 almost as closely as in the perfect one. Mr. Riley says " it never grows to be quite 

 as large as the other, and may be readily distinguished by its more decided bluish cast, 

 by having but four light and four dark stripes to each segment, by having no orange band 

 across the middle segments, and by the spots, with the exception of two on the back, 

 placed in the middle light band, being almost obsolete. The head-shield on the first seg- 

 ment, hump on the 11th, and a band on the 12fch, are orange, spotted with black ; venter 

 orange, becoming dusky towards the head, feet and legs also orange, with blackish 

 extremities, and with spots on their outside at base." 



"The worm works for the most part in. the terminal buds of the vine, drawing the 

 leaves together by a weak silken thread, and cankering them. It forms a simple earthen 

 cocoon, or frequently bores into a piece of old wood, and changes to chrysalis, which 

 averages but .036 inch in length. This chrysalis is reddish brown, covered on the back 

 with rows of very minute teeth, with the tip of the abdomen truncated, and terminating 

 above in a thick blunt spine on each side. 



