The description of this moth on page 7 of this volume was drawn from a single female specimen and that not in good condition. I have this season secured fresh examples of both sexes; from these I note some additions and corrections to the previous account.

Egg—Cylindrical, one half higher than broad, flat at base, tapering very slightly from base to about three fourths the length, then conoidal, the top flattened and a little depressed; marked by 14 vertical ridges, straight, narrow, not very prominent, and extending from base to the middle of the cone ; below the cone are horizontal striæ, which with the ridges enclose long, rectangular spaces ; there are nine tiers of these, each space roundly excavated; above the base of the cone are similar spaces in one tier, but they are higher and more nearly square and more deeply excavated ; next these is a tier of seven cells, irregularly pentagonal; the flattened top is composed of three concentric rows of small spaces, the outer one largest, and this and the next formed of pentagons; the inner row is made of rhomboids with the micropyle in the centre ; color yellow. Duration of this stage 3 days.

429. Plusia rectangula Kirby.—Expansion of wings 1½ inch. Taken in Canada by Dr. Bigsby.

Body cinereous, underneath whiter. Antennæ testaceous ; thorax crested ? as the scales are mostry rubbed off this cannot however be positively asserted; wings incumbent ; primaries with a subcrenate edge ; inclining to ash-colored, clouded with black, with a subramose rectangular somewhat silvery spot, extending from near the base to the middle of the wing; between which and the apex is a narrow white wavy band, edged with black; and still nearer the margin a zigzag transverse black line; the secondary wings are plicatile, cinereous, and dusted at the apex with brown.

Having continued my investigations on Orange Insects, I have made many other discoveries. Among these probably the most interesting is the breeding of two species of Chalcids from the larvæ of Syrphus flies.

Now, as a general rule, the Chalcididæ must be considered beneficial, the majority of them preying upon other insects injurious to the agriculturist, the species belonging to the Eurytomide genus Isosoma, being, I believe, the only vegetable feeders known among them.

In previous numbers of the Can. Ent. (vols. ix, p. 232, and viii, p. 137) I have given an account of a singular larva found in thorns of Gleditschia triacanthos or Honey Locust. I have never succeeded in rearing the imago from the larvæ found in the thorns, but the same larva—or one that I have not been able to distinguish from it—lives also in the pith of the “iron weed” ( Veronia ) and also in that of the “hog weed ” or “horse weed,” Ambrosia trifida ; and in the pith of these stems is also found a Lepidopterous larva which I have not been able to rear to the imago state, but which does not seem to differ from that of Laverna gleditschæella found in the thorns.

The Rev. Mr. Hulst, who has arbitrarily drawn together distinct species of Catocala, as C. crataegi and C. polygama, forgetting that the larva of the former is described.

On the 11th of June I took a pair of Saperda Fayi upon thorn, a rather rare insect with Canadian collectors hitherto, I believe. Ten years ago or more I captured one, and had not met with it since, but this year amidst a general scarcity it seemed to be quite abundant here, the different collectors finding it well represented in every direction around the city.