The following description is offered of an insect to which I shall have occasion to allude in a forthcoming Bulletin, wherein such descriptive matter would be inappropriate.

Hadronotus mesillæ, n. sp.—♂. Length slightly over 1 mm.; black; coxæ black, legs otherwise rufous. Antennæ dark rufous, arising just above mouth, delicately pubescent; pedicel oval, shining, punctured, conspicuously shorter than the long first flagellar joint; second flagellar joint shorter than the tirst, but fully twice as long as broad; third to fifth joints oval, shorter than the second, the third slightly longer than the following, all longer than broad.

I remember about ten years ago to have taken several large specimens of a Grapta, probably G. interrogationis, but they were lost without being identified. I saw no more of the species until August, 1895, when I took a fine example of the form Fabricii. It proved to be the forerunner of a “wave” of the species, and from that date until frost a number were seen, perhaps in all twenty or more, but all but two of them were of the form Fabricii. This spring I watched the hibernating butterflies closely, hoping to obtain a fertile female and rear a brood of larvæ, but although there were many G. comma and j-album, and a few progue and faunus, on the wing throughout April, I did not observe one interrogationis amongst them. By the middle of May the other species of Grapta had disappeared, or were represented by a few specimens worn almost beyond recognition.

Egg. —Pale green, almost globular; very similar to that of Everyx myron, but smaller. Young larvæ collected at Greenwood Lake, New Jersey, June 25th. Length, 1 mm.

Stage I.—Pale apple-green, with numerous minute white dots and a narrow white subdorsal stripe along each side, beginning at the anterior part of the first segment and running to the base of the caudal horn, which is black, and brown at the base. Length, 9 mm. Moulted June 28th.

The “jumping beetles,” or “flea beetles,” constitute the above subtribe, and are separated from the genuine Galerucini by the fact that the hind thighs are greatly enlarged and thickened for leaping. Most of the species are quite small, though a few are of moderate size for this family, and a considerable number of them are prettily coloured. They are of great importance from an economic standpoint, a number of them being quite injurious. The identification of some of the members of this group is attended with considerable difficulty, yet most of the genera have a peculiar facies, which, once grasped, renders the proper location of additional specimens tolerably certain.

On page 577 of their great work on the Hemiptera, Amyot and Serville describe two species of Ledra. One, L. aurita, the well-known species of Europe, was characterized from specimens collected near Paris. I have specimens of it now before me. Its size, the broad membranous prolongation of the head, the ear-shaped horns on the thorax, together with other details of structure, separate it widely from any other homopterous insect. The other species described, L. perdita, though equally unique in form, was characterized under circumstances which, for such eminent scientists as Amyot and Serville, seem extraordinary. After a three-line description, they remark: “L'exemplaire unique d'après lequel cette espèce a été figurée, ayant été détruit, nous la décrivons d'après la figure.” Unfortunately, the figure, number five on plate II., is very poor. The species is credited to “Amérique septentrionale.”

♂.—Upper surface very much like Cybele; differs from Leto in the lighter shade of the ground colour and the much darker and more extensive basal area. This area is sharply limited at the outer edge and extends to the median row of markings, which on the hind wings are quite obscured by it. The apical region is not so clear as in Leto, the row of round spots in the outer belt continuing of large size up to the costa, and the dark blotch lying just within the upper three spots is very prominent, as in Cybele.

Amblyteles subrufus, Cress.—One ♀ labelled Ich. sequax, received by Mr. Fletcher, appears to belong to this species. It is certainly not sequax.

Amblyteles suturalis, Say.

Amblyteles superbus, Prov.— Thirteen ♀s, including Provancher's type, which Mr. Davis has found to equal suturalis (Can. Ent., Vol. XXVII., p. 287). They are yellower than Ottawa specimens; with sutural bands of abdomen weaker and sometimes wanting.

Protandrena Cockerelli, n. sp.—♀. Length, 12 mm.; shining black. Upper half of clypeus, lower portion of supraclypeal area, and part of side pieces, bright yellow, all forming a band across the face one-half broader than high, and of equal breadth throughout; knees yellow spotted. Head rounded, broader than high, and covered with a short growth of gray hair, longer on cheeks and thickest at bave of antennæ; lower haif of clypeus and two small dots near lower edge of band black, not deeply or closely punctured; antennæ black at base, becoming brown towards the tip; first joint of flagellum not quite as long as the second and third combined; mandibles black; vertex deeply but not very closely punctate.