During the past summer I noticed that the wasp, Ancistrocerus capra (De Sauss) was frequently to be taken on the Locust Tree (Robinia pseudacacia), so one afternoon about the middle of August I thought I would try to discover what was the attraction. I did not have to wait long for a wasp and soon found one which appeared busy hunting. Many of the leaves on this particular tree had the edges folded over and swollen, the work of some gall maker; she examined these leaves very closely, but I hardly thought that what was in them would be of any use to a wasp the size of capra.

Palpi head, thorax and primaries light brownish ochreous, the latter deepest in color along the basal half of costa. Maculation very indistinct, indicated merely in a shade of color slightly deeper than that of the remainder of the wing; orbicular recumbent, oval, reniform rather small, upright; t. a. line scarcely perceptible, rounded outwardly; t. p. line fairly clear, even, parallel to outer margin to beyond cell, bending inward strongly to base of vein 2, and then perpendicular to inner margin with a slight outward angle in the fold; two pale points on each side of this line on costa and another siimilar one above reniform; traces of a dark submarginal band, most distinct on costa where it forms a slight apical dark blotch; faint broken smoky terminal line; fringes dirty whiite, cut by a darker line near base.

The genus Zaschisonyx Ashmead includes but a single nearctic species, Z. montana (Cresson), of which three forms are recognized in this paper. In all these forms the males are identical, as are also the saws of the females, so that only subspecific or varietal names can be given within the group.

Length 6 mm.; width 2.1 mm. Elongate oval, moderately convex. Black, the legs in parts and antennae brown. Entire body clothed with brownish-yellow hairs.

The larch bark-beetle, Dendroctonus simplex Lec., is a black beetle with reddish elytra, approximately 4.7 mm. in length, with the front convex, the pronotum constricted in front, elytra slightly wider than the pronotum, the striae moderately impressed, the strial punctures small and deep, the elytra sparsely covered with erect hairs, with the pubescence distinct. It is abundant in dying larch throughout the larch areas of Eastern Canada from the Atlantic westward across Manitoba, northern Saskatchewan and northern Alberta.

I have in various earlier papers dealt with species of the genus Ornithoica. In doing so, while endeavoring to elucidate these species, I have succeeded at least in adding my full portion of errors to the existing literature. It is the intention here to call attention to these errors and to correct them as far as may be on he basis of the additional information now available.

Two species of the genus Lispothrips, Reuter have been recognized in Europe and it is interesting now to record two new species, making the first record of this genus in North America.