Sears in his “Insect Galls of Cedar Point (Ohio) and Vicinity,” described my number 5 under this species. Felt, Jour. Econ. Ent. 4:456. 1911. Felt, Bull. Brooklyn Ent. Soc. 8:99. 1913. 7. =Cecidomyia= sp. =Cecidium= nov. On leaf, under side, elongate-conic constricted somewhat at base so as to resemble a miniature lamp chimney. Arises from saucer-like base. 5 mm. in length. Smooth, greenish-yellow to brown. Two chambered, the larval chamber at the proximal end, sub-spherical with a dia. about ⅓ the length of the gall. The distal false chamber large, the walls becoming thin apically. The partition separating the chambers is firm with a minute perforation at its center. Surface of leaf opposite gall not raised. Collected in Hocking County, Ohio, on _H. glabra_, July. Type specimens unaccountably missing. The description is nevertheless presented inasmuch as both it and the drawing were made from fresh material in the field. 8. =Cecidomyia= sp. =Cecidium= nov. On leaf, under side, a gall similar to 7, perhaps a variety of it, though its prominent and constant differences would indicate a distinct species. Conic with rounded base and truncate tip, 4-6 mm. high, 3-4 mm. broad in widest part. The wall at the tip thin, splitting into a fimbriate condition. Attached by a minute central pedicel, no trace of a saucer-shaped structure developing around the base. Galls greenish to red and purple tinted. Uniformly being covered with sparsely distributed short hairs. Interiorly two chambered, the larval chamber proximal and occupying nearly one-half of the gall. Walls including the partition comparatively thin. Surface of leaf opposite gall slightly raised with reddish tint. Collected in Athens County, Ohio, on _H. alba_, August. Type specimens at Ohio State University. 9. =Cecidomyia= sp. =Cecidium= nov. On leaf, under side, elongate conic, asymmetric, the axis lying horizontal or parallel with the leaf blade plane. The tip is invariably strongly recurved upward and backward. The side of the proximal part of the gall lying against the leaf is flattened and rests close against the leaf and vein; the galls always spring from the side of a vein. Size variable from 2 mm. in length to 4 mm. this measurement distally not being made to the tip but merely to that part of the recurved terminal portion, farthest from the base. The larger specimens measure 1½-2 mm. in width at the proximal end. Light green to nearly white, or sometimes roseate tinged. Very smooth. Walls thin distally thickening toward the basal end. Not uncommon on _H. alba_ in Hocking County, Ohio, July. Type specimens at Ohio State University. A gall, somewhat similar and probably a variety of the above was collected on _H. glabra_, (Fig. 9a.)