Cecidomyia? venae, n.s.
An irregularly oval fleshy gall on midribs or chief veins, above or below, opening by a slit on opposite side, retaining marks of vein along length; contracted towards ends so running out to substance of vein. 5-8 mm long. Color yellow, sometimes with red tinge. Slightly to densely pubescent. June and later. Several on one leaf. Two or more larvae in a cell. On thorn, Crataegus.

- FA Stebbins: (1910) Insect galls of Springfield, Massachusetts, and vicinity^©

Reference: https://www.biodiversitylibrary.org/item/71437#page/43/mode/1up