Pontania parva

Nematus parvus

Gall. — Length 8 mm.; breadth 6 mm. Of type of desmodioides, but rather smaller and projecting most on lower surface of leaf. In the specimen examined, two occur on the leaf, one on either side of the midrib, and each extends from the latter to the margin of the leaf. Surface, especially lower, tuberculate and rosy. Exit hole of adult on lower side, just at surface of leaf and at end next to petiole.

Ten females. — Nevada 4, California 3, Oregon 2, and Arizona and Montana 1 each. (Coll. Am. Ent. Soc.) Also one specimen collected by T. Kincaid at Olympia, Wash. (Coll. Cornell Univ.) One male from California. (Coll. Am. Ent. Soc.) Galls on willow leaf collected by Mr. Ehrhorn, Mountain View, Cal. Two adults reared, which, with galls, are in collection of William H. Ashmead.

- Charles Lester Marlatt: (1896) Revision of the Nematina of North America, a Sub-family of Leaf-feeding Hymenoptera of the Family Tenthredinidae^©

Reference: https://www.biodiversitylibrary.org/page/52142981#page/106/mode/1up