Caryomyia procumbens Gagne, new species

Hosts: Carya ovata, glabra, laciniosa, tomentosa

Gall (Figs. 94-95): Occasional, found on Eucarya hickories, but not east of the Appalachians, except in New England; usually found singly, attached to vein on lower leaf surface; 4-6 mm in length, horizontal, elongate, straight, narrowing gradually from rounded base to pointed apex; white, green, to tan, with stiff, sparse white hairs not obscuring surface; base of gall with central conical pedicel in shallow, circular indentation; wall firm, brittle, uniformly thin, larval chamber glabrous with longitudinal ridges following gall axis from leaf vein connection to apex. The gall is generally similar to that of C. spinulosa, q.v. for further remarks about similar galls.

Affinities. — See under C. eumaris. [C eumaris: Galls of several other species, C. procumbens, C. recurvata, C. spinulosa, and C. supina, have similar attachments to leaf veins, grow horizontally, are thin-walled but brittle, and have longitudinally ridged larval chambers. Larvae of all are generally similar with narrow but two- toothed spatulas and only four dorsal papillae on each abdominal segment. The adult stage has been reared for only two species of this group, the female for C. eumaris and the male for C. recurvata.]

Range: CT, IL, IN, KY, MS, MO, OH, PA, TN, WV

- Raymond J. Gagne: (2008) The Gall Midges (Diptera: Cecidomyiidae) of Hickories (Juglandaceae: Carya)^©

Reference: https://www.biodiversitylibrary.org/page/38636615#page/66/mode/1up