Caryomyia subulata Gagne, new species

Hosts: Carya ovata, laciniosa, tomentosa, texana

Gall (Figs. 27, 72-73): Occasional, on Eucarya hickories but not east of Appalachian Mts; usually in scattered groups, on lower leaf surface between veins; length 6.0-9.0 mm, elongate-cylindrical, erect, slightly bowed, tapered to pointed apex; shiny, brown, becoming black; base of gall deeply recessed, and set into socket formed from thick, scabrous, leaf growth with sharp apical edge; larval chamber occupying full length of gall, green, longitudinally striated, the wall firm, brittle, uniformly thin. This gall superficially resembles that of C. tubicola but the apex of the present gall is tapered rather than blunt and its base is deeply recessed rather than conical.

Affinities. — The closest relative of this species is not apparent. The spatula with its two widely separated teeth but long, narrow shaft is unique for the genus. The elongate gall set into a deep socket only superficially resembles that of C. tubicola (Figs. 75-77). Notable differences are that the gall of C. subulata is spinelike, completely hollow within, and has a deeply excavated base, whereas the gall of C. tubicola is evenly cylindrical, has some woody tissue within, and has a conical base.

Range: AR, CT, IL, IN, KY, ME, MA, MS, NH, NJ, NY, OH, Ontario, PA, TN, WV

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

Reference: https://www.biodiversitylibrary.org/page/38636615#page/79/mode/1up