Caryomyia purpurea Gagne, new species

Hosts: Carya ovata, texana, glabra, tomentosa

Gall (Figs. 15, 120-122): Common, found on Eucarya hickories; on lower leaf surface, usually found in groups between veins but may occur close to veins; 2.2-3.0 mm in height, spheroidal, occasionally with slight, conical prominence at apex, surface covered with long, thick, mostly dark brown hair obscuring gall surface; base with deep, circular, central excavation, the leaf without exfoliation surrounding connection; wall woody, of even thickness but thicker apically if peak present, green to brown; larval chamber at base of gall ovoid, violet to purple. Exteriorly, the more conical galls are similar to the more short-conical galls of C. holotricha; such galls must be cut open to see whether hairs intrude into the larval chamber from the apex as they do in galls of C. holotricha.

Range: AL, AR, CT, GA, IL, MD, MA, MO, NH, NJ, NY, NC, OH, Ontario, SC, TN, VA, DC

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

Reference: https://www.biodiversitylibrary.org/page/38636615#page/67/mode/1up