Caryomyia deflexipili Gagne, new species

Hosts: Carya texana, tomentosa, laciniosa, pallida, ovata

Gall (Figs. 66-67): Occasional, on Eucarya hickories, but not east of the Appalachians, except for New England and on the Georgia Piedmont; single or dispersed, on lower leaf surface between veins; 2.8-3.7 mm in height, spherical with small umbo at apex; green, becoming tan to brown, surface matte, non-sticky, with short, sparse, white, decumbent hairs not obscuring surface; base with small conical pedicel, leaf irregularly exfoliate surrounding base of gall; wall firm, brittle, uniformly thin, enclosing glabrous, longitudinally ridged larval chamber of same shape as gall. This gall is most similar to that of C. glauciglobus (Fig. 68), which, instead of having a sparse covering of deflexed hairs, is naked and covered with a bluish bloom.

Affinities. — In many ways it is most like C. glauciglobus, but adults have not yet been reared for the latter species. Both have similarly-shaped galls but with distinctively different surfaces, that of the present species with short, decumbent hairs, that of C. glauciglobus without hairs and glaucous.

Biological notes. — Pupae exit from the side of the gall in April and May after winter diapause.

Range: AR, CT, GA, IL, IN, KY, ME, MA, MS, MO, NH, NJ, NY, 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/43/mode/1up