Caryomyia glauciglobus Gagne, new species

Hosts: Carya tomentosa, ovata, laciniosa, glabra

Gall (Figs. 68-69): Occasional, on Eucarya hickories; single or dispersed on lower leaf surface, between veins; 3.6-4.2 mm in height, spherical with small umbo at apex, green becoming tan to brown, smooth, not sticky, hairless, covered with blue-gray powdery bloom; base with small conical pedicel, leaf with irregular exfoliation around base of gall; wall firm, brittle, uniformly thin, larval chamber glabrous with longitudinal ridges. This gall appears superficially similar to those of C. deflexipili and C. caryae because of their spherical shape without conspicuous hairs. Galls of C. deflexipili have deflexed, fine hair that is detectable with a hand lens, while galls of C. caryae are sticky to the touch and not glaucous.

Affinities. — See under C. deflexipili. [C deflexipili: 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.]

Range: CT, GA, IN, KY, ME, MD, MA, MS, NY, OH, TN, WV

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

Reference: https://www.biodiversitylibrary.org/page/38636615#page/48/mode/1up