Euura salicis gemma, n. sp.

On Salix humilis

The lateral bud of a twig, enlarged so as to be twice or thrice as long wide and thick as the natural bud before it begins to expand in the spring, its external surface otherwise en- tirely unchanged both in texture and color. Internally, instead of the normal downy embryo leaves, it contains early in the autumn a homogeneous, grass- green, fleshy matter, which is afterwards gradually consumed by the larva, leaving nothing at last but a mere shell, as thin as paper, and partly filled with excrement. Sometimes, from the egg failing to hatch out, this green fleshy matter remains unaltered till the spring. The gall is monothalamous, sometimes one only on a twig, sometimes two or three or more at irregular intervals, very rarely as many as 3 or 4 formed out of 3 or 4 consecutive buds. Common and not local. Described from 34 specimens. Length .17 — .36 inch; breadth .10 — .17 inch. Analogous to the Cecidomyidous gall 8. cornu Walsh, but very differ- ent in its general aj^earance and in its internal structure.

- BD Walsh: (1866) On the Insects, Coleopterous, Hymenopterous & Dipterous: Inhabiting the Galls of Certain Species of Willow. Pt 2nd and last^©

Reference: https://www.biodiversitylibrary.org/item/24078#page/261/mode/1up