Neuroterus oblongifoliae Nicholls, Stone & Melika, sp. nov.

Diagnosis. Neuroterus oblongifoliae belongs to Kinsey’s subgenus Diplobius. One other species, Neuroterus lamellae Weld, 1957, is known from Arizona that induces galls in the form of integral leaf parenchyma thickenings (Weld 1957b).

Gall. (Fig. 393). An integral leaf gall visible as a 2–3 mm thickening of the leaf lamina, sometimes spanning the whole width of the leaf, more usually on one side of midrib, green underneath, pink or red on upper surface. Multilocular.

Biology. Only a sexual generation is known, which induces leaf galls on Q. oblongifolia. Galls mature in April, adults emerge soon afterwards.

Distribution. USA, Arizona, Santa Catalina Mountains.