Parallelodiplosis florida [an inquiline]

Elongate, pocketlike swellings along the midrib of round-leaved scrub oak, length 5 mm.

Cecidomyia oruca

Elongate fold gall close to the midrib on the under surface, length 12 mm, diameter 1 mm, on Quercus, possibly identical with the preceding.

Cecidomyia q-oruca Walsh.

An elongate fold gall close to the midrib on the under surface length 12 mm., diameter 1 mm. ; on Quercus tinctoria [velutina].

Clinodiplosis florida [an inquiline]

Vein galls
Elongate, pocket-like swellings along midrib of round-leaved scrub oak [Quercus ilicifolia?]

Cecidomyia oruca

Vein galls
An elongate fold gall close to the midrib on the under surface, length 12 mm; diameter 1 mm, on Quercus tinctoria [velutina]

Fig. 20. Quercus velutina affected by the gall-gnat Cecidomyia oruca Walsh (?) in company with an undetermined mite. Felt, Journ. Ec. Ent. IV:467.

Leaf-gall, evident as a fold snug alongside veins on under surface. Pouches isolated at times, but usually confluent and present in great numbers. Brownish opening on upper surface, resembling swollen lips of a knife-cut. In southern Ohio I have seen every leaf on a good-sized tree dying from this gall, as early as June. (The figure shows what are doubtless galls of Cecidomyia foliora Russ. & Hook., evident as infoldings of the edge.)

Cecidomyia q-oruca Walsh [Gagne's World Catalog lists this citation as the original description of the species even though it was listed by Felt in 1910 and presumably described prior to that by Walsh]

An elongate fold gall close to the midrib, some 12 mm long, 1 mm wide, irregularly annulate and containing white larvae, occurs on Quercus tinctoria [velutina] and is labeled as this species in the Museum of Comparative Zoology, Cambridge MA.

Macrodiplosis qoruca

Leaf fold, always with a slit-like opening
Leaf folded along or between veins
Regular, narrow, thick-walled, more or less annulate vein fold
Vein fold parallel sided, smooth, usually longer than 1 cm

Host: Quercus sp.

Distr: IL