Cincticornia simpla

The oval blister galls on oak produced by this species are so insignificant as rarely to attract the attention of any but those specially interested in the study of insect galls. This species was reared in small numbers from several lots of galls taken on Quercus velutina in MA and also from blister swellings on the leaves of red oak, Quercus rubra, taken in the vicinity of Albany NY.

Gall. An irregularly oval pustulate swelling 5 to 6 mm in diameter and showing equally on both surfaces but with no distinct nipple. The galls are a variable brown in the fall, darker than the normal tissue and occur here and there on the leaf. Apparently the same species produces a slightly green or variable yellowish and red elevation on both surfaces of the leaf some 5 by 7 mm in diameter. Several larvae occur in the cavity beneath.

Cincticornia simpla

An irregularly oval, pustulate swelling showing equally on both leaf surfaces but with no nipple, diameter 5 to 6 mm, on Q rubra, velutina

Cincticornia simpla n. sp.

was reared in April and May, 1909, from an irregularly oval, pustulate swelling, 5 to 6 mm. in diameter, from the leaves of the yellow barked or black oak, Quercus velutina, and also red oak, Q. rubra, taken by Miss Cora H. Clarke at Magnolia, Mass., and also collected in the vicinity of Albany.

Cincticornia simpla Felt.

Flat, inconspicuous galls.
An irregularly oval, pustulate swelling 5 to 6 mm. in diameter showing equally on both surfaces but with no nipple.

Cincticornia simpla

Flattened, pustulate or blister galls
An irregularly oval, pustulate swelling, 5 to 6 mm in diameter, showing equally on both surfaces but with no nipple.

Polystepha simpla

Circular, flat or convex cell between veins
Smooth, flat or convex, thin-walled cell
Flat and inconspicuous or slightly raised blisters
Gall protruding on both surfaces of leaf

Host: Quercus velutina

Distr: MA