Andricus indistinctus

Quercus alba
Stem galls, detachable
Small, round, smooth, sessile on small twig. Oct. North Ohio. Entered from lit. Types are a Disholcaspis.

[Photo caption]
On Q alba. The type gall in Philadelphia is globular, slightly wrinkled, dark colored, 4 mm in dia. Adult was nearly mature in Oct. The type and the two others belong in the genus Disholcaspis (unpublished).

Andricus ? indistinctus n. sp.

Small, round galls attached by a broad base to the small twigs of Q. alba. Smooth when fresh, but the dry galls are wrinkled and closely resemble pepper corns. The diameter of fresh galls is about three-sixteenths, while the dry ones are about one-eigth of an inch. They contain no true larval cell, separable from the gall walls, which are thin and of a loose texture. They are monothalamous, and the insects were nearly mature in October when they were gathered and came out before the next spring. Their coming out was probably hastened by the warmth of the room in which they were kept. I found them in north Ohio in 1885; they seem to be extremely rare, I having found them on one occasion only and then only seven or eight individuals.