Dryocosmus quercuspalustris (sexgen)

Bassettia flavipes (sexgen)

Philonix fulvicollis (agamic)

Dryophanta liberaecellulae n. sp. 

Quercus rubra and coccinea

Gall.--Globular excrescences on the leaves of the red and scarlet oaks, sometimes taking into themselves the entire leaf tissue and at others surrounded by the blade of the leaf as is the case of Amphibolips nubilipennis or Andricus singularis, either of which it very much resembles, but from which it differs by having a somewhat roughened and fuzzy exterior and a much thicker outer wall, and by having the larval cell perfectly free to roll about within. The galls vary from 6.5 mm to 9.5 mm in diameter. 

When gathering the galls on May 20, 1889, it was noticed that some of the flies had already escaped, and on May 28th occasional galls could be found with the flies still in them. 

Neuroterus flavipes n. sp.

On bur-oak Quercus macrocarpa

Gall.--A hard woody swelling of the mid-rib or one of the main veins of a leaf, the leaf becoming much wrinkled and deformed as the result. Large galls measure three-fourths of an inch in length and one-fourth of an inch in width. The flies usually escape from the upper surface, sometimes through a slightly raised teat-like projection. 

Galls were gathered at Ames, IO, July 6 1888, from which the flies had already begun to issue.

Acraspis niger, n. sp.

Hosts: Quercus alba

Galls.--Small, brown, globular bodies, densely covered with a grayish pubescence which gives them the appearance of felt on their outer surface, attached to the under surface of the leaves of the white-oak in September and October. Galls exactly similar are very common on the leaves of the bur-oak Quercus macrocarpa, but from these I have not succeeded in rearing the flies. Internally these galls have a fragile central cell surrounded and held in place by a dense growth of dark brown radiating fibres. The galls resemble very closely those in my collection of Acraspis lanaeglobuli Ash. 

Range: MI, IO

New Cynipidae (1890)