On leaf, under side, elongate-conic constricted somewhat at base so as
to resemble a miniature lamp chimney. Arises from saucer-like base. 5
mm. in length. Smooth, greenish-yellow to brown. Two chambered, the
larval chamber at the proximal end, sub-spherical with a dia. about
⅓ the length of the gall. The distal false chamber large, the walls
becoming thin apically. The partition separating the chambers is firm
with a minute perforation at its center. Surface of leaf opposite gall
not raised.
Collected in Hocking County, Ohio, on _H. glabra_, July.
Type specimens unaccountably missing. The description is nevertheless
presented inasmuch as both it and the drawing were made from fresh
material in the field.