1864 .] 
483 
in 0. q. palusiris. Ventral valve” small, siibhyaline, its tip rectangular; the 
ovipositor stouter than usual and projecting, more or less far, from the ven¬ 
tral valve.” Legs all uniformly honey-yellow verging on rufous, except that 
the tarsal tips are obfuscated. Wings hyaline, the principal veins and the 
cross-veins brown but rather fine. Areolet large and distinct. Radial area 
open and 3—3^ times as long as wide. Length 9 -08—*10 inch. 
Five 9 ; S unknown. Came out in June from last year’s galls. Very 
near C. q. palmtris 0. S., but may be distinguished by its shorter and 
slenderer antennae, its opaque and sculptured scutel, and its much finer 
wing-veins. I omitted to label these galls, and cannot therefore be 
certain that they grew on the white oak, but I think they did. Quite 
recently I have found precisely similar galls on the white oak. 
duEST GALL-FLY, Si/nophrus albtpes n. sp. Bred the first week in 
August from last year’s galls, four or five of the insects coming out of 
a single gall. See below. 
5. White oak. dall q. erinacei n. sp. ? {—q.pisum^ Fitch = 
pezomachoides? 0. S.) Attached by a single point to the leaf and 
growing on one of the principal veins, occasionally on the under side 
of the leaf but twice as often on the upper side, a spherical gall .12— 
.45 inch in diameter, or occasionally egg-shaped and .35—.60 inch long 
and .25—.40 inch wide. In a single specimen two spherical galls are 
placed side by side, but in eleven others there is but a single gall on a 
leaf. The surface of this gall is “ finely netted with fissures or cracks 
and intervening elevated points like the surface of a strawberry,” as 
q, pisum is described by Dr. Fitch, but, in addition, in 11 out of 13 
specimens the “elevated points” are prolonged in the form of slender 
prickles, which are occasionally tinged with pink on one side of the 
gall, and are .02—.05 inch long, so as to present a beautiful burr-like 
appearance or something like that of the European hedge-hog, whence 
the specific name. The general color, when dry, is nearly that of the 
dry leaf, but is sometimes browner, sometimes yellower. Bather rare. 
The above were found in February on young white oaks and sap¬ 
lings that had not shed their leaves. The gall q. pisum is said by Dr. 
Fitch to be “ not rare” and “ to grow on the under side of the leaf” 
exclusively, and the same thing is observed by Osten Sacken of the 
leaf that produced his three C. pezomachoides. Almost all of my 
galls when found were perforated by 1—3 holes, each .02—.03 inch 
in diameter, and always located on the surface next the leaf so as to 
