Hymen- 
optera 
99 
5 > 
ON THE COMMON OAK 165 
On buds on the bark of the lower part of the trunk, 
and on small twigs and branches growing therefrom. 
Gall rounded, 5 to 7 mm. in diameter, with a minute apical 
point ; surface smooth and shining, white, becoming a 
beautiful reddish-pink, soft and juicy within. There is 
no internal gall. Imago, May and June, I. These galls 
are usually gregarious. 
Trigonaspis MEGAPTERA Panzer 240 
Syn. Trigo?-iasftis crustalis Hartig. 
Connold, Oak Galls, pis. 58, 69; Plant Galls, figs. 168, 
175. Houard, No. 1280. Adler and Straton, Alternating 
Generations, pi. 2, fig. iSa. 
On the lower surface of the leaf, attached to a vein by a 
short slender sta’k; gall kidney-shaped, average length 
3 mm., at first pale green or yellowish, becoming more or 
less tinted with red. Imago, spring, III. 
Trigonaspis megaptera, form renum 241 
Syn. Trigo?iaspis renum Giraud ; Biorrhiza renum 
Hartig. 
Connold, Oak Galls, pi. 34 ; Plant Galls, fig. 199. 
Houard, No. 1343. Adler and Straton, Alternating 
Generations, pi. 2, fig. 18. 
Gall formed at the extremity of the terminal part of a 
lateral leaf-vein, the growth of which is arrested, and the 
leaf in consequence is often segmented to the midrib at 
that part. The gall is minute (2 mm. long), soft, fleshy, 
and yellowish-white. Imago, May, I. (Plate V. 8, d.) 
Neuroterus albipes Schrenck 242 
Syn. Spat he gas ter albipes Schr. 
Connold, Oak Galls, pi. 51 ; Plant Galls, fig. 214. 
Houard, No. 1346. Adler and Straton, Alternating 
Generations, pi. 1, fig. 2 a. 
On the lower surface of the leaf, and attached to it by a 
small point, a rounded gall, 3 to 5 mm. in diameter, plane 
or concave, whitish or brownish on its lower surface, with 
minute central umbo on the upper, which is dull red or 
veined with red. The gall is either quite glabrous at maturity, 
or has a few short hairs on the margin of the upper sur¬ 
face. Usually gregarious. Imago, March, 11 . (Plate V. 9,/.) 
Neuroterus albipes, form laeviusculus 243 
Syn. Neuroterus laeviusculus Schrenck. 
Connold, Oak Galls, pi. 47; Plant Galls, fig. 208. 
Houard, No. 1332. Adler and Straton, Alternating 
Generations, pi. 1, fig. 2. 
On the male catkin, a rounded gall about 5 mm. in 
diameter, juicy, reddish, when numerous causing the 
