ON THE COMMON OAK 
i ? 1 
Houard, No. 1347. Adler and Straton, Alternating 
Generations, p. 90. Cameron considers A. marginalis 
to be A . quadrilineatus galling leaves, not a distinct 
species. 
Hymen- On the male catkin. Gall unilocular, ovoid, about 3 mm. 
optera high and 2 mm. in diameter, glabrous, brown, its surface 
marked longitudinally with irregular striae, and terminating 
in a slightly marked umbo. Often abundant, sometimes 
more than thirty on one catkin. 
Andricus quadrilineatus Hartig 267 
Syn. Aphilothrix quadrilineata Hartig. 
Connold, Oak Galls, pi. 13 ; Plant Galls, fig. 225. 
Houard, No. 1201. Adler and Straton, Alternating 
Generations, p. 91. 
On the male catkin. Gall unilocular, fusiform, 3 to 6 mm. 
long, attached to the axis of the catkin usually by a short 
stalk, green, more or less marked with longitudinal striae, 
its extremity marked with a minute umbo encircled by 
hairs more closely set at this point than elsewhere on the 
surface. The stalk of the catkin is much swollen at the 
point where the gall is seated. Imago, spring, II., III. 
Andricus srminationis Adler 268 
Syn. Aphilothrix seminationis Giraud. 
Connold, Oak Galls, pi. 24 ; Plant Galls, fig. 226. 
Houard, No. 1200. Adler and Straton, Alternating 
Generations, p. 87. 
,, On the lower surface of the leaf. Solitary or scattered. 
Gall ovoid, 4 mm. long, at first yellowish white, becoming 
yellowish-brown. Attached by a very short, stout stalk 
to the midrib or a lateral vein. Surface glossy, slightly 
nodular. Imago, October or November, I. 
Dryophanta agama Hartig 269 
Connold, Oak Galls, pi. 40; Plant Galls, fig. 201. 
Houard, No. 1327. 
On the under surface of the leaf. Solitary or scattered. 
Gall spherical, markedly flattened at the poles, 4 to 5 mm. 
high ; there is a slight depression at the upper pole, with a 
wart in the centre, slightly shining, yellow. Firmly 
attached by a small stalk to the midrib or a lateral vein. 
There are two cavities within ; the larva occupies the lower. 
Imago, October or November, I. 
Dryophanta disticha Hartig 270 
Connold, Oak Galls, pi. 41 ; Plant Galls, fig. 202. 
Houard, No. 1329. 
