170 
BRITISH GALLS 
bears at its apex a red and sticky papilla. Imago, March 
or April, II. Rare in Britain. 
Andricus lucidus Hartig 261 
Syn. Afthilothrix lucida Mayr. 262 
Connold, Oak Galls, pi. 5; Plant Galls, fig. 180. 
Houard, Nos. 1172, 1226. 
Hymen- In a terminal bud. Gall fusiform, about 10 mm. long, 
optera brown, covered with a felt of hairs of the same colour ; its 
walls are woody and but slightly thickened. 1 he hairs 
fall off when the gall arrives at maturity. Imago, Sep¬ 
tember, I. 
Andricus solitarius Fonsc. 263 
Connold, Oak Galls, pi. 15; Plant Galls, fig. 181. 
Houard, No. 1255. 
(b) Aganious Generation only 
On the under surface of a leaf. Scattered. Gall hard, 
rounded, 2 to 3 mm. long, flattened at the poles ; its larger 
axis is parallel to the midrib (or rarely a lateral vein), on 
which it is situated between two little valves, the remains 
of the membrane which enveloped the growth at an early 
stage. Green at first, then yellow, with red spots. Imago, 
October, I. Alternate generation of Neuroterus Aprilinus 
(?). (Plates 1 ., II., IV.) 
Andricus ostreus Giraud 264 
Connold, Oak Galls, pi. 50; Plant Galls, fig. 213. 
Houard, No. 1326. Adler and Straton, Alternating 
Generations, pi. 2, fig. 19. 
In an axillary bud. Gall solitary, elongated, subcylin- 
drical, acorn-shaped, 4 to 5 mm. long, usually with a little 
recurved point at the apex, glabrous, entirely smooth, 
green with whitish bands, giving it a furrowed appearance 
longitudinally. Falls in May. Imago, spring, II., III. ; or 
November, I. 
Andricus albopunctatus Sch. 265 
Connold, Oak Galls, pi. 17, and fig. 7. Cameron con¬ 
siders this insect to be A. quadrilineatus attacking buds. 
Houard, No. 1284. 
On the margin of a leaf. Solitary. Gall pyriform or 
fusiform, 3 to 4 mm. high, 2 to 3 mm. in diameter, green, 
longitudinally marked with red or yellowish-brown stripes. 
Imago, Spring, II. 
Andricus marginalis Adler 266 
Syn. Aphilothrix margi?ialis Schl. 
Connold,, Oak Galls, pi. 24; Plant Galls, fig. 198* 
