i6o 
BRITISH GALLS 
Hymen- 
optera 
? > 
3 3 
covered with minute wart-like projections, amongst which 
the mites swarm in summer. 
Eriophyes avellanae Nal. 218 
Syn. Phytoplus coryli Pers. 
Connold, Veg. Galls, pi. 47; Plant Galls, fig. 133. 
Houard, No. 1056. 
Quercus Robur Linn. 105. British Oak. 
I. Cynipidae with Alternating Generations 
On the male catkin. Gall ovoid, about 2 mm. high, 
taking the place of a stamen, green at first, becoming 
brown. It is covered at the apex with a closely crowded 
mass of white hairs, 6 to 8 mm. long. It appears at the end 
of April. Sometimes all the stamens of a catkin are 
attacked ; the axis of the latter does not develop, and the 
gall then appears as a mass of cottony threads surrounded 
by the bud scales. Imago, June, I. 
Andricus cirratus Adler 219 
Connold, Oak Galls, pi. 14 ; Plant Galls, fig. 220. 
Houard, No. 1185. Adler and Straton, Alternating 
Generations, pi. 2, fig. 11a. 
In an axillary bud. Gall fusiform, with a long stalk ; 
total length 20 mm., yellowish-green, becoming brown, 
marked with more or less pronounced longitudinal ribs. 
First appearing in May. Imago, spring, III. 
Andricus cirratus, form callidoma 220 
Syn. Andricus callidojna Giraud ; Aphilothrix calli¬ 
doma Hartig. 
Connold, Oak Galls, pi. 18; Plant Galls, fig. 184. 
Houard, No. 1254. Adler and Straton, Alternating 
Generations, pi. 2, fig. 11. 
On the leaf; the colour, shape, and size of a pea, 
glabrous above, slightly hairy below, provided with a 
large cavity containing an internal gall. Sometimes on 
the terminal twig. Always causing distortion and bend¬ 
ing of the part attacked. Spring and summer. Imago, 
May and June, I. 221 
Andricus curvator Hartig 222 
Connold, Oak Galls, pis. 6, 7 ; Plant Galls, figs. 169, 195. 
Houard, No. 1351. Adler and Straton, Alternating 
Generations, pi. 1, fig. 9 a. 
In an axillary bud. Gall minute, fusiform, 3 to 4 mm. 
long ; its basal part, together with a small peduncle which 
supports it, is hidden by the bud scales. The apex is 
pointed ; just below the point there is a circular depres- 
