174 
BRITISH GALLS 
Homop- 
tera 
n 
f • 
? 
Hymen- 
optera 
Leaf margin folded downwards, scarcely swollen. Aphis 
oval, pale green or yellow, with very short green cornicles. 
Callipterus quercus Kalt. 282 
Buckton, iii., p. 21. Houard, No. 1628. 
Minute swelling on the upper surface of the leaf; a 
rounded depression below, about 1 mm. in diameter. 
Trioza remota Forster 283 
Houard, No. 1312. 
In the bark of the twigs. Little circular pits, 2 mm. in 
diameter, surrounded by an elevated circle of bark, single, 
gregarious or coalescent. May to July. 
Asterodiaspis quercicola Bouche 284 
Syn. Asterolecanium variolosum Rtz., Coccus vario- 
losum Rtz. 
Connold, Oak Galls, pi. 62 ; Plant Galls, fig. 173. 
Houard, No. 1299. 
Rounded swellings in the bark, chiefly of saplings, 
which attain the size of a hen’s egg, and then crack and 
become deeply fissured and cankered, sometimes attain¬ 
ing large dimensions. 
284 a 
Connold, Oak Galls, pis. 65, 66 ; Plant Galls, fig. 167 
Attributed to the fungus Dichaena quercina , but prob¬ 
ably resulting from the attacks of insects. 
Quercus cerris Linn. Turkey Oak. 
Oval gall, not exceeding 5 mm. in height, seated in the 
centre of a bud, surface smooth and shining, yellowish- 
brown or red. Sometimes gregarious, five to six in a bud. 
Imago, March to May, I. According to Beyerinck, the 
alternate generation of the marble gall-causer, Cynips 
Kollari. (Text, Fig. 5.) 
Andricus circulans Mayr. 285 
Connold, Oak Galls, pi. 5. Houard, No. 1840. 
Staminate catkin deformed. A flower is changed into 
a hard urn like structure, 15 mm. high, 10 mm. wide, with 
a wide collar above. Plurilocular. Usually the axis of 
the catkin is greatly swollen, the galls numerous, and 
grouped into a mass attaining 40 mm. in diameter. 
Imago, July, August, I. This gall has not been observed 
in Britain. Cameron, however, captured a female insect 
at Loch Lomond. 
Andricus aestivalis Giraud 286 
Connold, Oak Galls, pi. 5. Houard, No. 1811. 
