BRITISH GALLS 
j 56 
Diptera Fusiform elongated swelling, 10 mm. long, on the mid¬ 
rib or on a lateral vein, green or violet, containing three 
or four larvae, which are white at first, then bright red. 
Metamorphosis takes place outside the gall on the dried- 
up leaf. 
Massalongia rubra Kieff. 193 
Connold, Plant Galls, fig. 62 (without name). Swanton, 
Knowledge, June, 1910. Houard, No. 1075. 
,, Catkin deformed and dwarfed. 
(?) Oligotrophus betulae Winn. 194 
Syn. Cecidomyia betulae Wtz. 
Connold, Veg. Galls, pi. 120; Plant Galls, fig. 64. 
Binnie, 1877, p. 182. Houard, No. 1068 (without name). 
Acari On the under surface of the leaf, usually in the axils of 
the nervures, in a depression corresponding with a more 
or less circular swelling (2 mm. high) on the upper surface, 
a mass of cylindrical contorted hairs. Reddish-brown 
above, the pubescence reddish. Phyllerium tortulosinn 
Greville. 
Eriophyes lionotus Nalepa 195 
Connold, Veg. Galls, pi. 55; Plant Galls, fig. 60. Houard, 
No. 1081. 
,, Bud swollen, up to 10 mm. in diameter, with more or 
less imbricated and recurved scales. The branch below 
the terminal gall is always thickened, and often quite 
arrested in development ; if its growth is continued the 
internodes are usually shortened; ultimately a “witch’s 
broom ” results. Axillary buds are also attacked. Felt¬ 
like patches of white or reddish hairs on the leaf (usually 
below) are caused by the same agency. (Plate XX.) 196 
Eriophyes rudis Canest. 197 
Connold, Veg. Galls, pis. 16-20, 63 ; Plant Galls, fig. 59. 
Houard, Nos. 1072, 1085. 
,, Irregular rounded swelling on the upper surface of the 
leaf, usually between the veins, covered with a rough 
yellow, brown, or red felt. The corresponding depression 
below filled with a mass of white club-shaped hairs. 
Solitary, gregarious, or coalescent. June to October. 
Eriophyes rudis Can., var. longisetosa Nal. 198 
Connold, Plant Galls, fig. 61. Houard, No. 1083. 
,, Numerous buds, slightly hairy, massed together on a 
more or less circular woody boss of variable size on the 
stem and larger branches. 
Eriophyes sp. 199 
Connold, Plant Galls, fig. 57. Houard, No. 1073. 
