86 BRITISH OAK GALLS. 
Aphilothrix globuli, Hartig. 
(Plate XXIII, div. C.) 
Cynips globuli, Hartig, Schenck., Kirch.; Aphilothriz globuli, 
Mayr, Licht., Adler, Fitch; Andricus globuli, Mayr, Cameron, 
Mosley. 
English name of gall.—‘ The Globular Gall.” 
Position of gall.—In lateral and terminal buds. 
Manner of growth.—Sessile, solitary, glabrous, globular, oblate. 
Colours.—Pale green, green, greenish-brown, bluish. 
Average dimensions of a mature specimen. —Globular ; 
girth, 12 mm. 
May be sought during the months of September to November, 
and occasionally in December. 
Growth is complete by the end of October. 
The typical condition of the gall is unilocular and unilarval: 
The larva pupates in the gall. The imago emerges during 
April of the second year. 
Parasites, Nos. 14, 38, 44, 56, 113, 118. Inquilines, Nos. 1, 
138, 138, 145. 
Alternate sexual generation: Andricus injlator, Hartig. : 
A favourite situation for these galls is on the long 
and slender twigs which so often grow from the bole 
of an old oak situated in a more or less open wood. I 
have seen scores of such twigs with from one to eight 
galls in terminal and axillary positions. 
Small bushes near the bole of the tree, or more 
generally those just beyond the limits of the lower 
branches, will also frequently yield numerous speci- 
mens, while the small twigs of the branches themselves 
will often have galls. 
This is one of the late autumn galls, specimens fre- 
quently being seen in sitw during November and occa- 
sionally in December. It is a pretty little gall, mostly 
oblate in shape; this, however, is not apparent until 
it is mature and divested of the outer rind. Many 
specimens are quite spherical. It is formed in a bud 
and bursts through the leaf-scales during October. 
For a short time only a small portion of the growing 
gall can be seen, but ultimately about two thirds of 
