94, BRITISH OAK GALLS. 
with pink or red, lasting for some time, then deepening 
to brown; upon the trunk it is mostly reddish-brown 
throughout the whole of its growth, changing at last 
to chocolate brown. 
The largest specimen of this gall of which I have 
any record was composed of five sections, forming an 
oblong-obvate outline and ob-compressed, and attained a 
girth of 82 cm. It grew on the short stump of a very 
old oak tree in a wood near Hastings. I visited the 
spot intermittingly during a period of twenty-five 
months to note its growth, and then, as hundreds of 
imagines had left it and there were signs of approach- 
ing decay, I removed it for further examination. 
Another interesting specimen I discovered at Hastings 
was growing out of an ivy stem encircling a large oak 
tree. The gall was in its first year of growth and 
consequently immature. For several reasons I was 
obliged then and there to remove it, and did so by 
sawing away a length of the ivy stem, with the gall 
remaining upon it. It was globulose in form, brownish 
in colour, with a rough surface, and 25 mm. in 
diameter. It is now in my collection of oak galls. 
The popular designation of “truffle gall” is: singu- 
larly appropriate, both its appearance and manner 
of growth when beneath the ground coinciding with 
that of the fungus. The black truffle (Tuber melano- 
spermum) exists a few inches under ground, and 
although partial to beech woods is found amongst oaks 
also. Its external appearance is very much like that 
of a radicis gall. 
Aphilothrix seminationis, Giraud. 
(Plate XXIV, div. B.) 
Cynips seminationis, Giraud, Mayr; C. inflorescentix, Schltd. ; 
Aphilothrix seminationis, Adler, Licht., Fitch, Mosley; Andricus 
seminationis, Mayr, Cameron. 
English name of gall.—“ The Barley-corn Gall.” 
Position of gall.—On the stems of staminate catkins and on 
leaf margin. 
