94 BRITISH OAK GALLS. 



with pink or red, lasting for some time, then deepening 

 to brown ; upon tlie 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 fiye sections, forming an 

 oblong-obyate outline and ob-compressed,and attained a 

 girth of 32 cm. It grew on the short stump of a yery 

 old oak tree in a wood near Hastings. I yisited 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 

 Avas 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 " trufile 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- 

 sj)Prini(ni) 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 radiris gall. 



Aphilothrix seminationis, Giraud. 

 (Plate XXIV, div. B.) 



Cynips seiniiiationis, Giraud, Mayr ; C. inflorescentiai, Schltcl. ; 



Aphilothri.r seminationis, Adler, Liolit., Fitch, Mosley ; Andricus 



seminationis, Mayr, Cameron. 



English name of gall. — " The Barley-corn Grail." 



Position of gall. — On the stems of staminate catkins and on 



leaf maro'in. 



