List (>f the tusevt Fauna of the Coiintij. 



187 



Fig. 25. ApJulotlirlx glohuU. 



of its bright green colour. It is 

 spherical, with a small apical 

 papilla, and its surface is covered 

 with inconspicuous raised articula- 

 tions. The gall is sessile in the ter- 

 minal or axillar buds ; it somewhat 

 resembles a miniature melon. The 

 gall retains its green colour until 

 mature in late autumn ; the gall- 

 fly emerges therefrom in spring. 

 Aphilothrix globuli, Hartig (Fig. 

 25) [agamous form of Andricus 

 inflator] . 



QuERcus EoBUR, L. Bud. This 

 gall somewhat resembles that of 

 A. f/Iobidi, but is purplish green in 

 colour, and in shape and size 

 greatly resembles a grain of wheat ; 

 it is sessile, but more deeply seated 

 in the bud than the above-men- 

 tioned species, and is by no means 

 so easily seen, although common. 

 The gall is single-celled, and occurs 

 singly in the autumn ; it is mature 

 in October, and the gall-fly emerges 

 therefrom in April. Aphilothrix 

 AUTUMNALis, Hartig (Fig. 26) [aga- 

 mous form of Andricus ramuli] . 



QuERcus KoBUR, L. Bud. The 

 unopened oak-buds are frequently 

 seen to be pierced with a small 

 circular hole ; if on touching the 

 apex a small, woody, brown, smooth, 

 ovate gall is palled out, we have the 

 inconspicuous gall of A. collaris. It 

 is almost impossible to find the 

 galled buds until after the escape 

 of the fly, when they appear to Fm. 27. Apliilothnx collaris. 



R 



Fig. 26. 

 Apli ilothrix autumnalis. 



T 



