APHILOTHBIX SIEBOLDI. 95 



Manner of growth. — Solitary, glabrous, glossy, spindle shape. 



Colours. — Cream, green, greenish-yellow, suffused with pink or 

 red, brown. 



Average dimensions of a mature specimen. — Length, 

 6 mm. ; breadth, 2o mm. ; girth. 7-5 mm. 



May be sought during the months of May and June. 



Growth is complete l>y the end of June. 



The typical condition of the gall is unilocular and unilarval. 



The larva pupates in the gall. The imago emerges during the 

 following spring. 



Parasite, No. 44. Inquilines, Nos. 127, 130. 



This gall is slightly pubescent when young. Some 

 specimens are slightly pedunculated, and also marked 

 with longitudinal ribs more or less sharply defined. 



Catkin stems bearing these gall are often abnormally 

 thickened, and remain on the twigs all the summer. 

 Leaves are peculiarly indented or deformed in shape. 



The gall closely resem1)les that of A. caUidonui, but 

 may be distinguished from that species by its point of 

 origin — it never grows from a Inid. 



Aphilothrix Sieboldi, Hartig. 

 (Plates XXVII, XXVIII, XXIX, XXX, div. B.) 



Cynijjs Sieboldi, Hartig; C. corficalis, Schenek ; Aphilothrix 

 Sieboldi, Mayr, Adler, Lieht., Midler, Walker, Fitch ; Andricus 

 Sieboldi, Mayr, Cameron, Mosley. 



English name of gall. — " Tlie Red-barnacle G-alh" 



Position of gall. — On small bran-ches and twigs near the ground. 



Manner of growth. — Sessile, glabrous, glossy, gregarious. 



Colours. — Cream, yellowish, pink, crimson, reddish-l:>rown. 



Average dimensions of a mature specimen. — Height, 

 6 mm. ; breadth, 6 mm. ; girth, 15 mm. 



May be sought <luring any month of the year. 



Growth is complete l)y the end of September. 



The typical condition of the gall is imilocular and unilarval. 



The larva pupates in the gall. The imago emerges during the 

 following spring. 



Parasites, Nos. 44, 66, 175. Inquiline, No. 131. 



Alternate sexual generation : Andricus testaceipes, Hartig. 



This gall Avas first recorded as British by A. Miiller 

 in 'The Gardener's Chronicle,' No. 40, p. 1312; fig. 



