APHILOTHRIX 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, 2°5 mm.; girth, 7-5 mm. 
May be sought during the months of May and June. 
Growth is complete by 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 resembles that of A. callidoma, but 
may be distinguished from that species by its point of 
origin—it never grows from a bud. 
Aphilothrix Sieboldi, Hartig. 
(Plates XXVII, XXVIII, XXIX, XXX, div. B.) 
Cynips Sieboldi, Hartig; C. corticalis, Schenck; Aphilothrix 
Sieboldi, Mayr, Adler, Licht., Miller, Walker, Fitch; Andricus 
Sieboldi, Mayr, Cameron, Mosley. 
English name of gall.—‘‘ The Red-barnacle Gall.” 
Position of gall.—On small branches and twigs near the ground. 
Manner of growth.—Sessile, glabrous, glossy, gregarious. 
Colours.—Cream, yellowish, pink, crimson, reddish-brown. 
Average dimensions of a mature specimen.— Height, 
6 mm.; breadth, 6 mm.; girth, 15 mm. 
May be sought during any month of the year. 
Growth is complete by the end of September. 
The typical condition of the gall is unilocular 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 was first recorded as British by A. Miller 
in ‘The Gardener’s Chronicle,’ No. 40, p. 1312; fig. 
