APHILOTHRIX COLLARIS. 79 
Aphilothrix collaris, Hartig. 
Cynips collaris, Hartig, Schenck.; C. tegmentorum, Schtdl. ; 
C. fasciata, Schtdl.; Aphilothrix collaris, Mayr, Adler, Licht., 
Fitch; Andricus collaris, Mayr, Cameron, Mosley. 
English name of gall.—‘‘ The Collared Bud Gall.” 
Position of gall.—In lateral and terminal leaf buds. 
Manner of growth.—Solitary, glabrous, glossy, concealed. 
Colours.—Green, greenish-yellow, brown. 
Average dimensions of a mature specimen. — Height, 
3 mm.; breadth, 2 mm.; girth, 6 mm. 
May be sought during the months of August and September. 
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 
spring of the second year. 
Parasites, Nos. 117, 50. Inquilines, Nos. 133, 135. 
Alternate sexual generation: Andricus curvator, Hartig. 
The quickest way to discover this deeply - hidden 
gall is to longitudinally slice, with a sharp knife, every 
bud on twigs of a likely bush until the typical appear- 
ance of a galled bud is remembered; then by removing 
a few leaf scales only of other buds undamaged speci- 
mens can be secured. 
A most obscure gall by reason of its diminutive size 
and in being almost entirely concealed by: the leaf 
scales until quite mature ; then only a small portion of 
the apex is visible, which usually being brownish in 
colour harmonises with the leaf scales and renders 
detection very difficult. 
“Tt is hard, woody, conical or oval, sometimes almost 
round and smooth, the apex narrowed to a point, form- 
ing a blunt cone surrounded by a zone differently 
coloured from the rest of the gall” (‘ Brit. Phyto. 
Hymen.,’ vol. iv, p. 90). 
From the case of each gall is formed a slender 
appendage which penetrates deeply into the axis of 
the bud. When the gall is mature this appendage 
contracts and the gall falls to the ground, but other 
specimens which contain parasites or inquilines remain 
