DRYOPHANTA SCUTELLARIS. 115 
tember, the imagines will continue to emerge during 
the following month, and until the middle of 
December. 
Albert Miller appears to have been the first to 
record this species occurring in Britain, having found 
it about forty years ago in the neighbourhood of 
Norwood. 
It is moderately abundant in the Hastings district. 
I have found it almost exclusively on oak bushes of 
Q. pedunculata in woods where there are also large 
oak trees; the earliest date being June 30th. 
5 hae rarely more than eight galls develop on one 
eaf. 
Dryophanta scutellaris, Hartig. 
(Plates I, XLIV, XLV.) 
Cynips quercus folii, Linn. ; C. folii, Hartig, Schenck, Schltdl. ; 
C. seutellaris, Schenck ; Dryophanta folii, Mayr, Miller, Marshall, 
Cameron ; D. scutellaris, Mayr, Oliver, Fitch, Adler. 
English name of gall.—“ The Cherry Gall.” 
Position of gall.—On the under-surface of the mid-rib and its 
offshoots. ; 
Manner of growth. —Single, glabrous, glossy, globulose, 
succulent. 
Colours.—Pale yellow, yellowish-green, pale green, pink, rose- 
madder. 
Average dimensions of a mature specimen.—Globulose 
form—diameter, 17 mm. 
May be sought during the months of July to October, and on 
fallen leaves until April or May of the following year. 
Growth is complete by the end of August. 
The typical condition of the gall is wnilocular and unilarval. 
The larva pupates in the gall. The imago emerges during the 
autumn and winter. ‘“ According to some observers the flies appear 
in October, and according to others not until March . . if kept 
in aroom they appear in November, but not . . . if in the open 
‘air. The fly begins in October to gnaw a passage from the central 
chamber . . . towards the periphery, but does not quit the gall 
. thisdependsentirely uponthe weather. . . . IThavere- 
peatedly noticed that the warm days of January and February 
entice the flies out . . but should frost continue many flies 
do not appear until March” (Adler, ‘ Alternating Generations,’ 
p. 61). 
