SPATHEGASTER SIMILIS. 131 
turns a brown colour, and may be found in that condi- 
tion as late as the month of September. 
This gall was observed in England by Dr. Sir Thomas 
Browne, and mentioned by him in correspondence with 
Dr. Merrett in 1668 (see Introduction). 
Spathegaster similis, Adler. 
(Plate LIT, div. B.) 
Spathegaster similis, Licht., Mayr, Cameron. 
English name of gall.—‘ The Green Velvet-Bud Gall.” 
Position of gall.—In dormant adventitious buds of the bark 
and small twigs. 
Manner of growth.—Solitary, sessile, pubescent, ovoid, pointed 
at apex. 
Colours.—Pale green, green, pale brown. 
Average dimensions of a mature specimen. — Height, 
2mm.; girth, 5mm. 
May be sought during the months of April and May. 
Growth is complete by the end of May. 
The typical condition of the gall is unilocular and unilarval. 
ao larva pupates in the gall. The imago emerges during 
ay. 
Alternate agamic generation: Dryophanta longiventris, 
Hartig. 
This gall was discovered by Dr. Adler in the course 
of his experimental breeding with D. longiventris. 
His remarks are as follows: “ The gall is like Spathe- 
gaster Taschenbergt but more slender and pointed ; of 
greenish-grey colour and with a velvety rind. The 
colour is caused by a greenish pigment, but this tint 
is rendered dull by a covering of long white hairs, 
imparting to it a grey tone. It is especially the 
stronger and longer pubescence which is the important 
distinction between this and the 8. Taschenbergi gall” 
(‘ Alternating Generations,’ p. 66). 
It is scarce in many localities, rare in others, and 
not found at all in most districts. 
I have found but one specimen, which unfortunately 
was not in a good conditions 
