SPATHEGASTER TRICOLOR, 1383 
Spathegaster tricolor, Hartig. 
(Plate LIV.) 
Newroterus tricolor, Mayr, Cameron; Spathegaster tricolor, 
Schenck, Mayr, Adler, Licht., Fitch, Marshall, Miller; S. varius, 
Schenck. 
English name of gall.—- The Hairy Pea Gall.” 
Position of gall.—On the under-surface of the leaf. 
Manner of growth.—Pilose, sessile, globular, succulent, con- 
glomerated, glistening. 
Colours. — White, very pale green, pale yellow. 
Average dimensions of a mature specimen.—Girth, 18mm. 
May be sought during the months of May to August. 
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 
July. : 
Parasite, No. 44. Inquilines, Nos. 127, 130, 139. 
Alternate agamic generation: Neuroterus fumipennis, Hartig. 
This gall is very distinctive and easily recognised. 
It occurs more frequently on scrub-oak bushes, and 
stunted, and hedge-trimmed growth along road-side 
banks, than in any other situation. In some districts 
it is exceedingly abundant. 
It occurs in clusters of as many as 15-20 on one 
leaf, and many will coalesce. 
Aggregations of this species are sometimes so large 
that a leaf, or several leaves on the same twig, will be 
entirely transformed into gall masses, as shown in the 
late. 
‘ When solitary the gall is situated on the mid-rib or 
its offshoots. When first noticeable it is like a tiny 
hairy elevation of the leaf; as growth proceeds the 
hairs separate and elongate, some attaining a length 
of 5-7 mm. They are slender, vitreous and iridescent ; 
at first pink, then crimson, ultimately turning brown, 
losing all colour, or falling off. 
The gall has an acid flavour. 
