TREES AND SHRUBS 



The Purple Velvet-Bud Gall (Spathegaster Taschenbergi). This is a dainty 

 little violet or purple gall found in dormant adventitious buds of the bark 

 and small twigs. It may be sought for in April or May, and best on sunny 

 days, but is not common. The imago emerges in May or June. 



The Cupped Spangle Gall {Neuroterus f'umipennis) is found on the under- 

 surface of the leaf, and much resembles the Common Spangle, but is 

 slightly smaller, being J in. in diameter. The prevailing colour is rose- 

 madder, this being due to the presence of numerous microscopic stellate 

 hairs. Nearly 500 of these galls have been counted on a single leaf. They 

 may be found from July to September, and the imago emerges in the 

 following May. The alternate sexual generation is seen in 



The Hairy Pea Gall {Spathegaster tricolor). This forms a conglomerated 

 mass of 15-20 pea-like excrescences on the underside of the leaf, being most 

 frequently found on scrub-oak bushes, and stunted, and hedge-trimmed 

 growth along road-side banks. It is white, pale green, or yellow in colour. 

 It may be seen during the summer (May to August), and the imago emerges 

 in July. 



The Common Spangle Gall (Neuroterus lenticularis) is the largest and 

 most abundant of the lenticular galls. It is found from July to October, 

 scattered all over the under-surface of the leaf. It is greenish-yellow, 

 covered with crimson or reddish hairs, and measures about \ in. in diameter. 

 The imago emerges during March and April. The alternate sexual gene- 

 ration is 



The Currant Gall (Spathegaster baccarum), which is found on the stam- 



inate catkins, and on leaves. It consists of a sappy and soft cellular tissue 



containing an abundance of a whitish, tasteless fluid, and when growing on a 



catkin peduncle the aggregation much resembles a "string" of red currants, 



the galls being generally suffused with pink, or spotted or striped with red. 



It is the most common of the globular galls, and may be found in June. 



The imago emerges during June, the entire metamorphosis occupying less 



than two weeks. 



The Silk-Button Spangle Gall (Neuroterus numismatis) is perhaps the 



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