The Scottish Naturalist. 171 



and at Ballater and elsewhere in this district for some time 

 afterwards. They usually occur on the catkins, 4 to 5 on 

 each. They are oval, about \ inch by \ inch. The surface 

 is green, naked, but irregularly striated faintly. On making 

 a section each is found to contain a whitish hard inner gall 

 closely surrounded by, and grown to, the fleshy green outer 

 case/ and enclosing a comparatively large cell. When al- 

 lowed to dry the stride became much more apparent, and 

 could be seen to form an irregular network, the variations 

 of which in depth and regularity have been considered 

 as warranting the conclusion that, they belong to different 

 "species of Andricus. Though usually occurring on the 

 catkins they are not seldom attached to the mid-rib of a 

 leaf at one side, and form a gap in the lamina opposite it. 

 In eveiy respect but situation these latter resemble those 

 on the catkins, and are clearly formed by Andricus quadrili- 

 neatus. From the figures and description given by Mayr 

 those on the leaves are clearly those described by Schlec- 

 tendal and named by him Cynips margina/is, which is only, 

 as Mayr suggests, a synonym of Andricus quadri/ineatus. 

 (t) Galls of Andricus amcnti Gir. — On looking over 

 some oak catkins collected by Mr. W. Vice and myself, at 

 Ballater (along with the galls of A. quadrilineatus) , there 

 were found to be numerous specimens of the galls of A. 

 amcnti, new to Britain. The galls are sessile on the catkins; 

 they are ovate, and are attached by the blunt end; the apex 

 is sharp and is slightly bent to one side. Length j l e inch 

 to T l 2" inch, greatest breadth half as much. Surface covered 

 with very short stiff hairs, colour brown. They are mono- 

 thalamous and very thin-walled. Several of the insects 

 have emerged. (t) Galls of Spathegaster vesicat?'ix 

 Schlechtendal. — On Saturday, July 5th, 1 found galls of 

 this species common in oak leaves at Banchory, where I 

 had seen a few, about a month before, in their earlier stages 

 without recognising them as galls. This species also is, I 

 believe, new to Britain. They are sunk in the substance of 

 the leaf entirely at first, but as they approach maturity they 

 project both above and below, forming a very low double 

 cone, and enclosing a cavity of some size, the walls being 

 very thin. When mature they are readily seen, being 



