278 The Scottish Naturalist. 



The central cavity is rather large, and is lined with thin-walled 

 cells that contain protoplasm and starch as food for the larva 

 apparently. The insects emerged in August. 



x. Galls of Aphilothrix albopunctata Schla., already described in 

 this Magazine. 



v. Galls of Aphilothrix collaris Hart, were found by me in 

 June, 18S2, at Parkhill, north from Aberdeen, and also at 

 Banchory Ternan on Deeside. They belong to the group of bud- 

 galls, and are very inconspicuous, as they remain hidden among 

 the scales. The gall is spindle-shaped or ovate, 4 by 2 mm., and 

 ends in a conical point. It's surface is brown, and its wall is thin 

 and dry. All those found were empty. This gall is said by 

 Adler to be the work of the spring brood of Andricus curvator 

 Hart., which is very common in Britain, and has already been 

 described (" Sc. Nat." I, 193, e). 



z. Galls of Aphilothrix autumnalis Hart, have been already 

 recorded by Mr. Cameron from near Glasgow. I found one or 

 two specimens beside the Dee near Aberdeen in October, 1882. 

 The gall is ovate, 3*5 by 2*5 mm., and ends in a minute wart. 

 The surface is brown and smooth, with faintly marked longitu- 

 dinal ridges. The outer layers of the wall in the fresh state are 

 slightly fleshy, and adhere closely to the hard inner shell. The 

 gall is very inconspicuous among the scales. In the end of 

 autumn it falls to the ground. Adler believes it to be the work of 

 the " alternate generation " of the insect that makes the " Silk 

 Cotton gall of the Oak v — viz., of Andncus ramidi L., already 

 described in these notes (" Sc. Nat., II., p. 128, 0). 



V AGUS SYLVATIGA L. :— 



Descriptions of galls on this tree will be found in earlier volumes 

 of this Magazine (I.,p. 235, and VI, p. 256-57), the makers being 

 gall-midges. This autumn, in September, I found in Shambellie 

 woods near Dumfries two forms of mite-galls, neither of which had 

 been previously found by me in Scotland, though one of them 

 (Erineum fagineum) was recorded in Greville's " Scot. Crypt. 

 Flora " (t. 250,/ 1) from the Southern counties, and is said by him 

 to be of frequent occurrence. 



c. Erineum fagi?ieum Pers. (E. I act cum Fries) consists of patches 

 of short velvety hairs crowded together here and there on the 

 lower surface of the leaf, at first pale dirty white or gray, afterwards 

 passing into some shade of brown, or less frequently of red or 

 purple. The spots are seldom large, and are usually slightly sunk 



