254 The Scottish Naturalist. 



occur on a leaf, while of the former there are seldom more 

 than one. Both are common where they occur, (b) These 

 galls are situated just where the lamina joins the petiole, 

 usually two occurring on a leaf; sometimes one or three. 

 Form roundish, or irregular ; size -' to £' diameter. Surface 

 marked or wrinkled. Colour green or somewhat reddish. 

 Contains an irregular cavity, in which occur multitudes of 

 four-footed mites (Hcliacyus populit) of a reddish or white 

 colour. Ballater to Braemar, July to September, (c) Galls 

 of Bato?ieus fiopuli Kirch. The galls of this mite have been 

 already recorded (Sc. Nat. I. 155) by Mr. Norman as Scottish. 

 Dr. Buchanan White, in August, gave me specimens found by 

 him in Braemar, and a few days later, near Balmoral, I found 

 abundance of dry galls, and a few still fresh. They were 

 chiefly attached to the branches, and formed rough irregularly 

 rounded masses y 2 ' to 3' in diameter. They are green or 

 reddish when fresh, and are covered with a short downy 

 pubescence. When dry they are black, hard, and friable. 

 (d) Another mite-gall, an Erineum growth, I found very 

 abundant on leaves of aspens, near Balmoral, on August 23, 

 1873. These galls are indicated on the upper surface by 

 one or more raised blister-like patches, like those so com- 

 monly produced on poplar leaves by a fungus. The raised 

 patches have a yellowish colour, and are thus readily de- 

 tected. Below, there is a recess, thickly lined with red or 

 brownish hairs, among which many four-footed mites 

 (Phytopti) can be readily detected. 



( To T>e continued. ) 



ON THE FLOWERING PLANTS OF THE OARSE OF GOWRIE, 



IN PERTHSHIRE.* 



By COLONEL H. M. DRUMMOND-HAY, C.M.Z.S. 



THE Carse of Cowrie has within comparatively recent times 

 undergone a great change. At one period it must have 

 been one large extended lake or marsh, open to the influence 



* An abstract of a Paper read before the Perthshire Society of Natural 

 Science. As the author intends to use the material contained in this paper 

 in the forthcoming Flora 0/ Perthshire, "all rights are reserved." 



