232 



The Scottish Naturalist. 



Veronica Chamaedrys L. (Scot. Nat. I., 158). The mite- 

 galls, tenanted usually by midge larvae, are of very com- 

 mon occurrence everywhere. 



Polygonum amphibium L. var. terrestre (Scot. Nat. II., 

 253). The galls of Cecidomyia Persicarice I,, were 

 found by me near St. Andrews. 



Betula alba L. (Scot. Nat. II., 304, a). Blister-galls on the 

 leaves, the work of a Cecidomyia, are common on Tents 

 Moor. 



J uncus acutiflorus Ehrh. I found the pseudo-gall of Livia 

 Juncorum Lat. on the coast near St. Andrews. This 

 gall is very common in Orkney, indeed it will probably 

 be found wherever it is looked for. 



Elymus arenarius L. I looked in vain on the roots of this 

 grass on the coast near St. Andrews, and along Tents 

 Moor for the galls of Tylenchus Hordei Schoyen. They are 

 so common near Aberdeen that their absence along the 

 Fife shire coast deserves notice. I have been told that 

 the grass was introduced there some years ago, and that 

 it is spreading rapidly. It is now abundant on that 

 coast, but the gallmakers have not yet found it out, 

 apparently. 



Agropyrum Donianum. A Correction.— In the " Proceedings 

 of the Perthshire Soc. Nat. Sc.," Vol. I. p. xli, I suggested the name 

 Agropyrum Donianum for the grass known at one time as Triticum alpinum 

 Don MS., but lately supposed to be identical with A. violaceum Horn. One 

 of the characters, on account of which it seemed to me distinct from the latter, 

 is the production of creeping stolons, A. violaceum being described as alto- 

 gether destitute of these. But it seems from what Professor Hackel tells me 

 that A. violaceum does sometimes produce stolons, though these differ from 

 the long scaly ones of A. repens in being short and scalers, which is also the 

 character of the stolons in A- Donianum. 



The great distinction (but not the only one) between A. Donianum and A. 

 violaceum is in the structure of the inner palea. In the former the ribs of the 

 palea form short lateral awns, small and rudimentary at an early stage, but 

 becoming conspicuous as the fruit matures. If this character is constant, and 

 I believe that it is, the specific separation of A. Donianum from A. violaceum 

 is, Professor Hackel says, justified. 



F. Buchanan White. 



