PHYTOLOGY. 



SCOTTISH GALLS. 

 By JAMES W. H. TRAIL, M.A., M.B., F.L.S. 



I RESUME this subject in order to make some additions to 

 galls described by me in Vols I, and II. of the Scottish 

 Naturalist. During the past year I have found a few additions 

 myself, and have had others sent me by Dr. Buchanan 

 White, from near Perth chiefly; and in regard to some of those 

 already described I have been enabled to determine the 

 makers. 



In the " Transactions of the Glasgow Society of Field Natural- 

 ists," are interesting and valuable papers on the gallmakers of the 

 Glasgow district; the Hymenoptera being treated of by Mr 

 Cameron, the Diptera by Mr Binnie. Both gentlemen have 

 described several galls that I have not myself met with. 



Erophila verna I.. — Galls on this plant were sent me by Dr. 

 Buchanan White in spring. They are oval or roundish swell- 

 ings on the stem, just below or in the midst of the rosette 

 of leaves, about Y^ or y^ inch in diameter. On section 

 the walls are found to be rather hard, and thin, and the 

 cell is found to be occupied by the larv^ of a weevil, 

 probably Ceuthorhynchus drabce Lab. The gall is very 

 inconspicuous, and will probably be found to be rather 

 common and widely distributed. 



Stellaria holostea L. — In various places near Aberdeen, in 

 autumn. The tips of the shoots are often somewhat 

 swollen, and the pseudogalls are found to consist of the 

 closely imbricate leaves, which are hard, slightly fleshy^ 

 semiconduplicate, and yellowish-green. Between and 

 within the leaves, live many Aphides, but I have not 

 been able to determine the species. 



