484 Prof. James W. H. Trail on the [sess. un. 



* Sorhus aucuparia, L. — (1) Galls of a Phytophis, known as 

 Urineum sorhenm, Pers., on both surfaces of the pinnae, on 

 which they form a whitish or yellowish- white or rusty brown 

 coat. On the Gjetfjeld, near Trondhjem. 



(2) The middle of the lower surface of each pinna is 

 covered with a coat of very long and very slender colourless 

 hairs, which shelter a few small greyish gall-mites. Near 

 Trondhjem. 



Seclum Bhodiola, DC. — Galls of a Phytophis recorded by 

 myself {loc. cit., p. 206). On the morraine of the Svartisen 

 glacier and on the North Cape. 



*Saxifraga aizoides, L. — Galls of PhytojJtus, deforming the 

 tips of the shoots. On the moraine of the Svartisen glacier. 



*S. oppositifolia, L. — Galls of Phyt(yptus, changing the 

 flowering shoots into pale green rosettes of wrinkled leaves, 

 among which there live orange-yellow mites. 



Galium horeale, L. — *(1) Galls of CecidomyiaGalii, H. Loew, 

 in the form of ob-pyriform swellings of stems and peduncles 

 just above the leaf-whorls, varying in size from a hemp-seed 

 to a pea. On the Gjetfjeld, near Trondhjem. This gall has 

 been recorded from Scotland by myself {Trans. N. H. Soc. 

 Aherd., 1878, p. 63a). 



(2) *Galls of Cecidomyia galiicola, F. Loew, consisting of the 

 clustered leaves of the whorls close to the tips of the shoots, 

 the leaves being broader and shorter than usual. Near 

 Bodo. Dr Loew believes that galls recorded by Mr F. Binnie 

 and by myself from Scotland belong to this insect. 



(3) Galls of Plvytoptus on the leaves. Near Trondhjem, 

 and at Bodo. Ptecorded by myself {loc. cit., p. 208) from 

 near Eide, and on Deeside in Scotland. 



Campanula rotwndifolia, L. — Ovaries galled by Miarus or 

 Gymnctron Campanula:. Common near Ulvik and at Falejde; 

 recorded by myself {loc. cit., p. 210) from Odde. 



* Veronica oj/lcinalis, L. — Virescence of tlie flowers, caused 

 by Phytopjtus. The axis of the flower may be shortened, and 

 the colour may be entirely greenish or dark purple-red, with 

 reddish-green stamens. 



PopuluH tremula, L. — *(1) Galls of the midge Diplosin 

 tremulcc, Winnertz, on the leaf-l)lades, leaf-stalks, or twigs. 

 Near Trondhjem. They appear on the leaves as rounded 

 sessile galls of a yellow or red colour, and about as large as 



