204 Professor Trail on the [sess. lii. 



8. Lcgnon crispum, Brenii. — In tliis gall the margins of 

 the leaves are rolled into narrow warty tubes, in the interior 

 of which live the mites {Phytoptus sp.) that produce them. 

 The tubes are very irregular in width, but do not resemble 

 any of the other mite-galls of the limes. They may be 

 readily overlooked, being inconspicuous, as they seldom 

 exceed 2 or 3 mm. in breadth, and 20 mm. in length. Ex- 

 amples are in my possession from Bonn, and from Salzburg 

 in the Tyrol. I am not aware of the occurrence of this gall 

 in Scotland. 



Of the above galls on T. parvifolia some leaves bore Nos. 

 2, 6, and 8, and others bore 5, 7, and 8. 



Geranium sanguineum, Linn. — In 1878 I brought home 

 with me, from Hardanger, a single example of the mite-galls 

 produced by Phytoptus Gcranii, Thomas. The galls are in- 

 volute leaf-segments, which become slightly thickened and 

 fleshy, and form tubes in which the mites live. Usually a 

 mass of the galls is clustered at the tip of a stem, where it 

 is very conspicuous, some masses reaching the size of a large 

 walnut. The galled leaves are often bright red or yellow. 

 These galls are very frecjuent on the coast south of Aber- 

 deen, and they have also been found at Allonby in Cumber- 

 land. On the Continent of Europe they are recorded from 

 Thuringia, Austria, Croatia, and Switzerland (Lugano). 



Acer Pseudo-Platanus, Linn. — In the town of Bergen, both 

 in 1878 and in 1887, I observed the leaves of several trees 

 almost covered with multitudes of the small red " nail-galls " 

 known as Ceratoneon vvhjnre, Bremi, the work of gall-mites 

 of the genus Phytoptus. Frequently a single leaf bears 

 hundreds of these galls, usually crowded in ])atches as closely 

 as they can be packed together. They are widely distributed 

 over Europe, and are common in Britain. 



Lotus corniculatus, Liini. — The wiill-]<nown and common 

 galls of Cecidomyia Loti, De Geer, were found upon this plant 

 at Vik, on the Hardanger Fiord, last August. They consist 

 of flower-buds mucli swollen and fleshy, wliich do not open, 

 are almost always more or less deep purple-red in colour, and 

 are very conspicuous. 11'hey arc connuon in Britain, and arc 

 widely distributed throughout Eur()])(\ 



Astragalus alpinus, Linn., was found on the way from 

 Oi fiord to the Voringfos, last August, bearing numerous galls 



