374 The Scottish Naturalist. 



4. C. marginemtorquens Bremi, curls back the edges of the 



leaves of S. viminalis, for an inch or more along each 

 side ; and renders them thick, fleshy, hard, and yellow. 

 The separate galls measure about 6 by 1^ mm. 



5. Hormomyia Caprece Winn, forms pear-shaped bodies, scat- 



tered over the leaves, often in considerable numbers, with 

 the broad part projecting above the leaf, and the narrow 

 end below ; each is about 1 \-2 mm. long and broad ; the 

 walls are hard and woody. 

 Another form of gall, perhaps the work of the same insect, is 

 much like the last in texture, but is rather larger and 

 deeper green ; the galls are usually coherent in masses 

 along the mid-ribs and chief veins. They are often 

 common. They open below by an orifice for each 

 gall to allow the larva to escape. 



S. triandra L. From Woody Island, in the Tay near Perth, 

 Dr. White has sent me galls of Cec. heterobia B.Lw. on 

 this willow, both as swollen catkins and as leafy rosette- 

 galls. The former seem to prevail in spring, the latter 

 in summer and in autumn. 



Salix Oaprea. 



1 . Galls of C. Salicis Schranck. 



2. Galls of C. rosaria H.Lw. 



3. Galls of C. Caprece Winn, in typical condition, and also the 



form described above resembling the latter. 



All occur in Aberdeenshire, the three last mentioned abundantly; 

 I have these three from Sutherland, Moray, Kincardine, 

 Forfar, and Perth, (T.S.N., II., 301-2 ; T.A., I., 69), and 

 Mr. Binnie (B.L, 162) describes them from Glasgow. 



S. cinerea. The same remarks apply to this as to S. Caprea ; 

 only on it I have never seen the galls I attribute to 

 . C. Salicis forming any save slender enlargements of 

 the twigs (references as above, except T.A., 187SJ p. 

 .70). Mr. Hardy (I.e., p. 78) records his C. saligna from 

 leaf-rosettes of this plant. 



S. aurita. I have no record of galls of C. Salicis from this 

 willow (though doubtless it sometimes bears them), but 

 I have the forms 2 and 5, from Sutherland and Aber- 



