NATURAL HISTORY SOCIETY OF GLASGOW. 305 



The galls have been found before in Britain. By the late Mr 

 Armstead, they are stated to occur commonly at Allonby, Cum- 

 berland, on willows growing among the cranberries ; and by 

 Mr Inchbald they were got in the same county, as well as on 

 Ben Ledi; but neither the larva nor the imago has been descril)ed 

 by the discoverers. The species has been referred by Mr Edward 

 Newman to his Euiira cynips; a statement which is disproved by 

 the fact, that the insect is not an Euura (which is, I suppose, 

 identical with Cryptocwmpus, Hartig) ; and, besides, the description 

 of E. cynipjs is so viigue that it will apply to more than one species, 

 and therefore must be simply ignored. 



By- myself the galls have been found on Ben Lawers and on 

 " Gary vel," Eannoch. Dr Buchanan White told me that he had 

 noticed them on the Braemar mountains ; and Mr James R. Watson 

 got' them on Ben Laoghal, Sutherlandshire. It is thus seen to be 

 widely distributed throughout the country ; but it is very local in 

 its habits, showing a partiality for particular spots on a mountain, 

 and not spread generally over it. Probably, also, it varies in 

 numbers during particular years ; for this year I could find none 

 in j)laces where on previous years the galls were very common. 

 The lowest elevation at which I have found them would be about 

 2000 feet; and from that height they extend to near 3800 feet, if 

 not higher. Very young galls, containing eggs, I have noticed at 

 the end of June; but they are most abundant from the middle 

 of July to the middle of August. 



The gall might readily be mistaken for a berry of some kind, 

 being shaped like one: roundish, sometimes oval or oblong, of a 

 green colour, often more or less marked with red. Each contains 

 one larva ; and, as a rule, there is but one gall on a leaf. Many 

 of the galls will be observed studded over with small yellowish 

 tubercle-like bodies ; these are fungi, which are found on most 

 of the smooth, hairless, pea-shaped saw-fly galls, no matter at what 

 elevation they may be situated. 



The larva has the head fuscous, somewhat darker in front; the 

 eyes are deep black; the mouth is also black. The feet are dark 

 greenish- white, with darker claws; the fourteen claspers are of 

 the same colour. Over each claw there is a small black mark ; 

 there is a large (comparatively), irregular mark over each foot and 

 clasper, except the first pair. The body is of a fuscous-white 

 colour throughout ; the contents of the food-canal give to the 



