THE FAUNA OF SCOTLAND. 41 



claws brown; over the legs is a curved black line. The body is grass- 

 green, with a black line on each side at the top, and directly over the legs 

 the folds of the skin are marked with black lines. The upper lines end, or 

 become very faint, at the 10th segment. The anal segment is hairy, the 

 tip often reddish, and bears two small cerci. 



A variety is also found with a white side stripe, and another with a faint 

 reddish dorsal line, and one is found on birch, with a double row (one on 

 each side of the food canal) of red square marks. 



A saw-fly, not distinguishable from N. miliaris, I have bred from a 

 differently marked larva to the above, which agrees more or less with Van 

 Vollenhoven's description. This larva had the head green, with a yellowish 

 line; there was a blackish stripe on each side, at the end of which were 

 the eyes; another line went down from the vertex to the middle of the 

 face, and the upper part was covered with small brown dots; the mouth 

 was brown. Legs grassy-green, with brownish claws. The body green. 

 Over the legs was a black line; the skin much wrinkled, and marked with 

 irregular black lines; at the sides the wrinkles are rather raised, and 

 edged with black. The back is also marked with black, the centre being 

 much lighter. Found during August and September (especially the latter), 

 feeding on Salix caprea, in Gadder Wilderness. 



47. N. PALLiATUS, Tliomson. 



Not uncommon. Imago in June. Larva August. Food plants — Salix 

 vitellina and iS. cinerea. 



Gadder, Possil Marsh, Bishopton, Loch Ranza, Arran, 



Kingussie. 



The larva has the head pale orange, which is palest at the sides, and 

 there is a pale ring in the centre of the face; eye-spots black, surrounded 

 by a dark brown ring. Legs pale green; the claws of a paler green colour 

 than the legs. Upper half of the body dark green, the lower half is paler; 

 and directly over the legs is a dark line of scarcely continuous dots, or in 

 most cases there is one large mark on each segment. 



Another larva had the head light brown, the eyes situated in a black 

 spot; there is a broad black spot on the vertex, touching the body; the 

 mouth is dark brown. Legs white, the claws brown; at the base the legs 

 are marked with black, and there is a black stripe in front of the 1st 

 abdominal pair. The body is pale green, with a white line on the sides; 

 below this white line the body is much paler. 



48. N. LACTEUS, Thorns. 



Not common. Imago in June, August. Larva ? Food 



plant — sallow {teste J. E. Fletcher). 



Possil, Lambhill, Gadder. 



Possibly N. palliatus and N. lacteus (as is certainly the case with N. 

 hergmanni, N. hrevivalvis, N. microcerus, N. curtispinus, and iV". virescens 



