THE FAUNA OF SCOTLAND. 37" 



mouth organs. The hody flat, the segments sharply separated, yellowish- 

 green, the back being darker, and on each segment are four rows of white 

 tubercles. 



35, N, LUTEUS, Pz. 



Very common. Imago early in June. Larva from July to September. 

 Food plant — alder. 



Banks of Kelvin, Cart, Clyde, Carron, and Loch Lomond (nearly every- 

 where). Glen Moriston, Glenelg, Caledonian Canal (in several places). 



Perth, Blair- Athole, Rannoch, Loch Tummel, Kingussie, Glen Feshie, 

 Aberdeen, Braemar, Bonar Bridge, Berwickshire. 



The larva has the head obscure greenish-yellow, with a brown mouth, 

 blackish eye-spots, and two brown marks on the vertex; it is covered with 

 short hairs. The legs are light-green, almost hidden by the overhanging 

 folds of the body; the claws are brown. The body is flat, tapering 

 towards the end, its colour green, like the green of the alder leaf; the skin 

 marked with tubercles; the dorsal surface is of a darker bluish-green, and 

 the anus greyish. 



36. N. BiLiNEATUs, Klug. 



Not uncommon. Imago in June. Larva in July and August. Food 

 plant — alder, 



Clober, banks of AUander. 



Rannoch, Glen Feshie, Braemar, Strath-Glass. 



The larva, according to Brischke and Zaddach, is of similar form to that 

 of luteus, but is slightly larger and broader. The head is yellowish, with 

 two round brown spots on the vertex, the eye-spots shining black, and 

 brownish mouth. The colour of the body is grass-green throughout, and 

 each segment carries three cross rows of white tubercles, each of which 

 ends in a whitish hair, and these are found also on the overhanging sides. 



37. N. DORSATUS, Cam* 



Not uncommon. Imago in June. Larva in June, July, and August. 

 Double brooded (?) Food plant — birch. 



Bishopton, Kintail. 



Rannoch, Braemar, Strath-Glass, Kingussie, Bonar Bridge, Altnaharra. 



Description of full-fed larva. — Head brownish-red: mouth black; eyes 

 situated in a longish black splash, which extends from the vertex. Body, 

 to the middle of the sides, brownish-red, obscured with black, the black 

 tint being deeper on the sides than on the back; the lower part of the 

 sides and anal segment reddish-brown, without any black markings; the 

 last segment hairy. The skin is smooth and shining; the legs reddish- 

 white. 



* Ent. M. M. xii., 129. 



