40: THE FAUNA OF SCOTLAND. 



black, the surface covered with a slight microscopic down, and slightly 

 punctured, the sides of the mouth somewhat greenish. Legs glassy- 

 greenish- white, with black claws; the abdominal legs light green. The 

 body, above, is of a beautiful dark sea-green colour, the lower half being 

 whitish. On the sides are ten large oval orange spots, each divided by the 

 folds of the skin into two parts, which are, however, closely continuous. 

 Below the orange marks is a row of roundish, irregular dots, and below 

 these again, and directly over the legs, is a row of oblong longish black 

 spots. Over the orange marks is a line of close, continuous black dots, of 

 irregular shape, but somewhat oval. These marks proceed from the 2d to 

 the 12th segment. On the back, at the termination of the segments, are 

 two rather roundish black dots. Directly over the anal segment is a large 

 black spot, much larger than any of the others, and this segment is also 

 beset with a few longish hairs. The cerci are black, white at the base. 



The flies which I bred from the willow were much smaller and darker 

 coloured, and the willow larvae had also a much brighter green colour. 

 This is a very peculiar species. In the perfect state, the female cannot be 

 separated from N. croceus ; while the male (as Prof. Zaddach informs me) 

 agrees perfectly with that of N. miniatus, a very different insect as 

 regards the female. The larva again very closely resembles that of 

 N. mdanocejphalus. 



45. N. PALLESCENS, Htg. 



Not uncommon. Imago end of June. Larva August. Food plant — 

 Salix cinerea. 



Gadder, Kintail, 



Braemar. 



Larva: head roundish, of a translucent whitish-gray colour, and covered 

 with longish white hairs; the eye-spots black; the mouth brown; the tips 

 of the mandibles black. Legs white, with the claws faintly brownish, 

 claspers white; there is a line of black dots over the legs. Upper part of 

 the body whitish, assuming a greenish tinge when the food canal is filled; 

 the lower half is whiter than the upper, and the skin is covered with 

 tubercles, each ending in a hair. The body is rather flattish. 



46. N. MILIARIS, Pz. 



= viridis, Ste. ; virescens, Htg. 



Abundant everywhere. Imago in May, June, July, and August. 

 Larva end of June and July, and August and September. Double 

 brooded. Food plants — birch, alder, and various willows. 



The larva is cylindrical, about 9 to 10 lines long. The head is shining, 

 grass-green, thinly covered with hairs; the eyes are situated in a black 

 line, which extends to the top and a little below them. The vertex is 

 sparingly covered with minute dots; the mouth brownish; mandibles 

 brown, black at the tips. Legs glassy yellowish-green, slightly hairy; 



