LARENTID.E—THERA. 353 



shining lead colour. This form seems to lie very rare. 

 There is a tendeucj' in Scottish specimens, in some districts, 

 to a darkening of the normal colouring. 



On the wing io Jnne and .luly: and in a rather more 

 numerous second generation in September and October. 



Larv.a rather short, smooth, the anal segment decidedly 

 forked; head slightly bent under, red, with a brown streak 

 over each lobe ; ground colour dark bluish-green ; dorsal line 

 of a much darker tint of the same ; subdorsal lines whitish, 

 fine and uniform ia width, quite white on the second segment ; 

 below the spiracles is a fine whitish line, tinged with yellow 

 on the hinder segments ; uudersurface green with three equi- 

 distant pale lines (W. Buckler). 



Aj)ril and May, and a second generation in August ; on 

 Scotch fir (Piiula si/frcstris). 



The winter is passed in the egg-state. 



Pl'PA apjiarently undescribed. 



The moth sits during the day among the needles in the 

 branches of Scotch fir, or occasionally upon the trunks, but 

 seems never to be very commonly seen ; it tlies at dusk or at 

 night and will come, the second brood especially, to sugar 

 smeared upon the pine trunks to attract Xodiur. While 

 sitting in the daytime its fore wings are laid down quite 

 coverinsr the hind, and touching each other over the abdomen ; 

 but when at rest at night or at sugar, are raised perpendicu- 

 larly, close together. It rather resembles the redder forms 

 of T. cnrinta. but its fore wings are longer, the first line more 

 deeply angulated, the band not streaked upon the nervures 

 nor so sharply defined ; the hind wings whiter, and its appear- 

 ance when in flight much more silvery. 



It seems to be found in fir-woods throughout England, 

 though in some ilidland and Northern districts uncommonly ; 

 also probablj- throughout Wales, since I have found it in 

 •Pembrokeshire. lu Scotland I have records from Wigtown- 



Vul,. VIII. z 



