TRIFin.-K. . 3UQ 



thronwhout ; skin soft anil so translucent tliat the pulsa- 

 tions of the internal vessel can be distinctly seen through 

 it ; ground-colour pale dingy green with the appearance as 

 though dusted over with a white powder ; dorsal and subdorsal 

 lines white ; spiracular stripe composed of two waved lines, 

 also white ; this stripe encloses the spiracles, which are white 

 edged all round with purple ; segmental divisions yellow, 

 this colour showing more especially when the larva is 

 crawling; ventral area and prolegs uniformly pale dingy 

 green; anterior legs still paler and slightly tipped with- 

 black. The young larva does not appear to differ either in 

 shape or colouriug from the adult. (G. T. Porritt.) 



April to June, on birch and aspen, feeding at night and 

 also on dull warm days ; in the finer, brighter daytime lying 

 coiled on one of the lower leaves, or commonly hehveen leaves 

 on the lower branches. 



The winter is passed in the egg-state. 



Pupa red-brown, covered with a blue frosting ; subterranean. 

 Not more particularly described. 



The moth may occasionally be seen sitting on a tree-trunk, 

 or" beaten out of an oak, in the very restricted districts in 

 which it is common, and has even been known to lly in the 

 sunshine. Its ordinary flight is, however, at dusk and 

 through the night, and it comes freely to the attraction of 

 sugar, and to flowers, especially those of the heather and 

 bell-heath. The capture at long intervals of two specimens 

 close to London has already been mentioned. Two more 

 were taken at Woodford, Essex, by Mr. Oldham a year or 

 two ago, and there is a record of one at Maiden in the 

 same county. Except a very few secured in Gloucestershire 

 and Somerset, these are the only captures of this species 

 known to me in the South of England ; its metropolis with 

 us is in the Midlands — at Sherwood Forest and other large 

 woods in Nottinghamshire, and in one or two woods near 

 Doncaster, Yorkshire. The latter locality seems to be of 



