TRIFID.€. f 



tufts very white ; anal tuft orange ; legs olive-brown, barred 

 with white, except the first pair, which are white beautifully 

 barred in front with clouds of black atoms ; leg tufts whitish. 



There is considerable variation in colour in this species, 

 but mainly in the directions above described. The yellow- 

 brown or yellow-drab forms are by far the most common, some 

 of these are almost unicolorous, others shaded and banded with 

 warmer colour, as stated. The olive-green specimens vary 

 nmch in intensity of colour, and some of them have the broad 

 darker band before the second line very dark and rich, with 

 a strongly contrasting whitish-green band beyond it. In the 

 red-brown forms the same degrees in intensity of colour 

 occur, and there are intermediates in which appear shades of 

 green or drab along with the red-brown colour ; and others 

 with the whole space from the base to the second line very 

 dark red-brown. Yorkshire examples in the collection of 

 Mr. S. J. Capper have the fore wings of the deepest olive- 

 green approaching olive-black, and with the dark shades still 

 blacker ; Mr. G. T. Porritt possesses one of a rich tawny or 

 purple-red, having the reniforra stigma black, and very dark 

 red-brown bands; Mr.W. H. B. Fletcher has a specimen in which 

 the yellow portion of the hind wings is shaded with black ; and 

 another having a slender black line in the yellow surface just 

 inside, and parallel with, the inner edge of the broad black 

 band of the same wings. 



On the wing in June and July. 



Larva stout, cylindrical, slightly thickened behind ; head 

 of moderate size, rounded, shining, pale brown dotted with 

 reddish-brown. Body orange-brown, or reddish, or brownish - 

 ochreous, dusted with blackish ; dorsal line thread-like, paler ; 

 spiracular stripe broad, pale orange-brown ; spiracles white ; 

 from the fifth to the tenth segment each is followed by a 

 conspicuous black spot ; there is a subdorsal row of oblicpie 

 pale dashes of the same tint as the dorsal line, and shaded in- 

 ternally with grey ; undersurface and sides below the spira- 



