TRIFID^E. I47 



rather truncate ; costa nearly straight ; apex bluntly angu- 

 lated ; hind margin faintly hollowed below it and then filled 

 out, very little oblique except where rounded off to the anal 

 angle ; dorsal margin straight ; colour orange-yellow with all 

 the nervures distinctly tawny ; basal line incomplete, angu- 

 lated, first line complete, repeatedly angulated, both slender, 

 rust-red ; second line very oblique, direct and almost straight, 

 but bent sharply back close to the costa, purple-red, and 

 forming the inner margin of a broad frosted orange-purple 

 stripe or band which occupies the hind-marginal space and 

 contains the subterminal line— irregular, indented, tawny, and 

 shaded outside with orange-yellow ; orbicular stigma round, 

 a distinct slender tawny ring ; reniform stigma broad, with 

 a slender tawny margin, and containing a faint cloud of the 

 same colour, it is invaded and cut by a distinct, angulated, 

 rust-red transverse line which represents the usual central 

 shade; cilia orange-purple. Hind wings glossy pale yellow, 

 with the nervures, a large clouded central spot, and a broad 

 band beyond the middle, all smoky-black; extreme hind 

 margin orange-red ; cilia white. Female very similar in all 

 respects. 



Underside of the fore wings yellow, shading paler toward 

 the dorsal margin ; a black streak arises at the base ; orbicular 

 and reniform stigmata both indicated by smoky-black spots ; 

 beyond them is a very broad similar transverse stripe ; cilia 

 purple. Hind wings yellowish-white dusted with purplish- 

 orange along the costal region ; clouded with purplish-brown 

 beyond the middle; central spot obscure, smoky-black. 

 Body pale purplish-brown, legs purplish-orange, tufts paler. 



Not very variable, but the ground colour ranges from 

 orange-yellow to pale yellow, and the outer dark band from 

 purple-red to purple-grey. On the east coast of Scotland, 

 where it occurs very locally, the ground colour is more dull 

 and is clouded in some degree with reddish-brown. 



On the wing from the end of May to the beginning of 

 July. 



