192 THE BOOK OF BRITISH BUTTERFLIES. 



colour, but paler on the dorsal ridges. The dilatations 

 below the spiracles are yellowish, the spiracles themselves 

 being pale green. The small, black, and shining head 

 is hidden beneath the second segment. There are three 

 pale, oblique, lateral lines on each side of each segment. 



The pupa (Fig. 215), about |in. in length, is perhaps 

 seldom suspended and girt, as is normally the case with 

 members of the family. It is nearly cylindrical. The 

 skin is delicate and shining, usually pale green in colour, 

 and having a dark green line down the back of the 

 abdomen. 'The rounded wing-cases have a slight brown 

 tinge; the head is pale brown, and the spiracles are 

 light. There are some minute bristles about the anterior 

 extremity. 



The margins of all the wings of the imago (Figs. 

 216 to 218) are entire, the costal and hind ones of the 

 fore-wings being very slightly convex in fact almost straight. 

 The fringe is pure white. The colour of the upper surface 

 of the male (Fig. 217) is brilliant blue of a purple tinge, 

 and a very narrow black line separates this colour from 

 the fringe. The upper surface of the female (Fig. 218) 

 is dark sepia-brown more or less tinged with blue, and 

 having a band of spots edged with red inside the hind- 

 margin of all the wings. The under-surface (Fig. 216) is 

 grey, bluish in the male, browner in the female. There 

 is the band of red spots near the hind-margin, having 

 a row of black spots outside them and a row of black 

 arches behind. The fore-wing bears beside nine white- 

 edged black spots, and the hind-wing about a dozen of 

 a similar nature. The white dash is well developed. 

 The females vary considerably in the amount of blue 

 and in the development of the red spots on the upper 

 surface, and a good series will be required for the 

 cabinet. 



