THECLA W-ALBUM. 167 



paler brown, and the spiracles are of the same tint, 

 which also appears at the divisions between the abdo- 

 minal segments. 



The imago (Figs. 182 to 184) has the costal margin 

 nearly straight, the hind-margin of the fore-wings simple 

 and not far from straight, while that of the hind-wings is 

 scalloped ; the fringe is white. The hind-wings bear a 

 square projection at the anal angle, and a slightly-curved 

 tail at the extremity of the next nervure. The ground- 

 colour of the upper surface is a deep sepia-brown, with 

 a short black streak, which also shows on the under- 

 surface, across the discoidal cell of the fore-wings. Outside 

 this is a small patch paler than the ground-colour, which 

 in the female (Fig. 183) becomes a broad, curved orange 

 bar, stretching nearly across the fore-wings, and in the 

 same sex some traces of it are also to be found on the 

 hind-wings. The tail and projection are reddish-brown 

 (more distinct in the female), edged with black inside 

 the white fringe. The under-surface (Fig. 184) has a 

 ground-colour of rich greyish orange-brown, not however 

 of uniform tint. On the fore-wings is a darker brown 

 bar parallel to the hind-margin, decreasing in width as 

 it recedes from the costal margin. It has a dark outer 

 edge succeeded by a white line ; this bordering is also 

 repeated less distinctly on the inner edge of the streak. 

 On the hind-wings is a broader irregular band similar 

 in direction and colouring to that on the fore-wings. 

 Within the fringe on the hind-wings is a blackish line, 

 and within this again a red band with three black 

 spots, two being on the anal projection. The legs and 

 ventral surface of the body are white. 



T. W-album, Knoch (White-letter Hairstreak, some- 

 times called Black Hairstreak) (Figs. 185 to 187) is not 

 one of our common butterflies, though it is less scarce 



