211 



BROWN HAIR-STREAK. 



Thecla Betulce. 



PLATE XXVII. Figs. 1 & 2. 



Pap. Betulae, Lbm — Leivin, pi. 42 — Donovan, viii. pi. 

 250. 5 — Brown Hair-Streak, Harris. 



This is the laigest British speci-es of the present 

 group, the expansion of the wings sometimes reach- 

 ing eighteen Hnes. The colour of the upper side is 

 dark brown, with a silky gloss, the fringe whitish ; 

 towards the middle of the anterior wings there is a 

 blackish ill-defined mark, usually with a faint yellow 

 cloud beyond it in the male, and a large kidney-shaped 

 orange patch in the female. The secondary wings 

 in both sexes are covered with fine silky hairs inter- 

 nally, and the two projecting lobes at the anal angle 

 are marked with reddish-yellow. The under side is 

 entirely tawny yellow, inchning- to red at the hinder 

 extremity, particularly of the posterior wings, with 

 two narrow transverse undulating white lines, edged 

 with black, the anterior one abbreviated, and form- 

 ing only a dusky streak on the upper wings, edged> 

 with white. The antennae are ringed with whit© 

 and the apex of the club is rust-red. 



