66 LLOYD'S NATURAL HISTORY. * 



Polyommatus betulce, Godart, Enc. Meth. ix. p. 647, no. no 



(1823). 



Theda betulce, Stephens, 111. Brit. Ent. Haust. i. p. 75 (1828); 

 Lang, Butterflies Eur. p. 75, pi xvii. fig. i (1881); Bar- 

 rett, Lepid. Brit. Isl. i. p. 43, pi. 7, fig. 2, 2^-^(1892); 

 Buckler, Larvae Brit. Butterflies and Moths, i. p. 184, 

 pi. 12, fig. 4(1886). 

 Zephyrus betulce, Kirby, Eur. Butterflies and Moths, p. 58, pi. 



15, figs. 5fl, b (1879). 



The Brown Hair-streak measures an inch and a half across 

 the wings, which are of a dark silky brown above, with a 

 blackish discoidal patch in the male, usually with a faint 

 yellowish band beyond it; in the female the latter is replaced 

 by a broad curved orange band. The hind-wings in both 

 sexes are clothed with fine silky hairs towards the inner-margin, 

 and the tail and the slightly projecting anvil angle are marked 

 with orange-yellow. The under side is dull orange, with a 

 deeper coloured marginal line, most distinctly marked on the 

 hind-wings ; and with two narrow transverse undulating white 

 lines edged with black, the anterior one abbreviated, and form- 

 ing only a dusky streak on the fore-wings, edged with white. 

 The antennae are ringed with white, and the club of the antennae 

 is tipped with ferruginous. The Butterfly appears about the 

 end of July, or the beginning of August. 



The larva is green, with longitudinal white lines and oblique 

 yello.vish ones between them. It feeds on birch, blackthorn, 

 plum, and other trees, in spring ; the pupa is brown. 



The Brown Hair-streak is a very common Butterfly through- 

 out Europe and Northern and Western Asia ; it is widely 

 distributed in England and the south of Ireland, but is rarely 

 abundant, except in certain localities in the south. It is found 

 along hedgerows and about bushes, and is liable to be over- 

 looked on the wing amongst a crowd of Epinephele janira and 



