384 



LTC^NICE. 



in both sexes ; the ground-colour is reddish brown, brightest in the female ; the fore wings 

 have an elongated discoidal spot, and external to this, reaching from the costa, a long 

 tapering streak of a darker colour, coming to a point as it approaches the inner margin and 

 bounded externally by a white line ; the hind wings have a patch of bright reddish brown 

 running from the costa to the inner margin, bounded internally by an indistinct white lino 

 and externally by a very distinct wavy line of the same colour ; the hind margins are 

 reddish orange. 



" Lai'va, when full-grown, is apple-green ; the segments are very definitely divided, and each 

 segment has four longitudinal white stripes, two dorsal and two lateral, and besides these 

 several oblique pale lines. The head is brown, and very much smaller than the segment 

 immediately posterior to it. 



" Pupa. — Pale brown and smooth, not attached by silken threads ; in this manner resembling the 

 pupa of T. quercus, which also does not attach itself by the head and tail." {Lang, I. c.) 



Z. hetulce is represented in China by a large form, which I now describe 



as 



Var. crassa, var. nov. (Plate XXVIII. fig. 11, $ .) Male. Agrees exactly in colour with dark 

 specimens of the same sex from Europe, but the tails are longer and more slender. The 

 female differs only from European examples of the same sex in having longer tails. On the 

 under surface there is no difference, except that the black spot above the tail is always 

 distinct and the outer transverse lino of secondaries is rather less angulated. 



Expanse, S 54 millim., $ 56 millim. 



This form occurs at Moupin, Western China, in July. 



Yar. elwesi, Leech. (Plate XXVIII. fig. 8, $ .) Male. Fuscous-brown, the discal area of 

 primaries tinged with orange-brown, especially beyond the black bar which closes the 

 discoidal cell. Secondaries with some black spots and orange marks on outer margin at 

 anal angle ; tail reddish orange, edged with black and tipped with white. Under surface as 

 in var. crasm. 



Female. Orange-brown, clouded with greyish brown towards the base of all the wings, apex and 

 outer margin black ; a black spot on secondaries in second median interspace ; fringes 

 whitish, grey at the base and, on the secondaries, at the extremities of nervules. 



E.xjjause, (J 50 millim., $ 54 millim. 



I have received examples of tliis form from Chang-yang and Ichang, Central 

 Cliina, and from Moupin in Western China. Occurs in July and August. 



When I described elwesi as a distinct species, I supposed that the larger 

 size and different coloration of ui)per surface were of specific value ; but since 

 receiving other specimens, not only of elwesi but also of crassa, from Moupin, 

 T ;im now inclined to consider both as exaggerated forms of Z. betulce. 



Zephyrus saepestriata. 



Dip.ms .sa;i„-slnatn, Hcwitson, 111. Diurn. Lcp. p. (57, pi. xxvi. figs. 7, 8 (1865); Pryer, 

 l{lio|.. Xilion. p. I.'}, pi. iv. fig. 5 (188()). 



