430 Mr. A. G. Butler on a hitherto unnamed Butterfly. 



fibres, which anastomose with each other and form a highly 

 complicated structure [loc. cit. pi. xx. figs. 10, 11). These 

 also exist in the tridactjle pedicellarice, but are much smaller 

 and hard to discover in teased preparations. I have since 

 found these structures in other species of Ecliinus m the same 

 situation and in the ophiocephalous pedicellarise of Arhacta. 

 It would be interesting to have some further information as to 

 the nature and distribution of these very curious structures. 



XXXIX. — Description of a hitherto unnamed Butterfly from 

 Madeira. By Aethur G. Butler, F.L.S. &c. 



Whilst incorporating the Zeller collection of Pieringe with 

 our Museum series I came across two specimens of a species 

 from Madeira labelled as the P. cheiranthi of Hiibner, but 

 differing considerably from that species. 



On referring to tlie Wollaston cabinet of Madeiran insects 

 I found eight specimens of the same species ; proving its con- 

 stancy. 1 therefore propose to call this butterfly 



Ganoris WoUastoni, sp. n. 



Intermediate between G. cheiranthi and nijjalensis, differing 

 from the former in its inferior size, paler and greener tint in 

 both sexes, the female without distinctly yellow secondaries 

 and with the black spots smaller and less distinctly confluent, 

 the three median veins all blackened beyond the black spots. 

 Under surface quite different from that of either species^ the tint 

 of secondaries and apex of primaries being greener even than 

 in G. hrassicce. From G. nipalensis it difters in having a 

 black longitudinal dash on tlie second median interspace on 

 the upper surface of the male, and the black spots in the female 

 more or less united by a sinuated blackish streak from the 

 inner margin ; all three median branches blackened (whereas 

 in G. nipalensis only the second and third are black) j the 

 secondaries below sulphur-yellow, densely irrorated with 

 blackish scales, the costa and apical area of primaries pale 

 sulphur-yellow ; the black spots with two black dots between 

 them. Expanse of wings, J* 67 millim., ? 72 millim. 



Madeira {T. V. Wollaston). 



