FORMOSAN RHOPALOCERA 



95 



It should be noted that this species is quite distinct from Lycaena 

 nisa, Wallace and Moore, already recorded from Formosa. 



Family Papilionidae. 

 Subfamily Pierinae. 



38. Delias taiwana, sp. nov. 



Collection Number 177. Five male and two female specimens 

 Arisan, 7,300 feet, July and August, 1908. 



A comparison of the fine plate of Delias given by Leech, (Leech, 

 Butt. China, Japan, Corca, pl. XXXVIII, figs. 1 to 8) shows that 

 the male and female of this species are nearer to Delias sanaca, 

 Moore, war. adclma, Leech, fig. 5 £, 6 %) than to any other of the 

 species figured. The distinctive features of taiwana are the large spear- 

 headed discoidal patch of the hindwings, (in this characteristic it 

 approaches D. patrua, var. lativitta, Leech, pl. XXXV, fig. 1 £), the 

 yellow markings of the hindwings on both the iipper and undersides, and 

 the general boldness, size and clearness of the markings of both wings. 



Description. Male, ground colour black. 



Upperside — forewing. Spots and streaks larger and more con- 

 spicuous in some specimens than in others and either of a bright or 

 dull canary yellow. White discoidal streak more conspicuous than 

 in var. adclma. Discal band of streaks and spots seven in number, 

 curved from near costa to near submedian nervure, where they take 

 the form, in the third median interspace, of two elongated streaks 

 arising from the base which are generally more or less confluent ; a 

 broad, black uninterrupted space between the discal and submarginal 

 bands ; the latter has either seven or eight spots irregularly placed 

 in a curve from near costa to third median interspace in which there 

 are two spots sometimes almost confluent. 



Upperside — hindwing. All markings of a bright or dull canary- 



