480 



PAPILIONID^. 



Male. White. Primaries have a large black oblong spot at end of discoidal cell ; the apex, which 

 is much produced, and acuminate, is marked \\ ith black, the apical fourth of tho wing is pale 

 orange with a large black spot on tho costa and a similar one on outer margin, that on the 

 costa frequently unites with the black markings of the apex, forming a broad streak along 

 this portion of the costa ; the base of tho wing is blackish grey. Secondaries have the pattern 

 of the under surface faintly showing through. Under surface of primaries white, marked 

 with pale olive-grey along the costa and on apical area, the latter has also two patches of 

 darker olive ; discoidal spot as above : secondaries white, mottled with pale olive-grey over 

 the whole wing, with two white-spotted dark olive patches from costa and others along the 

 course of the median and submedian nervures ; none of these dark markings invade the outer 

 third of the wing, but the pale olive-grey markings are often heavier on this area ; the outer 

 margin is narrowly white interrupted at the ends of the norvules with dark olive. 



Female. Similar to the male, but the orange on apical fourth is usually absent, although in some 

 specimens it is faintly exhibited. 



Expanse, ^ 45-52 millim., 5 42-60 millini. 



Pryer remarks : — " this insect undoubtedly only appears once during the 

 year. There are no allied forms, and it is the only representative of the 

 genus in Japan. I know little or nothing concerning its life-history beyond 

 the fact that the larva feeds upon a bitter cress, common in marshy situations." 



Appears to be a common species throughout Japan. It is recorded from 

 Shanghai, and I have received several specimens from Chang-yang, Central 

 China, and from the province of Kwei-chow, Western China. In some of 

 the female specimens from Japan there are distinct indications of the orange 

 patch of the male. The Western-Chinese examples are rather smaller than 

 those from Japan. 



Distribution. Japan, Western and Central China. 



Genus LEUCOPIIASIA. 



I^ucophasia, Stephens, 111. Brit. Eat., Ilaust. i. p. 24 (1827) ; Doublcday, Gen. Diuni. 

 Lep. i. p. 38 (181.7). 



" Hkad rather large, very hairy. 

 " Eife.'i large, round, prominent. 



" Labia I ratlicr longer than tlic liead, very hairy. Basal joints long, curved at the base, 



carinalo externally, obliquely truncate at tlie apex ; second joint rather more than one 

 third the length of the first, mucli more slender, ovale, truncate at tlie base; third joint 

 about one sixtli tli(; length of the first, oval. 

 "Antenna' short, terminating in an abrupt, sliort, comjjressed club. 

 " TiionAX ratlier slender. 



Anterior wings elongate, rounded externally. The disctjidal cell very small, barely one third 

 llio length of the wing. Subcostal iiervure five-branciied ; tlie first nervulo thrown ofl' 



