APORIA. 



469 



yellow at the apex, iiiul the secojidarics arc entirely of this colour with u jjatch of darker 



yellow at the base of oosta and below the median nervure. 

 Female. Primaries almost entirely black, suffused about the disc with greyish scales ; there is a 



series of white blotches along the outer margin and also wliite longitudinal patches at the 



extremity of the cell, the first being situated near the costa ; in other respects the female 



does not differ from the male, except in size. 

 Expanse, 58-GS millim., J (Jo millim. 



I have only one example of the female. It was taken with males at an elevation of over SOOO feet 

 at Ta-ehien-lu in .June. 



Yar. venata, Leech. (Plate XXXVL fig. :5, J.) Except that the black subraarginal band 

 of jiriniaries is often continued to the suhmedian nervure, the male agrees on the upper 

 surface with typical A. davidls; the female is less suffused with black. On the under 

 surface, in both sexes, the secondaries and the tijjs of primaries are rich lemon-yellow and 

 the venation is broadly bordered with black : the fringes are usually black, but in some 

 specimens they are not darker than in typical A. davidis. 



Expanse, S 59 millim., $ 55 millim. 



Tliis form, which at first sight seems to be a distinct species, occurs in the 

 same localities as typical A. davidis, and is probably a seasonal variety. In 

 one large male specimen from Chow-pin-sa there are two black nerve-like 

 streaks in the discoidal cell of each wing and a similar one in the submedian 

 interspace of primaries ; these streaks are visible on both surfaces, but are most 

 distinct above; the apical area of primaries is thickly dusted y\iih. blackish. 



Yar. venata is identical with F. daviditia, Oberthiir, of which the following 

 is tlie original description : — 



" En dessous, les ailes superieures de davidina sont plus empatees de noir vers le bord exterieur, 

 et les nervures des inferieures sont egalement plus largement noircies au contact du bord 

 exterieur. 



" Le meme cmpatement melauien se remarque en dessous ; mais I'apex et la face tout entiere des 

 ailes inferieures y sont lavees de jauiie canari assez vif, au lieu de jaune nankin pale; de plus 

 I'empatement nervural est d'un noir ardoise tendant plutot a I'indigo bleuatre qu'au brun sur 

 les ailes inferieures, alors que la nuance reste brun noir aux superieures. Pres de la base 

 des ailes inlcricurcs et assez loin vers le milieu des ailes, il y a une pilosito blanchatre rela- 

 tivement longue et epaisse. 

 , " La frange dans davidina est noire : elle est blanche dans davidis, sauf en remontant vers Tangle 

 apical des ailes superieures ou elle tend a noircir." (Oherthiir, I. c.) 



Occurs at Ta-chien-lu, Omei-shan, JS'i-tou, and Chow-pin-sa. always at 

 high elevations. 



Aporia procris. (Plate XXXIII. fig. 10, 6 .) 



Aporla procris, Leech, Entomologist, xxiii. p. 191 (1890). 



Pieris halisca, Obertliur, Etud. d'Entom. xv. p. 7, pi. iii. fig. 23 (1891). 



