APORIA. 469 
yellow at the apex, and the secondaries are entirel}' of this colour with a patch of darker 
yellow at the base of costa 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 white 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, c? 58-68 millim., ? 65 millim. 
I have only one example of the female. It was taken with males at an elevation of over SOOO feet 
at Ta-chien-lu in June. 
Var. Venata, Leech. (Plate XXXVI. fig. 3, 2 .) Except that the black subraarginal band 
of primaries is often continued to the submedian nervure, the nude agrees on the upper 
surface with typical A. davidis; the female is less suffused with black. On the under 
surface, in both sexes, the secondaries and the tips of primaries are rich lemon-yellow and 
the venation is broadly bordered with black: the fringes arc usually black, but in some 
specimens they are not darker than in typical A. davidis. 
Expanse, (S 69 millim., J 55 millim. 
This 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 a^ ith blackish. 
Var. venata is identical with F. davidina, Oberthiir, of which the following 
is the original description : — 
" En dessous, les ailes superieures de davidina sent plus empatees de noir vers le bord exterieur, 
et les nervures des inferieures sent egalement plus largement noircies au contact du bord 
exterieur. 
" Le meme empatement melanien se remarque en dessous ; mais I'apex et la face tout enticTe des 
ailes inferieures y sent lavees de jaur.o canari asscz vif, au lieu do jaune nankin pale ; de jslus 
Tempatement 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 inferieures et assez loin vers le milieu des ailes, il y a une jnlosito bltmchatre rela- 
tivement longue et cpaisse. 
" La frange dans davidina est noire : elle est blanche dans davidis, sauf en remontant vers Tangle 
apical des ailes superieures ou ello tend a noircir." {Oherthiir, I. c.) 
Occurs at Ta-chien-lu, Omei-shan, Ni-tou, and Chow-pin-sa, ahvays at 
high elevations. 
Aporia procris. (Plate XXXIII. fig. 10, d .) 
Aporia procris, Leech, Entomologist, xxiii. p. 191 (1890). 
Pieris halisca, Obertliilr, Etiul. d'Eutom. xv. p. 7, pi. iii. fig. 23 (1891). 
