Pierine Butterflies of the Genus Delias. 145 



border, whilst Moore's T. sanaca (a full-coloured female) has 

 the subcostal area and cell of secondaries red ; this, however, 

 I believe to be a mere accidental discoloration, such as one 

 sometimes sees in Pierine butterflies, and due perhaps to 

 staining through the chance dropping of meconium from 

 above as the insect rested below a twig ; but at best a mere 

 aberration. In some examples, especially where the yellow 

 is deep in tint, it is confined to the inner half of the wing 

 and partly divided from the scarlet submarginal spots by 

 white crescents ; in others these crescents are wanting ; fre- 

 quently the yellow covers nearly the whole of the paler 

 portion of the wing, and (rarely) it entirely obliterates every 

 vestige of white. In the sport to which Wallace gave the 

 name of Thyca indica the black suffusion on the upper 

 surface at apex of primaries is weakly defined and the black 

 veins on the under surface of the secondaries are expanded 

 by a bordering of black scales at the inner edge of the scarlet 

 spots. None of these varieties are limited to any locality, 

 excepting, perhaps, the variety without white on the under- 

 side of the secondaries, of which we only possess a female 

 from Toungoo ; a male from Rangoon has almost lost all 

 trace of white, so that it is just possible that this variety may 

 be confined to Burma. 



4. Delias metarete. 

 Delias metarete, Butler, Trans. Linn. Soc. (2) i. p. 550 (1879). 



Malacca, Penang, Borneo, Sumatra. B. M. Sumatra, 

 coll. Hewitson. 



This is a Malayan representative of D. hierte, approaching 

 nearest to the var. indica, but the much more uniformly grey 

 apical area of the primaries above, the more restricted and 

 sharply defined limitation of the yellow area on the under 

 surface of the secondaries, and development of the black inner 

 bordering of the scarlet spots constantly distinguish it. Our 

 series consists of eight examples, two of which are from the 

 Godman and Salvin collection, also one in the Hewitson 

 collection. 



5. Delias hcemorrhcea. 

 Pieris hcemorrhaa, Vollenhoven, Mon. Pier. p. 10, pi. ii. fig. 5 (1865). 



Three examples, Banca. 6 $ , B. M. 



The more dusky bordering of the secondaries above, the 

 orange instead of yellow colouring below, and restriction of 

 the scarlet spots to three in number, readily separate this 

 insular form from the preceding. 



