144 Dr. A. G. Butler on the 
just estimate as to the value of the characters upon which 
species had been based. 
At the present time the collection of the Natural History 
Museum, though still far from perfect, possesses long series 
of the commoner species, and is chiefly weak in those of the 
Solomon Islands which have been described during the last 
few years. The generosity of Messrs. Godman and Salvin, 
whose collection of these butterflies is now incorporated with 
the National series, has filled up several blanks and greatly 
improved the representation of some of the more beautiful and 
rarer species. ‘Therefore, as I have been asked to bring the 
account of this genus up to date while fresh from its study, I 
will try to do my best, reducing the synonymy as much as 
possible. 
1. Delias eucharis. 
Papilio eucharis, Drury, Ill. Exot. Ent. ii. pl. x. figs. 5, 6 (1773). 
Pieris epicharis, Godart, Ene. Méth. ix. p. 155 (1819). 
Fifty-two examples, of which twenty-four are from the 
Godman and Salvin collection. Seven other examples are in 
the Hewitson series. India and Burma generally. B. M. 
This widely distributed and common species seems to vary 
very little. 
2. Delias ethira. 
Delias ethira, Doherty, Journ. Asiat. Soc. Beng. iv. p. 262 (1886). 
Berhampore, Ganjam and Khasia Hills (nine examples). 
B.M. 
Although most nearly related to D. hierte, this species may 
be regarded as tending to link the latter to D. eucharis. 
3. Delias hierte. 
Delias hierte, Hiibner, Zutr. exot. Schmett. figs. 77, 78 (1818). 
Var. Thyca indica, Wallace, Trans. Ent. Soc. Lond. 3rd ser. vol. iv. 
p. 351 (1867). 
Aberr. 2. Thyca devaca, Moore, P. Z. 8. 1872, p. 566. 
Forty-three specimens, of which twenty-one are from G. & 
S. coll.; also five in coll. Hewitson. India, Burma, and 
Siam. 5B. M. 
This species is very variable on both surfaces, but espe- 
cially on the under surface of the secondaries; the scarlet 
submarginal spots are always large and seven in number, 
but they are very well developed in some examples; the 
yellow colouring on these wings also varies from lemon to 
saffron, sometimes even tinged with scarlet on the abdominal 
