268 Transactions.— Zoology. 
bursts open near the head, and the new-born butterfly gradually extricates 
itself, and, stretching forth its legs and clambering on to some surrounding 
object, allows its moist, thiekened, and contracted wings to hang listlessly 
from the body." | 
There has been much diseussion as to how and when this Danais was 
introduced into the Australian region: the evidence seems to us to be in 
favour of its accidental introduction by man:* it has spread rapidly into 
most of the South Pacifie Islands and is now gradually establishing itself 
in Papua; if its food-plants are to be obtained throughout the Moluccas 
and Malaysia, there seems to be no reason why it should not extend its 
range into India or even over the whole of the old world; oddly enough 
several examples have recently turned up in the British Isles. 
Subfamily Saryrinz, Dates. 
Perenodaimon, Butler. 
2. Perenodaimon pluto. 
Erebia pluto, Fereday. 
Erebia merula, Hewitson, Ent. Mo. Mag., XIL, p. 10 (1874). 
Oreina (?) othello, Fereday, Trans. N.Z. Inst., VII., pp. 302—4, pl. IX. (1876). 
Percnodaimon pluto, Butler, Ent. Mo. Mag., XIIL., p. 153 (1876). 
Male.—Dark bronzy brown, slightly deeper in tint towards the outer 
margin; primaries with a paler subapieal area, upon which are four white- 
pupilled large black ocelli; the first three coalescent, their pupils forming a 
triangle, the fourth immediately below them; wings below altogether paler 
and of a greyer tint, a fifth small ocellus on first median interspace of 
primaries; secondaries with the diseal area irrorated with grey, so as to 
indicate a transverse irregular median line, and a rather wide outer border ; 
body black ; expanse of wings, 1 inch 11 lines. 
Female.—Larger and altogether darker than the male, a minute addi- 
tional subeostal ocellus in primaries ; expanse of wings 2 inches 1 line. 
Argyrophenga, Doubleday. 
9. Argyrophenga antipodum. 
Argyrophenga antipodum, Doubleday, Ann. and Mag. Nat. Hist., XVI., p. 307 
(1845); Gen. Diurn. Lepid., pl. 63, fig. 6 (1851); Butler, Erebus and Ter- 
ror, Lep., pl. 8, figs. 4-7 (1874). 
Male.—Dark greyish-brown, paler at base ; the dise of each wing covered 
by a large patch of fawn-colour, that of primaries enclosing a large rounded 
black subcostal bipupillated spot, that of secondaries crossed by three 
smaller unipupillated black spots ; fringe of primaries tawny, of second- 
aries grey ; body blackish ; head, collar, and tegule clothed with testaceous 
* See, however, Mr. W. L. Distant’s paper, (Trans. Ent. Soc., London, 1877, p. 93, 
et seq.) 
