268 transactions. — Zoology. 



bursts open near tlie head, and the new-born butterfly gradually extricates 

 itself, and, stretching forth its legs and clambering on to some surrounding 

 object, allows its moist, thickened, and contracted wings to liaiig listlessly 

 from the body." 



There has been much discussion 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 Pacific Islands and is now gradually establishing itself 

 in Papua ; if its food-plants are to be obtained throughout the Moluccas 

 aud 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 Satyein^, Bates. 

 Percnodaimon, Butler. 



2. Permodaimon j^hito. 



Erehia pluto, Fereday. 



EreUa merula, Hewitson, Ent. Mo. Mag., XII., p. 10 (1874). 



Oreina (?) othello, Fereday, Traus. N.Z. Inst., VIIL, pp. 302-4, pi. IX. (1876). 



Percnodaimon ])luto, Butler, Ent. Mo. Mag., XIII., p. 153 (1876). 

 Male. — Dark bronzy brown, slightly deeper in tint towards the outer 

 margin ; primaries with a paler subapical 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 discal 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 subcostal ocellus in primaries ; expanse of wings 2 inches 1 line. 

 Argyroj)henga, Douhleday. 



3. Argyrophenga antipodum. 



ArgyroiJlienga antipodum, Doubleday, Ann. and Mag. Nat. Hist., XVI., p. 307 

 (1845) ; Gen. Diurn. Lepid., pi. 63, fig. 6 (1851) ; Butler, Erebus and Ter- 

 ror, Lep., pi. 8, figs. 4-7 (1874). 

 Male. — Dark greyish- brown, paler at base ; the disc 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 tegulse clothed with testaceous 



* See, however, Mr. W. L, Distant's paper, (Trans. Ent. Soc, London, 1877, p. 93, 

 et seij.) 



