18 Sir George H. Kenrick on 
extends from black abdominal margin across apex of 
the cell, and encloses the black spots, is not present in 
chimaera. 
“On under-side there is only a small green streak in cell 
of fore-wing, and there is hardly any green beyond apex of 
cell between the subcostals; the hind-wing is also very 
different from that of chimaera. 
“ Female: The fore-wing, as in male, more ovate than in 
O. chimaera, owing to the obliquely rounded-off hind- 
angle; cell without spot, whereas the three discal spots 
placed below cell are at least as large as in chimaera; 
black border to hind-wing broader than in chimaera, also 
differently shaped, the two posterior sections of the 
yellowish-grey area extended nearer to the cell than even 
in those chimaera which have a spot in the apex of the 
cell, no such spot in O. rothschildi.” 
Delias africanus, n. sp. 
(Plate III, fig. 2.) 
Head, legs, and antennae black, palpi with grey hairs. Thorax 
with yellow hairs below, and the usual white hairs above, which 
extend to the base of the abdomen and below the cell of the 
hind-wing. Abdomen yellowish white. 
Upper-side : fore-wing sooty black, a little darker on the margins ; 
hind-wing the same, but with an ill-defined yellowish patch extend- 
ing partly over the cell. 
Under-side : fore-wing sooty black, with a band of 5 irregular 
yellow apical spots: between the cell and the inner margin the 
spaces between the nervures are partly covered with white scales. 
Hind-wing velvety black, a curved band of sulphur yellow near the 
base ; the greater portion of the disc is filled with an elliptical patch 
of pale pink suffused with orange: beyond the cell is a singular 
black patch resembling a negro’s head and neck. Exp. 60 mm. 
Arfak Mountains, January 1909. 
Near to D. d’ Albertisi, Oberthiir, but differs in the 
shape and position of the black patch on the under-side of 
the hind-wing. 
Delias imitator, n. sp. 
(Plate III, fig. 3.) 
Head, palpi, antennae, and legs black. Thorax black with a few 
white hairs above. Abdomen dark grey above, white beneath. 
Upper-side : fore-wing rather pointed, and outer margin slightly 
