new Species of Lepidoptera. 229 
broadly sericeous brassy brown, grey in certain lights ; abdo- 
minal area broadly purplish brown, a discal series of black 
spots tapering towards the apex ; all the wings with large black 
marginal spots; sides of thorax blotched with black: abdo- 
men with two longitudinal series of black blotches. Under 
surface altogether browner than the upper; the markings 
less defined, excepting upon the costal border of primaries, 
which is white; with the black markings of the upper surface : 
body fuliginous brown ; tarsi indistinctly barred with white. 
Expanse of wings 158-millim. 
New Britain. 
50. Phanaca? cossoides, sp. n. 
Aspect of a Cryptophasa (see C. albicosta), but differing 
entirely in structure, which is that of a Notodont: primaries 
silvery white, the basal two fifths more or less clouded with 
red-brown, the outer margin of the red-brown area inarched ; 
an indistinct curved stripe of the same colour crossing the 
wing immediately beyond the cell ; costal margin and external 
border also red-brown: secondaries smoky grey, with white- 
tipped fringe; head and collar smoky grey ; thorax whitish ; 
abdomen bronze-brown. Wings below brownish, with bronze 
reflections ; body sericeous white. Lixpanse of wings 29-31 
millim. 
Duke-of-York Island and New Britain. 
As the type of Phanaca is too much broken for me to de- 
cide its sex, and as it possesses simple antennz, whereas both 
specimens of P.? cossoides are males with tapering pectinated 
antenne, the generic identification of this species must for the 
present remain doubtful. In neuration it agrees fairly well 
with Phanaca, though, in this respect, one of the specimens 
exhibits a singular aberration, the upper radial of the left 
primary being forked. 
51. Acontia inconcisa, sp. n. 
Allied to A. segnifera. Above sordid silvery white: pri- 
maries crossed from the middle to the apex by a forked 
Y-shaped bronze-brown band, the lower half ill-defined; a 
brown spot at base of costal border ; external border irregu- 
larly speckled with brown ; a marginal series of brown dots; 
fringe cream-coloured, flecked with brown and black and 
tipped with white: secondaries with greyish external border ; 
fringe cream-coloured, tipped with white and traversed by a 
grey line. Primaries below shining grey, costal border cream- 
coloured, grey-speckled, spotted with black above the end of 
