64 Messrs. J. J. Joicey arid G. Talbot on new 
subterminal white line, strongly dentate anteriorly, but 
becoming obsolete posteriorly ; veins streaked with blackish 
behind this line, these streaks separated from a post-discal 
series of dark points on the veins by a series of white dots. 
Hind wing fuscous with a paler basal area. 
Underside paler than above; fore wing with no markings 
except a blackish streak on costa, 
Head and palpi ochreous mixed with brown ; antennze 
brown, the simple ciliation of inner side as in aroa, but 
having nothing corresponding to the black sexual comb of 
aroa ; tegule blackish brown; patagia grey-brown; abdo- 
men grey with black anal tuft; legs grey, mixed with black- 
brown. 
Length of fore wing 20 mm. 
Hab. Wandammen Mtns., 3000-4000 feet, 1 g (type). 
Also in Tring Museum from Oetakwa River, Biagi, Kumusi 
River, Collingwood Bay, and Goodenough Island. In B.M. 
2 ¢ g from Fak-Fak, Dutch N. Guinea, 1700 feet, Dec., 
1 og, Fak-Fak, Jan.—Feb. 
L. aroa is represented in the Tring Museum by the type 
(Aroa River), and 2 ¢ ¢ from Rook Island and Goodenough 
Island. 
The systematic position of Lasioceros is not easy to place. 
We retain it in the Notodontide, in which family it was 
placed by Baker. Our reasons for doing so are on account 
of the short third joint of palpus and the fore wing having 
vein la running into1ld. This latter character is found in 
most Notodontid, but is not typical of Hypside, to which 
family the genus has been referred by Sir George Hampson. 
The palpi are not Hypsid in character, but the position of 
vein 5 of the fore wing and 8 of the hind wing would atford 
some justification for regarding it as a Hypsid. Taking the 
characters as a whole, we consider that the position of vein 5 
of the fore wing is a divergence from the normal, just as 
occurs in several Geometride. 
Since these considerations were penned, it has come to 
our notice that the importance of the position of vein 5 of 
the fore wing was doubted by an American worker as a 
result of his investigations into the structure of the basal 
abdominal organ. 
William J. M. Forbes, in an article ‘On the Tympanum 
of certain Lepidoptera ”’ (‘ Psyche,’ xxii. n. 6, pp. 183-192, 
Dec. 1916), finds a special type of the basal abdominal organ 
to be characteristic of the Noétuidee and notes (p. 188) that 
“ Alypia and the Notodontide show interesting variants of 
this type,’ which in his scheme on pp. 189-90 he gives as 
