G4 Messrs. J. J. Joicey atid G. Talbot on new 



Rubterminal 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 ; antennae 

 brown, the simple ciliation of inner side as in co^oa, but 

 having nothing corresponding to the black sexual comb of 

 aroa ; tegulpe 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 :Nrtns., 3000-4000 feet, 1 <$ (type). 

 Also in Tring Museum from Oetakwa River, Biagi, Kumusi 

 River, Collingwood Bay. and Goodenough Island, In B.M. 

 2 cJ (? from Fcdc+Fak, Dutch N. Guinea, 1700 feet, Dec, 

 1 S , Fak-Fak, Jan.-Feb. 



L. aroa is represented in the Tring Museum by the type 

 (Aroa River), and 2 J c? from Rook Island and Goodenough 

 Island. 



The sj'stematic position of Lasioceros is not easy to place. 

 We retain it in the Notodontidse, 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 1 a running into 1 b. This latter character is found in 

 most Notodontidae, but is not typical of Hypsidse, to which 

 family the genus has been referred by Sir George Hampson. 

 The pal])i 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 Geometridae. 



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,' xxiii. n. 6, pp. 183-192, 

 Dec. 1916j, finds a special type of the basal abdominal organ 

 to be characteristic of the Noctuidre and notes (p. 188) that 

 " Alypia and the Notodontidae show interesting variants of 

 this type/^ which in his scheme on pp. 189-90 he gives as 



