330 
IMAUS. By Dr. E. Strand. 
32. Genus: Imaus Moore. 
But few species distinguished by long, thin and porrect palpi, long-combed antennae, slightly convex 
border of the hindwing, and some peculiarities in the neuration of the wings, e. g. 6 on the forewing rising behind 
the upper cell-angle. From Euproctis the genus differs by the veins 6 and 7 of the hindwing being separate; 
of less importance is the fact that the palpi are longer and the liindwings differently shaped. •— In the 
forewing 7+8+9-1-10 rise on a footstalk and 11 does not anastomose with 12. 
mundus. I. mundus Wkr. (40b) is light brown, the legs spotted black; forewing with a sharply marked 
subbasal and antemedian row of spots, a spot in the cell, a line on each side of the discocellular, a deeply 
dentated postmedian line, as well as submarginal crescents and spots. Hindwing with an indistinct submarginal 
band and marginal spots. 80 mm. In North West India, as well as Java; it may also be reckoned to the pale- 
arctic region. 
durioides. I. durioides sp. nov. (40 a) is a medium-sized species with a whitish ground-colour, lying before me 
in one specimen from ,, ? ? New Guinea“ and one from the Kina-Balu, 12 to 1500 m (Waterstradt) ; the latter 
locality is undoubtedly correct. Upper surface see fig.; beneath both wings are dirty whitish with a greyish- 
brownish discocellular spot and small, extinct, similarly coloured limbal punctiform spots. Palpi greyish, outside 
black. Expanse of wings ($): 50 to 59 mm. 
ochrias. 1. ochrias Trnr. (39 g). + 32 mm. Head and thorax ochreous-grey whitish. Palpi ochreous-whitish 
with some dark brown scales on the outside. Antennae whitish-ochreous. Legs whitish. Forewing triangular, the 
costal margin very much curved, apex rounded like the oblique margin; vein 11 separate; ochreous greyish- 
whitish with light grey markings and some dark brown scales here and there; two dark brown spots near the 
base at the costal margin resp. anal margin; an extinct undulate transverse line at 1 / 4 and another one from the 
costal margin before the middle to the anal margin behind the middle, being united in the surface of the wing 
with a dentate line from 5 / 6 of the costal margin; a light grey circular spot; a dentate subterminal line and 
a small dark brown spot on the second line at the end of the cell. Margin of the white hindwing projecting 
rounded off, particularly at vein 3; fringes white. — Apparently closely allied with Imaus pratti B.-B. — North 
Queensland, Kuranda; in October and November. — In the original description the characteristic jet-black 
punctiform spots on the distal margin and in the terminal third of the costal margin are not mentioned. 
margine- I. marginepunctata B.-Bak. <+ whitish, palpi outside black, abdomen straw-coloured with a whitish 
punctata. ana j brush. Forewing with a short dark basal line, a double dark antemedian line, an interrupted median line 
cutting a round cell-spot, margined with grey, a double, serrate postmedian line, two spots at the cell-encl, and 
a subterminal row of grey diffuse spots between the veins. The basal quarter of the costal margin is black, 
then it is spotted black. Hindwing white. Veins 10 and 11 anastomose. Expanse of wings: 32 mm. Aroa River 
in British New Guinea, in March. — Before me is a <$ (Coll. Seitz), the patria being unfortunately merely stated 
to be New Guinea, with an expanse of but 26 mm, in which the median line and the cell-spot are only very 
feebly noticeable; at the end of the cell there is a blackish, midway narrowly interrupted transverse streak 
convexly bent towards the margin and appearing distally dentate owing to the veins being dusted blackish, 
and being identical with the two spots mentioned in the original description. I should rather describe the sub- 
limbal marking as a zigzag-line partly united with a transverse row of internerval spots situate within the 
pusilla. zigzag-line. Only the upper half of the outside of the palpi is black (f. pusilla form, nov.) (40 a). 
dubia. I. dubia B.-Bak. +• grey. Abdomen yellowish-white. Forewing with traces of a basal line and with 
an antemedian, irregular dark grey line, a similar median line cutting a spot formed of raised scales at the end 
of the cell, and a postmedian serrate double line followed by a subterminal row of dark diffuse patches. Distal 
margin spotted dark, costal margin in the terminal half spotted black, hindwing of a pure white. Expanse of 
wings: 32 mm. ■—- Aroa River in British New Guinea, March and April. — Distinguished from marginepunctata 
by its darker colouring, somewhat differently running lines, and by the veins 10 and 11 not anastomosing here. 
sulphurea. I. sulphurea B.-Bak. + head, collar and forewing sulphureous greyish, thorax and abdomen greyish, 
hindwing whitish, hued somewhat sulphureous yellowish. Forewing with 2 black basal spots, an antemedian, 
irregular black line, a black median line cutting a blackish spot at the cell-end, then follows a subparallel, dark- 
spotted line and a subterminal, irregular, dark line, the distal margin and terminal half of the costal margin 
spotted dark. Expanse of wings: 32 mm. Aroa River in British New Guinea, March. 
niveus. I. niveus B.-Bak. (40 b). <$: white, palpi on the sides brown. Forewing on a great part of the surface 
with erect scales. Expanse of wings: 62 to 64 mm. British New Guinea, March and April. 
