LEUCOMA. By Dr. E. Strand. 
309 
L. seminsula spec. nov. (42 k). A $ captured by Dr. Seitz in Hongkong on November 6th is allied to 
L. fenestrata Hmps. ; the forewing is the same except the middle hyaline spot being a little larger, whilst the 
hindwing deviates more, exhibiting 2 hyaline spots of almost cpiite the same shape and size as those in the 
forewings. From L. ecnomoda Surinh. it differs among other marks by the subapical hyaline spot being single 
on both wings. Expanse of wings: 28 mm. Type in the Coll. Seitz. 
L. ecnomoda Swinh. (42 k). <$. Allied with L. fenestrata Hmps., but the hyaline spots are much larger 
and differently shaped; in each wing the greatest part of the area is occupied by such a spot being inside uni¬ 
formly curved and ending in front into a dot below the costal margin, being outside, however, very irregular, 
forming 3 quadrangular expansions in the forewing, one in the hindwing; in the forewing moreover with an 
almost subapical hj^aline double spot, in the hindwing at the same place a hyaline spot and a similar patch 
beside it. Expanse of wings: 29% mm. Java, Sumatra. 
L. thyridoptera Hmps. (39 a). <$: white. Forewing hyaline except the marginal areas. The areas 
of the costal margin and distal margin are a little brownish, four irregular, oblique antemedian lines formed 
by raised veins, in the disc a patch formed by white scales; the interior edge of the marginal band is angled 
at the veins 5, 2 and 1, and it shows some streaks formed of raised scales and a faded dark subterminal 
line. Hindwing hyaline except in the marginal area and posterior margin, from the middle of the cell to the 
proximal margin an antemedian patch of scales, a discoidal moon-spot, the interior edge of the marginal 
band is angled at the veins 5 and 2. Expanse of wings: 48 mm. Ceylon. 
L. silhetica Wkr. (39 a) is closely allied with L. divisa Wkr. (39 a), but it differs by being almost entirely 
hyaline, whilst in divisa both sexes are rather densely scaled. Silhet, in the Khasia Hills, common. 
L. divisa Wkr. (39 a). White. Antennae with brownish-yellow or brown pinnae. Wings silvery white. 
Abdomen with a yellow anal apex. Legs partly dotted black. Expanse of wings: 33 mm. India, Burma, Singa¬ 
pore, Penang, Pulo-Laut, Java, Borneo, Philippines. 
L. diaphana Moore (39 a). The <$ deviates from L. divisa by the frons and the costal margin of the 
forewing being orange-yellow, the antennal combs and the legs huecl orange, wings diaphanous with some haired 
scales; sometimes (fa. birmanica form, nov.) there are small heaps of scales at the upper and lower angles of 
the cells on both wings. Expanse of wings: 44 mm. India, Burma, Mupin, Kwei-Chow, Omeishan. There is 
also a specimen before me labelled ,,Sumatra“. — lactea Moore (39 a) from Darjeeling, according to the descrip¬ 
tion, is distinguished by black-spotted legs, palpal tips and frons, as well as by the pale ochreous costal margin 
of the forewing. It is at least to be separated as a side-form of diaphana Moore. It is not true, what we might 
presume according to Swinhoe’s ,,Revision“ (1903), that, lactea is the 2 of diaphana -<J, for I have seen the 
<3 and 2 of both forms. Nor is it correct what Swinhoe states at the place quoted above, that the types of 
both forms are in the British Museum; that of lactea is in the Berlin Museum. The latter is easily discer¬ 
nible from diaphana by its denser scaling, somewhat larger size and a more robust body. 
L. semiochrea H.-Schdff. (47 b). White with an ochreous-yellow thorax, head and anterior hips, brownish 
teeth of the antennal combs, and a dark, rounded, small spot, in the anal angle of the forewing, which spot 
may sometimes be absent (fa. alboanalis form. nov.). Australia (Adelaide). 
L. lobipennis Swinh. above and beneath silky white. Forewing triangular. Hindwing short, posteriorly 
somewhat elongate and broadly lobated at the anal angle. Antennae ochreous with a white shaft. Legs and 
palpi ochreous, beneath white. Expanse of wings: 42 mm. Dorey. 
L. discirufa Swinh. (39 b). Ochreous fawn-coloured; forewing with a large, ochreous-red discocellular 
spot, the fringes, the marginal line and the costal margin on both wings being of the same colour, hindwing 
in the costal half whitish, in the dorsal half as in the forewing, the latter very scantily strewn with some black 
scales. The whole under surface almost white, the margins of the wings and fringes, however, red. Expanse 
of wings: 24% mm. Pulo Laut. 
L. perfecta Wkr. <$: purely white. Head on each side with a black spot. Palpi with a black tip. Forelegs 
spotted black. Wings white and with white lustrous patches. Length of body: 16,3, expanse of wings: 37 mm. 
Sarawak. 
seminsula. 
ecnomoda. 
thyridop¬ 
tera. 
silhetica. 
divisa. 
diaphana. 
birmanica. 
lactea. 
semiochrea. 
alboanalis. 
lobipennis. 
discirufa. 
perfecta. 
