RISOBA. By M. (Jaede. l.s!) 
cliloromelana (18 b), by which the point in the snbmedian fold is more prominent. Pale green before it as far 
as the interior line. Exterior line black, obliquely outwards as far as behind tlie cell and broadly edged white 
outside, then more indistinctly continued, the point in the submedian fold more rounded, not so distinct as 
in chloromelana. A black spot at the cross-vein, darker green behind and above it as far as the exterior line. 
Dark violettish brown behind the median line, somewhat lighter after it, dark again only at the apex. A large 
white triangle at the costal margin behind the exterior line, with a larger and a smaller black spot at the 
costal margin. The white spot indistinctly edged outside with black. Submarginal line black, notched, ver¬ 
tical above the anal angle, dusted dark green inside of it above the inner margin. The fringe at the anal 
angle white. Hindwing narrowly edged with smoky brown as far as vein 3. $ 30 mm. Lake Albert, expedition 
of Duke Adolf Friedrich, denominated by Grunberg with a preoccupied name, but apparently not published. 
B. brevicosta E. Front. Thorax greenish white, abdomen yellow. Forewing white, dusted green in brevicosUt. 
the basal half and behind the middle, band-like violettish brown in the middle. Interior line black, rather 
straight, from I 3 costal margin to the middle of the inner margin, a black spot before it in the cell, a larger 
spot behind it. An erect black streak at the cross-vein. Exterior line oblique, undulate from the middle of 
the costal margin almost to the anal angle, indistinct. Submarginal line very dentate, jiarallel to the margin. 
Hindwing yellow, broadly darker at the apex. $ 34 mm. Sierra Leone. 
B. miota Hmps. (18 b). Thorax greenish brown, abdomen reddish brown. Fore wing greenish brown, miota. 
reddish brown between the median and exterior lines. Interior line vertical, black, below the median vein 
only as a black dot. A short oblique streak from the middle of the costal margin. Two black dots at the cross¬ 
vein. Exterior line double, introangular at the lower cell-angle and in the submedian fold, excurved between. 
Submarginal line of small black spots, excurved from veins 5 to 2 . Hindwing reddish brown. Forewing of 
2 with a black spot before the exterior line in the submedian fold. 25—28 mm. Sierra Leone. 
B. diagona Hmps. (18 b). Body brownish white. Forewing greenish white in the basal area as far as tUagona. 
the interior line which extends from of the costal margin to behind the middle of the inner margin. A dark 
green spot behind it as far as below the cell. Black erect tufts of scales in the cell and at its end. Red- 
brown below it at the inner margin. Exterior line from vein 7, rather vertical. Submarginal line somewhat 
more strongly notched, reddish-brown behind it. Hindwing brownish white, darker at the apex. 35 mm. 
Niger District, Cameroon. 
B. squamifera WUgr. {= lichenosa Fldr., autumnalis Dist.) (18 a). Thorax greenish white, abdomen squamifera. 
brownish white. Forewing bluish green. Interior line black, oblique, undulate. A black tuft of scales at the 
cell-end and 2 at the cross-vein. Exterior line edged with white outside, dentate, concave behind the cell, 
incurved below vein 4, a darker green line behind it, and a black streak in the submedian fold. Submarginal 
line black, notched. A black spot at the apex and one below it. Hindwing white, diaphanous, brownish at 
the apex. — The forewing may be darkened blackish brown, either only in the median area, or a little behind 
it, and thirdly on the whole wing; in the latter case, another black spot is behind the interior line in the sub¬ 
median fold. These forms were denominated as: wallengreni Etrd.. obscnrior Strd.. and fuscomixta Sfrd. 30 mm. 
South and East Africa. 
B. quadripuncta Hmps. (18 c). Thorax brownish white, abdomen yellow. Forewing white. Basal area quadripunc- 
and costal margin dusted green and black. Interior line interrupted, undulate, strongly excurved to the inner 
margin, absent in the original figure. A small black hair-tuft in the middle of the cell, and 3 at the cell-end. 
4 black streaks at the middle of the costal margin. Marginal area dark brown, notchedly margined. Hindwing 
yellow with a black marginal band. 38 mm. Mozambique. The species is extremely variable. 
B. hyblaeoides K enrich (18 b). Thorax greenish grey, abdomen dark brown. Forewing greenish grey, hyblaeoidcs. 
Blackish at the base with a dentate margin in front, narrowly continued at the inner margin as far as the 
median band which is equably broad, slightly excurved at the inner margin. Three spots at the cell-end. Ex¬ 
terior line black, notched, rather vertical, edged light outside. Submarginal line brownish, notched. Hind¬ 
wing dark orange with a black radial band. 33 mm. Madagascar. 
23. Genus: Riisoba Mr.*). 
About 25 species have been described of this genus, a full third of them being knoAvn from Noaa’ Guinea 
alone. It is uncertain whether several of these s])ecies of this extremely variable genus may not be put together 
later on. Nearly all of them exhibit the hindwing whitish with a costally broad, anally pointed marginal band. 
African are only three species, the rest Indian and mostly Papuan; in America the genus is replaced by the 
allied Baileya. — Proboscis normal, palpi erect, strong. Antennae tuftedly ciliated, almost as long as the 
forewing. Metathorax with a tuft, small tufts in the middle of the abdomen, anal tuft forked. Abdomen of 
o rather long. Neuration of forewing normal. Veins 3—5 of hindwing somewhat separated, 8 branching off 
from near the base of the cell. Type: repugnans Wkr. from India. 
*) In Vol. III. on p. 2913, the name i.s misprinted as Rif<ola. 
