RISOBA. By M. Gaede. 
42. Genus: liisoba Mr. 
411 
Tlie numerous species closely resemble those of the previous Genus. Palpi rather less stout, the tuft on 
thorax shorter. On hindwings vein 5 is somewhat separated from vein 4. Type: repugnans Wkr. from India. 
In Vol. XV, p. 189 the Genus is fully discussed. Of the first species, each differs considerably from the others. 
R. sphaerophora Meyr. (= ekeikei B.-Bak.) (39 c). Forewings green, yellowish white at base, edged with sphaero- 
black. The inner line indicated by a short black streak on costa. Orbicular and reniform stigmata reddish 
yellow. A reddish yellow spot on inner margin below reniform stigma. The outer line black, dentate, parallel to 
outer margin, extending from a reddish yellow lunule on costa, that is situate in a yellow apical patch. Hind- 
wings ochreous yellow with black margin, that encloses a yellow spot near the anal angle. 40 mm. New Guinea. 
R. repugnans Wkr. (39 c). Forewings greenish grey with a yellowish white patch at base, almost ex- repugnans. 
tending to costa with wide dark outer edge. At disco-cellular a round white spot with brown centre and circum¬ 
scription. The outer line dark, incurved below costa, forming an inner edge to the brown apical patch, then 
indistinctly continuing to the inner margin. A red-yellow spot in centre of inner margin. Submarginal line 
delicately whitish, approximately parallel to the outer line. Hindwings brownish white, widely brown at margin. 
36—40 mm. India, Ceylon, Philippines. Only 9$ seem to be known. 
R. flavipennis Hmps. (39 c). Forewings orange-yellow. The inner line whitish, vertical at costa, curving flavipennis. 
inwards in cell and then again vertically. At costa it is conjoined with the outer line, that is somewhat excurved 
behind the cell and continuing thence obliquely inwards and vertically to centre of inner margin. At disco- 
cellular there are 2 black dots, that are conjoined by a radial streak. Submarginal line whitish accompanied 
by black dots on inner edge, parallel to outer margin, but vertically above inner margin. At outer margin 2 
grey-white spots with dark outline. Hindwings whitish, faintly brownish at margin. $ 36 mm. Bhutan. 
R. vitellina Mr. (39 c). Forewings olive reddish yellow. A white spot at base on inner margin. The inner vitellina. 
line indicated by black dots, proceeding somewhat outwards below costa and then vertically. A black streak 
at lower angle of cell, the veins being somewhat white proximally and distally of it. An outer row of black 
and white dots parallel to outer margin. A submarginal line is indicated in front of centre of outer margin. Hind¬ 
wings white and transparent, brownish at margin. $ 36 mm. Sikkim. 
R. variegata Mr. (39 d). Forewings olive-green with the usual white spot on inner margin at base, variegata. 
Reniform stigma with delicate dark brown outline and with a similar central spot. The outer line delicate, dark 
brown, closely behind the reniform stigma, curving thence inwards and then angulated outwards at nervure 1. 
From close to the apex a wide brown double line extends to inner margin posterior to centre. Hindwings as in 
vitellina. A $ of this species, the only Sarrothripinae, that was captured by the Wollaston expedition to New 
Guinea, has grey-white forewings. The basal spot is brown, oblique, wide, outwardly greenish yellow. Posteriorly 
to it a double line extends to apex. The area behind this line is distinctly pale brown, suffused with greenish 
yellow, similarly the central triangle anteriorly. Hindwings grey-white in basal half. 32—34 mm. Sikkim. 
New Guinea. 
R. glauca Hmps. (39 d). Forewings whitish and olive-yellow. Below base of cell a short white streak glaum. 
in reddish brown field. An inner line is not discernible. In centre of cell a black dot. Behind this a short olive- 
brown centra] line, that forms contact with the large reniform stigma having a delicate dark surround. The 
outer line is punctiform, regularly curved from nervure 7 to two-thirds of inner margin. Anteriorly there is 
a fainter parallel line that is edged with lilac-brown to the submarginal line, close to the outer margin. Hind¬ 
wings yellowish white, widely brown at margin. 36 mm. Borneo. Java. 
The following species are more or less green. 
R. jucunda Wkr. (39 d). Described as Di-phthera and giving this impression. Forewings bluish green with jucunda. 
black markings. The inner line with white inner edge, dentate, with acute angulation outwards at the sub- 
median fold. The central line proceeding outwards to the lower corner of reniform stigma, which is white with 
a black central spot. From the upper corner of reniform stigma a dentate line proceeds to the inner margin, 
where it conjoins with the outer line. The latter is outwardly edged with white on both sides, boldly angulated 
outwards at costa, dentate and somewhat angulated inwards below nervure 4. Submarginal line with faint 
white edge, dentate. Hindwings pale yellow, widely brownish at margin. 35 mm. 1 $ from Borneo. 
R. obliqua E. Prout. Forewings greenish white, widely brown in the posterior part behind the inner line, obliqua. 
A similar coloured oblique shaded stripe from apex. The inner line commences as a black spot on costa, thence 
forming the diagonal inner edge of the dark spot. Central line indicated anteriorly by a few dots fading away 
towards the inner margin in the dark dusting. Reniform stigma with delicate dark surround. A pale streak in 
front of the double outer line. The outer line black and double, with acute angle inwards behind the cell and 
rounded on the submedian fold, generally parallel to the outer margin. Differing by the green colour and the 
angulations of the outer line from the similar glauca. Submarginal line as in glauca , with darker patches anteriorly. 
Hindwings white with dark edge. $ 36 mm. Borneo. — philippinensis E. Prout. This is larger, ground colour philippi- 
nensis. 
