Publ. 5. 1. 1913. RISOBA. By W. Warren. 293 



anal angle; — in ab. strigata ab. nov. (= ab. 1 Hmps.) (53 e) a black bar extends along submedian fold from strigala. 

 base to submarginal line; the form megei 06er«fe. (53 e) which occurs in China, is altogether paler, without fus- megei. 

 cous darkening, the hindwing, especially in the #, being pale luteous with the border blacker by contrast . Japan, 

 Kiu-shiu, Corea; the form megei from China. 



B. quinaria Moore (53 e, f). Forewing grey white, irrorated with dark grey and blackish and often quinaria. ■ 

 tinged with pale green, suffused with dark green in the $ and blackish in the 2, except the basal area and apical 

 third, which remain grey; the lines dark but all indistinct; a black bar on discocellular, from which frequently 

 a waved black line runs to the submarginal line on submedian fold; the subbasal line, inwardly oblique, is plainer, 

 as the basal area remains paler; subterminal line black, crenulate, inbent on the folds; fringe mottled dark 

 and light; hindwing luteous tinged with brown, with a broadish diffuse outer brown shade; terminal border 

 black, narrowing to tornus; fringe luteous, with black dots at base. Several paler forms occur: ab. semipallens semipallens. 

 ab. nov. (= ab. 1 Hmps.) (53 f) has the costal and terminal areas pale, the dark suffusion being restricted mainly 

 to the inner margin, in the ab. aperta ab. nov. (= ab. 2 Hmps.) (53 f), the pale ground colour is sprinkled aperta. 

 with pale green or grey scales, without any dark suffusion; — in ab. nigrosignata ab. nov. (= ab. 3 Hmps.) (53 f) nigro- 

 the forewing is marked by a thick black bar on inner margin from inner to outer line; this aberration is usually si f/ nato - 

 small and pale with a diffused whitish space beyond cell of forewing; but it occurs also in a larger form, suf- 

 fused with lichen-green, ab. rufitincta ab. nov. (53 f), in which the patch beyond cell is irrorated with dull rufitinrta. 

 brick red; — lastly, the ab. irrorata ab. nov. (= quinaria Hmps. Faun. Brit. India, Moths, II, p. 379) (53 f) irrorala. 

 has the costal half of wing suffused with yellowish, while the inner and terminal areas remain whitish, with 

 a mixed darker green and grey shade from base along inner margin to middle. The species, which occurs in 

 Assam and Sikkini, N. India, is also recorded from Oniei-shan, W. China. 



8. Genus: Risoba Moore. 



Tongue well-developed; frons smooth; palpi upturned, the second segment broad, the third narrow, 

 blunt and elongate ; antennae of <$ almost as long as forewing, with sessile fascicles of cilia, and a tuft of scales 

 at base ;. shoulders, patagia, and nietathoracic tuft distinct and thickly scaled ; the tibiae fringed with hair ; abdomen 

 in (J long, the anal tuft forked; the sexes often differing in appearance ; neuration normal. The larva of the only 

 species known bears a conical prominence on the anal segment, and feeds on Quisqualis. Type R. repugnans Walk. 



R. basalis Moore (53 b). Forewing whitish, speckled with black and suffused with reddish brown; basalis. 

 the costal and terminal areas both whiter at middle ; a white patch from costa at base to before middle of inner 

 margin, partly tinged with rufous, bounded by a black line; inner line blackish, oblique to submedian fold 

 and minutely waved, then incurved to basal patch; outer line indistinctly double, biangulate below costa, 

 oblique outwardly above vein 4, inwardly below it, dentate and filled in with white towards imier margin ; an oblique 

 reddish brown streak from apex to outer line; in the terminal area a black streak on vein 6 and on veins 

 land 7; subtermmal line whitish, preceded at middle by slight black teeth; a row of black striae with white 

 lunules in front of them just before termen; reniform stigma rounded, with the centre and outline brown; an 

 oblique dark shade through it to inner margin ; hindwing white tinged with reddish brown ; the terminal border 

 broadly fuscous; cellspot brownish; fringe whitish tinged with redbrown; in one form ■ — ab. viridimargo ab. nov. viridimargo. 

 both the costal and inner margins of forewing are coloured green. A single ^J has been recorded from Hongkong; 

 otherwise the species is Indian. 



R. prominens Moore 2 (= vialis Moore <$) (53 b, c). £. Forewing iron brown tinged with grey, with promine.nx. 

 patches of green suffusion on median and outer dark areas; a silvery white patch from base of costa to inner 

 margin before middle with some brown and green scales on it; inner line dentate, obscure, incurved from sub- 

 median fold to basal patch; reniform stigma greenish white, with dark centre outlined with blackish, preceded 

 by greenish suffusion ; outer line sharply angled outwards below costa, then oblique inwards, minutely dentate, 

 with an oblique white band before it; subterminal line black brown, sharply dentate and irregularly waved, 

 obscurely margined with pale and at costa with white ; the apex black brown ; before termen a row of white lunules 

 outwardly edged with black; hindwing whitish with black cellspot and terminal border; the veins and inner 

 margin brown; 2 with basal patch pure white; outer line obscure, preceded at costa by a violet white suffusion, 

 but no distinct narrow band; thorax and base of abdomen usually snowwhite in 2, redbrown and fuscous in $. 

 Xorth and West China; also found hi the Loo-choo Islands; otherwise an Indian insect. 



Subfamily Acontianae. 

 While agreeing with the last subfamily in the bar-shaped retinaculum of the <J, the insects of the present 

 subfamily are without raised scales on the forewing, except in one genus of somewhat doubtful position; in 

 this, as in a few other genera, instead of the bar-shaped retinaculum, the $ possesses a tuft of hair below 

 median nervure. In general the subfamily vies with the preceding in variability of structure and shape of wings. 

 The larvae also agree with those of the Sarrothripinae, except in one or two genera, including Acontia, from 



III 38 



