Publ. 5. VIII. 1913. 
ISOLASIA. By W. Warren. 
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line; upper stigmata indistinct with orange annuli and slight bluish dusting; the costal area, a median 
shade, and the terminal veins also slightly bluish; fringe and extreme termen brown; hindwing bluish grey, 
freckled with olive, with darker cellspot and outer line; fringe orange rufous; ab. inornata Warr. (14 f) inomata. 
has the ground colour deeper red and the silvery bluish dusting on each side of the median area absent; ab. 
cuprea Warr. (14 f) has the median and basal areas olive brown, and the stigmata, the inner margin, cuprea. 
and the outer area beyond outer line a dull olive yelloAv brown, the dentate submarginal line showing darker; 
fringe of both wings of the same tint. The Punjab, Sikkim, and Bhutan, X. India; also from Tibet. The 
specimens of cuprea are all from Tonglo, Sikkim, taken at a much higher elevation than the type 
form. 
D. dentata Hmps. (14 f, g). Forewing rufous brown in <$, the basal and postmedian areas suffused dcniala. 
with bluish grey; darker, more purple brown in $, the suffusion purplish grey; inner and outer lines double, 
filled in with bluish grey; the outer dentate above middle; stigmata blue grey; the orbicular large, oblique; the 
reniform narrow, externally with some fulvous scales; claviform small and dark; terminal area brown, 
limited by the subrnarginal line; hind wing luteous grey, with darker .’cellspot, outer line, and submar¬ 
ginal shade. Sikkim and Bhutan, N. India; also in Tibet. 
D. sinuata Moore. This species, the type of which, a.<J, is in bad condition, appears to differ from sinuata. 
the $ of dentata only in having the outer line dentate below the middle as well as above, and in the 
inner line being thrice arched in its oblique course. Taken in Sikkim at an elevation of 10 000 feet. 
D. canosparsa Hmps. (14 g). Forewing purplish fuscous, sprinkled with bluish grey and a few yellow canosparsa. 
scales, the grey scales densest in basal and postmedian areas, on the upper stigmata, and along costa; 
the veins plumbeous; inner and outer lines black and crenulate, approximating on inner margin; med¬ 
ian area blackish, especially in cell; terminal area blackish, its inner edge lunate, beyond the whitish 
subterminal line; marginal lunules black; fringe mottled black and white; hindwing dull whitish with darker 
veins in basal half, the cellspot and outer line dark; dark fuscous in terminal half with a pale line above anal 
angle and the fringe white. Sikkim. 
D. herchatra Swinh. (14 g). Forewing deep black brown irrorated with yellow; veins purplish grey, herchatra. 
marked in places with whiter; a yellow, somewhat triangular patch at base of submedian interval; lines deep 
black, obscure, but conversely edged with purplish grey; claviform stigma dark, indistinct; orbicular 
and reniform with grey-clusted centres and yellow lateral edges; subterminal line yellow, externally edged with 
black, interrupted by the pale veins; fringe iron grey; the basal half darker and spotted with yellow; hincl- 
wing luteous tinged with grey; the cellspot, outer line, terminal area, and veins darker; fringe yellow 
and grey. Sikkim, Punjab, Khasia Hills, Assam, also in Tibet. 
D. sikkimensis Moore (14 g). Much smaller than herchatra and with only a few yellow scales; the sikkimensis. 
stigmata edged with whitish; the subterminal line whitish, interrupted; hindwing dull greyish white in basal 
half, fuscous terminally; in the $ the whole forewing is suffused with blackish, obscuring the markings. Sikkim; 
also found in Tibet. 
13. Genus: Isolasia Warr. 
Allied to Elwesia Hmps., with which it agrees in the main, and especially in the strong erect protho- 
racic crest; but the dorsum is also strongly tufted with long spatulate-tipped hairs; the praeanal segments of 
abdomen are armed with lateral tufts of hair, which are equally strong in the $ and the ; pectus and femora 
densely woolly; termen not so deeply crenulate as in Elwesia. Type Isolasia biramata Warr. 
I.biramata W arr. (14 g, h). Forewing pale ochreous, with the basal area to beyond middle of inner margin, biramata. 
a triangular blotch on middle of costa, and the terminal area beyond subterminal line dark brownish fuscous; 
the pale ground colour therefore forms a large V, of which the longer outer arm runs from before apex to 
inner margin and the shorter inner arm begins with the pale orbicular stigma; lines pale, with fuscous edging; 
the subbasal angled, the inner oblique, hardly waved; the outer forming the external margin of the 
costal triangle, and marked as two dark lines across the shorter arm of the V; subterminal line edged 
outwardly by the dark terminal area, sometimes bright ochreous, preceded by brown wedgeshaped spots; 
reniform stigma obscured by the brown of the costal triangle, but slightly edged with ochreous; a wavy 
dark terminal line; fringe fuscous brown with pale chequering and basal line; hindwing brownish grey, paler 
towards costa, with dark cellspot and terminal line; in the $ the contrast between the dark and light areas 
is less conspicuous, the ochreous ground being browner and the fuscous areas paler and more broken up; the 
reniform stigma pale; the hindwing more uniformly fuscous. Sikkim, N. India. 
XI 
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