224 
SYPNA; POLYDESMA. By Dr. M. Draudt. 
peusteria. 
approxima- 
1a. 
aethiops. 
erebina. 
leucozona. 
rubrizona. 
striata. 
bark of the stem. The imagines emerge in July and according to Ribbe already in June near Granada. In 
Gibraltar there are 2 generations, the first in April, the second in August. 
R. peusteria Pglr. (23 i) resembles hybris. Forewings blackish grey, admixed with yellowish at base, 
with bold black semi-circular curved antemedian. The thin posterior transverse line dentate with an indistinct 
median shade in front. A large pale yellowish patch in central area. No stigmata. A yellowish subterminal 
line with darker inner edge is indicated. The dark fringes somewhat admixed with yellowish. Hindwings white, 
a blackish spot at anal angle. Fringes dark grey with paler admixture. Crests on abdomen bolder than in liybris. 
Pectinations of $ antennae somewhat longer. Kuku-Nor; a somewhat darker form occurs also at Sutshanski 
Rudnik (collection of O. Bahg-Haas), of which we are illustrating a specimen. 
R. approximata Alph. also most resembles hybris. Forewings are ashy grey, peppered with darker grey 
and therefore markings are more indistinct. Basal area has a straighter outer edge. The posterior transverse 
line is also straighter below the arc. The area between the two central transverse lines is dusted with grey- 
white towards the costa. Hindwings darker with a distinct central shade. North Ferghana (Tashkent). 
R. aethiops A. B.-H. (23 i) has black forewings, only faintly scaled with white in central area. Transverse 
lines jet black, the anterior one being invisible at inner margin, forming an arc; the outer line crenidate and 
with slight whitish edge towards the margin. Orbicular and reniform stigmata faintly circumscribed by black 
and with whitish centres. A white dentate subterminal line is distinct. There is an interrupted black marginal 
line. Fringes black partially admixed with whitish. Hindwings pure white, with blackish and nebulous whitish 
patch at inner angle. Veins faintly blackish at margin, fringes black, partially admixed with white. Wing ex¬ 
panse: 29—34 mm. Algeria, January to May, from Lamoriciere and Magenta. Rothschild remarks regarding 
hybris that “frequently melanic specimens occur” in Algeria, and these should possibly be classified here. 
11. Genus: Sypiia Guen. 
S. erebina Hmps. Head and thorax brown admixed with dark brown and grey. The crest on grey- 
brown abdomen is somewhat whitish. Forewings olive-brown speckled with blackish with darker shadings 
before the subterminal. Anterior transverse line dark with paler edges on both sides. In centre of cell a small 
white spot with black edge. The narrow reniform stigma has an ochreous streak in centre and a yellowish edge 
and is extended inwards on the mediana. An undulate line extends from there obliquely to the inner margin. 
The dark postmedian is edged with white on both sides at costa, otherwise the edge is pale brown and it proceeds 
backwards under vein 4 to reniform stigma. Subterminal black, extinct, the margin behind it slightly paler: 
on margin black streaks that are white outwardly. The grey-brown hindwings have an indistinct postmedian 
and double undulate subterminal. In many specimens the veins are dusted mauve-grey, transverse lines and 
reniform stigma are edged with bluish white, in others the median area is white except for a costal patch. Wing 
expanse: 58—64 mm. W. China (Nitou, Pu-tsu-fong, Ta-tsien-loo). 
S. leucozona Hmps. Head and thorax pale fulvous, admixed with ochreous. Forewings ochre-brown 
with mauve-grey tone in basal and postmedian areas. The double antemedian in intertilled with whitish. The 
white very narrow median area is dusted with brown and has a red-brown costal spot. Orbicular stigma small, 
white with brown edge. It is close to the white, narrow reniform that is extended outwardly at top and inwardly 
below; it has a brown centre. The double postmedian is intertilled with white, it proceeds straight to the reni¬ 
form and from there to inner margin with a black suffusion posteriorly. The black subterminal is spotted in its 
upper, dentate in its lower half. Hindwings pale grey-brown with traces of a postmedian and a double diffuse 
subterminal that is filled with whitish on inner side. Wing expanse: 62 mm. W. China (Washan); also from 
the Punjab. 
S. rubrizona Hmps. Head and thorax dark brown, mixed with grey. Forewings dark chocolate brown, 
dusted with mauve-grey in basal and postmedian areas. The double antemedian is intertilled with brown. 
Median area brown, except for a patch on costa. Orbicular stigma small and with black circumscription. It is 
close to the very narrow reniform that is elongated outwards at top and inwards beneath. The black postmedian 
is edged at costa on both sides and then only outwards with brown, it proceeds straight to reniform stigma 
and thence to inner margin. The black subterminal is marked as in the preceding species. Hindwings dark 
brown with postmedian indicated, having an ochreous edge on both sides as far as the inner margin. A double 
subterminal is intertilled with yellow-ochre. In many specimens the pale part of the median area is blue-white, 
orbicular stigma with pure white core. Wing expanse: 62— 70 mm. China (Omei-shan. Chia-kou-ho, Ta-tsien-loo). 
12. Genus: Polydesina Bsdv. 
P. striata Herz is smaller than the somewhat similar P. mastrucata Fldr. Body grey-white, abdomen 
almost white. Wings impure grey-white. Forewings somewhat darker, speckled with brown. The thin subbasal 
is dark brown, the anterior transverse line at arises from a dark brown costal spot and extends from the brown 
