flavifusa. 
centumnoia- 
ta. 
japoniea. 
proavia. 
centumnota- 
ta. 
rufescens. 
superba. 
latefasciata. 
rufescens. 
mixta, 
perfuscata. 
nigerrimata. 
im it aria. 
perfuscata. 
rufescens. 
118 CIDARIA. Bv L. B. Prottt. 
C. flavifusa Warr. (11 e). Erected as an aberration of the Sikkim cinereata Moore and only diagnosed 
as having “the greyish white tints of the middle area replaced by dull yellowish 5 ’; fortunately no such colour- 
form exists in cinereata and (by courtesy) Heydemann, in making the species properly known, has recognized 
Warren's as the type. Smaller than cinereata , more glossy, the spot near anal angle less constricted in the 
middle. N. E. Himalayas and W. China, reaching Ta-tsien-lu. — ab. centumnotata Heydem. has the median 
area white, in part clean, in its distal part finely irrorated with grey. 
C. japoniea Heydem. (= russata Pryer, nec Schiff; cinereata SternecJc, nec Moore) (11 e). This large 
Japanese species, which both Heydemann and I earlier took to be a race of cinereata Moore (N. E. Himalayas 
and Formosa), differs both from that and from truncata in the genitalia. Upperside similar to cinereata, edge 
of basal patch angularly projecting in the middle, incurved before and behind the angle, ending in a blacker 
spot at liindmargin, cell-dot generally better developed, hindwing less white. Underside more yellow-brown 
than in cinereata. I known no striking aberrations. According to Heydemann the Kwanhsien “cinereata'’ 
properly belong here. Strictly speaking, the name japoniea (1929) is a secondary homonym (see corydalaria 
japoniea, 1926) and perhaps Heydemann will propose a temporary substitute; but it was erected as Dysstroma, 
to which he justly accords generic value. 
C. proavia Heydem. (11 e), founded on 5 specimens from Szechuan, combines the characters, both super¬ 
ficial and morphological, of the two longest-known Dysstroma, so strikingly that one is probably not far wrong 
in viewing it as representing the progenitor of the group. The forewing most resembles cinereata, truncata and 
the comparatively unrelated korhi (11 h), while the markings of the hindwing agree almost exactly with those 
of citrata; median area of the former broad with the central projection long, liindmargin with a white spot on 
each side of the subbasal band and a large dark-brown spot outside the postmedian as in cinereata (compare 
japoniea, pi. 11 e). The name-type has the median area finely irrorated with grey. — ab. centumnotata Heydem. 
has the median area broadly white. — ab. rufescens Heydem., a $ from Omihsien, has it light ochre-yellow and 
whitish, as in the like-named aberration of truncata or rather (now that that is subdivided), ochreata Schille. 
C. superba Heydem. (lie). A splendid large species, which its author thinks should be placed between 
proavia and latefasciata. As the type $ (from Ta-tsien-lu) is unique, no description of the variation is possible, 
neither have the genitalia been examined. The said type with its broad, uniform rust-brown or fox-red median 
area (formed nearly as in the neighbouring species) represents pretty closely the rufescens form of the truncata 
group. The size, the form of the post-median and the very sharply and contrastingly marked underside — dark- 
grey to the postmedian and at the apex of the forewing, with a whitish band interposed — should render su¬ 
perba easy of recognition. 
C. latefasciata Stgr. (Ilf) is now fairly well known and the confusion which Staitdinger himself intro¬ 
duced (by mixing with it broad-banded aberrations of truncata) has been eliminated; little remains, therefore, 
but to provide a figure; Vol. 4, pi. 13 c which, through a similarity of name, got quoted to latefasciata in the 
German edition, has of course nothing to do with it, but (as p. 245 of that volume shows) represents C. (Tricho- 
plites) latifasciaria Leech. Far more misleading, because less easily detected, was the substitution by the trans¬ 
lator, at the beginning of line 4 of the description, of “schwarzen Punkt" for “white spot’ 5 of the English edi¬ 
tion; as Heydemann truly says, this white spot (Fleck) is especially characteristic of the species. Nordstrom, 
who first recorded latefasciata from Sweden, has an excellent article on its range and variation; it occurs in 
Norway (Oda-len, 1 example), Sweden (well distributed), Est-land (Reval), Leningrad and S. Siberia (Irkutsk 
to Nikolaievsk). — ab. rufescens [Heydem.) Nordstrom, with median band yellowish or rust-brown, — ab. mixta 
Heydem., connecting rufescens with perfuscata , — ab. perfuscata [Heydem.) Nordstrom , with the median band 
more or less strongly powdered with grey-brown, and — ab. nigerrimata [Heydem.) Nordstrom, a handsome 
form with the forewing almost uniformly blackened, although the white ant-emedian spot at the liindmargin 
nearly always persists, are all demonstrated to occur in Sweden; their nomenclature follows Heydemann's 
system of nomina collectiva. — The larva feeds on Vaccinium myrtillus and is said to be nearer to that of citrata. 
than to that of truncata. The pupa is the darkest of the 4 Swedish Dysstroma and is distinguishable from the 
others — judging from one example — by the more strongly developed, slightly bifid central spikes of the 
cremaster. 
C. imitaria Heydem. (11 g) seems to have been earlier confused with citrata but is really — notwith¬ 
standing its projecting postmedian and its glossy white hindwing — nearer to truncata-, the latter is a good 
recognition-mark for the species, though the angle of its postmedian (scarcely shown on the upperside) is about 
as acute in citrata. Koko-Nor, the type series, distributed in many collections; also from Sunpant-ing, Szechuan. 
The type form has the median area coloured as in truncata. — - ab. perfuscata Heydem,. has the median area of 
the forewing densely dusted with dark-grey, the basal and distal areas also darkened; hindwing remaining 
glossy white, only towards the termen darker. — ab. rufescens Heydem,. Roughly parallel to the like-named 
form of truncata, but here of a weak, greyish, light ochre-brown colour, with the costal streamer between 
median and postmedian line and into the anterior part of the outward projection brown. Type a fine Koko-Nor 
