ADDENDA AD GIN DARIA. By L. B. Prout. 
truncata 
angusti- 
fasciata. 
rufescens. 
imitaria. 
citrata. 
corussaria. 
hemiagna. 
carescotes. 
246 
p. 116. to C. truncata Hufn. Groth has continued his valuable researches into the workings of heredity 
and published a supplementary memoir (Flora og Fauna 1937. part 4). A peculiarity on which attention had 
not previously been focussed is that the markings of the median area entirely or almost entirely disappear as 
soon as at least two colour-factors (genetically) are represented in one individual and that this holds whether 
the two factors are alike or unlike. Thus in rufescens , lor instance, the homozygote and the heterozygotes 
(rvfescens + perfuscata, etc.) have the median band respectively of a brighter, clearer yellow, or (fuscorufescens) 
a browner colour (in either case without the dark lines and cell-mark) than the uncombined heterozygote. It 
is also established that the homozygotes are more delicate and oftener sterile, a natural barrier to the origination 
oi new subspecies within a mixed population. ab. angustifasciata Groth is an interesting form or “mutation 
with the characteristic colouring of the median band confined between the innermost lines of that area, the 
distal and proximal contour of the area being lost. It was obtained in a brood in which the mortality was ex¬ 
tremely high, only 6 being reared from 94 eggs. The father was a normal rufescens. the mother a modification 
oi perfuscata with narrowed band; of the offspring (all rufescens. sens. lat.). 4 (3 1 $) were strikingly narrow- 
banded, the other 2 (both $) following the father. Groth proposes to call the two variants thus far known 
‘ "perfu.scata-angustifasciata ; ’' and ‘‘ rufescens-angustifasciata''. 
p. 117, to C. truncata sinensis. ab. rufescens (Heydem.. nom. coll.) Djakonov. Very similar to imitaria 
ab. rufescens (p. I BS above), but the hindwing not pure white, as in that species, but darkened, particularly 
in the basal and distal areas; forewing also darkened as compared with typical sinensis, and mixed with rust- 
reddish in the median area. 8. Kansu: Kung-ta, ca. 2850 m. 
p. 118. to Co imitaria Heydem. A much damaged $ from the Tsaluk Valley, Min-shan (S. Kansu, ca. 
3000 m). representing a small, dark Dysstroma with apparently light, unmarked hindwing, uniform dark median 
band (only a little lighter near the costa), with distinct distal projection, and likewise strongly darkened basal 
and distal areas, has a similar bursa to that of imitaria and almost identical lamina dentata: thus, in spite of 
some small deviations in detail from the structure figured by Heydemann, it may probably be a dark mountain 
race of this species. 
p. 119, to C. citrata L. Like many other normally single-brooded species, this can, in quite exceptional 
circumstances, yield a second generation. Groth records a family which, bred under artificial conditions of 
temperature, produced ova in June and July whereof several hatched in at most 19 days; the larvae fed up 
rapidly and the imagines appeared in August to early September. One or two cases of later autumn emergence 
have recently been recorded. 
p. 122. to C. corussaria Oberth. Studying the W. Chinese representatives of this species in preparation 
for Vol. 12, I learn that their somewhere strange facies, when compared in long series with the true corussaria. 
is supported by structural modifications and it has become necessary to erect the following two new species. 
So far as I now know, the range of corussaria can only be given as Palaearctic. East Asia, with S. Saghalien 
and Japan. 
C. (Dysstroma) hemiagna sp.n. (= ab. punctumnotata [maxim, part.] Heydem.. Prout) (13 g). On 
an average larger, the sometimes reaching 44 mm. Almost invariably white-banded, the grey irroration 
less distributed, postmedian dark costal shade relatively narrow; particularly striking is the e n t i r e absence 
of irroration on a more or less extended area between the (almost always minute) cell-dot and the posterior 
part of this costal shade; the bright brown colour beyond this shade often extended across the subterminal, at 
times almost to the termen. The antemedian shows a strong tendency to make an additional, pronounced curve 
or angulation outward at and just behind the subcostal vein; the dark hindmarginal spot or suffusion of the 
median area is often weakened or almost obsolete. Uncus not so pronouncedly “spoon-shaped" as in corussaria. 
valve with the “costal" (dorsal) margin almost straight to before the process (in corussaria. as noted by Heyde- 
marn. here markedly ventricose); saccus with much deeper curvature but possibly (as in the following) in con¬ 
stant. Ta-tsien-lu and district, a very long series from the Oberthur collection; others from Tchang-kou (Tibet) 
and a $ from Tay-tou-ho. 
C. (Dysstroma) carescotes sp. n. (vix pr. f. ?) (18 i). Tegumen more square-shouldered at base of uncus 
than in the two preceding, uncus with the “spoon-shaped" extremity, valve with the dorsal margin essentially 
as in hemiagna but the ehitin-tooth shorter: saccus in one of the 3 examined (Ta-tsien-lu) very shallowly in¬ 
curved. in the others intermediate or nearly as in hemiagna. Forewing with no b r i g h t brown, the brown 
part of the apical patch, in particular, almost entirely overlaid with blackish; basal patch 
(or at least its subbasal part) dark; dark posterior shading of median area always more or less developed; dark 
postmedian half-band on the whole not narrowed, its teeth at and behind the 1st radial generally lengthened. 
Otherwise extremely similar to hemiagna. Ta-tsien-lu and district, a few $<$. including the type; Siao-lu. 2 
and 1 $. All from the Oberthur collection. 
