CIDARIA. By L. B. Prout. 
119 
$ from the Pungeler collection; a second $ known from Sunpanting. — ab. mixta Heydem. is a mixture of mixta . 
the two preceding aberrations, the median area at the costa being broadly irrorated with grey-black, often also 
with the ochre-brown almost entirely suppressed by grey intermixture. A number of examples known. The 
genitalia of the q and the $ resemble respectively those of truncata and of citrata. 
C. infuscata Tgstr. (= schneideri Sandb.) (Ilf) is now well known and we give a figure. The forewing infuscata . 
is, as Tengstrom indicated, slightly more rounded at the apex than in the allies, the termen being a trifle less 
oblique anteriorly; the size in both sexes is moderate to rather small; the tone rather characteristic, generally 
with a dirty-yellowish or more olivaceous tinge, the distal area of the forewing with a good deal of blue-grey 
irroration; the rust-coloured bands not very conspicuous, in some forms entirely suppressed; hindwing rela¬ 
tively dark. It inhabits peat-moors and bogs in Northern Europe and Siberia, the name-typical race perhaps 
not extending eastward of the Ural. Sandberg described his schneideri on ample material from Arctic Norway 
and it is accepted that his type-form was nearly the same as Tengstrom's. Nordstrom points out that I mis¬ 
translated “e n s a r t e t blaagraa" as “b 1 a c k i s h blue-grey" instead of u n i f o r m blue-grey and conse¬ 
quently made an incorrect attempt to recognize in it truncata ab. nigerrimata. — ab. olivescens ( Warr.) Prout olivescens . 
( = olivacea Prout), founded in 1908 on 2 specimens from “Lapland” and 1 from “Finland”, all in the British 
Museum, is a more olivaceous form, the inner ferruginous band in the originals wanting, the outer one dull, 
interrupted, inconspicuous, being also dusted with dark scales. — ab. centumnotata Nordstrom has the median centumnoto - 
area of the forewing bone-yellow, little dusted, and is the only definite indication yet known of parallel variation 
with that of the truncata- group. — nyiwonis Matsumura is, according to Heydemann, the Saghalien race of nyiwonis . 
infuscata and is not at present considered differentiable from the Siberian forms, chiefly from Transbaikal, 
which he quotes under the same name. Darker grey, the forewing without the blue-grey or olive tone of the 
western forms. — The larva of infuscata feeds on Vaccinium uliginosum; I know no detailed description of 
it. Single brooded, the perfect insect appearing in June or July. According to the latest views, it is a northern 
representative of the volutata-incolorata group and not, as was formerly supposed, a member of the truncata 
group. 
C. psodoidaria Heydem. (Ilf). A small species (length of a forewing in both sexes 14—15 mm) with psodoidaria . 
a characteristic aspect, somewhat suggesting to its author a very light Psodos. Structurally a link between 
volutata and infuscata nyiwonis. Forewing black-grey mixed with whitish and with blue-grey irroration, the 
postmedian with the characteristic anterior indentation of the succeeding three species, but here followed by 
a longer outward projection. Hinclwing snow-white, more or less dusted with grey. Chinese Tibet, Tschang-kou 
and Ta-tsien-lu. 
C. volutata Prout (11 f) remains very rare and only certainly known from Koko-Nor, and in the male volutata. 
sex, but a very worn $ from Siao-lou may belong to it. 
C. incolorata (Warr., MS.) Heydem. (11 f). described from specimens collected at high altitudes in Sikkim incolorata. 
(3000—4000 m), has since become known from Chinese Tibet (Wehrli collection, 3 from Dejean, also a 
few in the British Museum), so that it requires mention in the present volume. A rather large and long-winged 
species, with more rounded apex than volutata, the coloration and markings similar, the dark markings more 
blackish, some black costal spots and three characteristic wedge-spots in the postmedian band noticeable; 
cell-dot not, as in volutata, strigiform; hindwing less white than in that species. 
C. pseudimmanata Heydem. (= pseudoimmanata B.-Haas) (11 f). In its general aspect black-grey, pseudimma - 
with two sharp yellow-brown bands. Forewing with basal area brown-grey, its distal half black-grey, clentate- 
edged; the broad subbasal band terminating in a large yellow-brown spot posteriorly; median band broad, 
black-grey sprinkled with white, the cell-spot distinct, the distal projections as strong as in citrata-, subter¬ 
minal indistinct, except where bounded with black spots or wedges. Hindwing wholly dusted with grey, the 
cell-dot and postmedian of the underside showing darker grey. Fore wing beneath dark to the postmedian line 
and in the apical region, hindwing with the cell-dot large, the postmedian strong, angulated, grey-dusted. 2 
1 $, all believed to come from Borochojewa, Malchan Mtns., Transbaikal, received as citrata, but considerably 
different in the genitalia. 
C. citrata L. (Vol. 4, p. 221). The lost Linnean type, accepted as being really Swedish, has been cleverly citrata. 
“restored” by Heydemann from the original description and comparisons and a rough sketch of the result 
published which could not well represent any known Swedish species except the present one. The “large whitish 
spot“ towards the distal end of the costa is of course conclusive against truncata and probably against all pos¬ 
sible rival claimants. The exact form intended is less easy to gauge, but I fully accept the conclusions of Heyde¬ 
mann and assume the name-type to be the almost uniformly (excepting the costal spot) grey-dusted form, 
which is not rare in Scandinavia. It is, I trust, unnecessary in the present stage of our knowledge to give in 
extenso the distinctions from truncata which have been demonstrated or hinted at by different authors; excellent 
parallel tabulations of the chief have been published by Heydemann in his recent articles. It may be well, 
however, to repeat his warning against too great confidence in a venational difference pointed out by Zollner; 
