134 
CIDARIA. By L. B. Prout. 
nubilaia. 
olbiaria. 
sericeata. 
holli. 
didymata. 
lutescens. 
albidissima. 
brockenensis. 
cuneigera. 
fremonti. 
nigra. 
rebeli. 
aitenuata. 
qcdrensis. 
early September at Bejar (Salamanca), is found near houses and among bushes; flavolineata in October (Anda¬ 
lusia) in arid and desolate places. Smaller; antennal pectinations moderate, etc. 
C. multistrigaria Haw. (Vol. 4. pi. 9 c) ab. nubilata Tutt (12 h). We figure a rather extreme £ from 
Skelmanthorpe. olbiaria Mill. (= olbiana Culot) (12 g, and h 9). On an average considerably larger than 
name-typical multistrigaria, not always more weakly marked, but always very different in aspect on account 
of the white or white-grey, not brownish tone. It sometimes continues into February or even into March. The 
Pyrenees should be added to the range given in Vol. 4. — sericeata Schwingenschuss (= olbiaria Kitschelt, nec 
Mill.) has scarcely any connection with the preceding. While that is larger, paler and rounder-winged and 
has the lines dissolved into dots, sericeata — though also somewhat rounder-winged than the type — is in 
the smaller (at least as small as the §), both sexes white-grey with a characteristic silky gloss, markings less 
sharp than in M. multistrigaria, without a trace of the vein-dots; $ shaped almost as in the <$, sometimes a 
trifle narrower-winged, perhaps as in the male of multistrigaria. As it was bred in June-July and the sexual 
dimorphism is so slight, it is suggested that it may be a separate species, but in a state of nature it was only 
found in the late autumn. S. Tyrol (Arco and Mori) and Monfalcone. holli subsp. (? sp .) nov. (12 h). In 
size, sexual dimorphism and time of appearance (October and November) similar to olbiaria, the wings perhaps 
relatively a trifle ampler. Very different in its glossy light-brown colour (considerably browner than in multi¬ 
strigaria), the markings weak, the dark vein-dots, though present, not nearly so pronounced as in olbiaria; 
occasionally the median area of the forewing is appreciably darkened, or its boundaries are rather well defined. 
I have before me 9 $<$ and 1 $ from the Blida Glaciers, including the type, besides 1 <$ from Guelt-es-Stel (all 
ex coll. Holl, who erroneously determined it as multi punctata, see below); also a splendid series from Lambese, 
collected by H. Powell. As the genitalia differ slightly from those of multistrigaria and olbiaria, it may have 
to be treated as a species. 
C. didymata L. (Vol. 4. pi. 9 c, <J). <$$ from the Faroe Islands are often dark and with a blurred ap¬ 
pearance, but have not received a separate name. We here add (pi. 12 i) a figure of the $ form which is con¬ 
sidered typical; Linne's type $, described as “whitish with 2 obsolescent cinereous bands; a bilobed fuscous 
spot distally”, was (as too often!) only given as from “Europe”, but was collected by Solander and may be as¬ 
sumed to have come from Sweden or Lapland. In worn specimens the markings tend to become weak, and 
the subordinate ones would certainly have been overlooked or ignored in a brief Linnean diagnosis. It is pos¬ 
sible, however, that the actual type approximated more nearly to albidissima. — In any case, the warm ochre- 
ous-brownish $$ of the lowlands seem to need a special name, ab. loc. lutescens nov. (12 i). Type a $ from 
Tring in Lord Rothschild's Museum. I have been accustomed to take these ^-forms almost exclusively in 
the woodlands and hedgerows of southern England, the paler ones in the North (with Scotland) and on the 
moorlands of Wales, Devonshire, etc. According to Boldt, didymata larva feeds chiefly on Vaccinium myr- 
tillus, only occasionally on Rumex acetosella or Umbelliferae; but this observation can only refer to certain 
districts, although these are admittedly among the ones where the species is the most abundant. — ab. albi¬ 
dissima Strand, a single $ from Overhalden, is described as dirty white, the hindwing unicolorous, the forewing 
with the median area narrow, weakly indicated in grey-yellowish, its proximal boundary marked by a slender 
darker band. Assuming that the “twin” spots of the forewing are also present, together with faint indications 
of the other markings of the distal area, this would represent accurately the $$ which I have collected in Aber¬ 
deenshire, but which come so near the Linnean type as scarcely to require a distinctive name. — ab. brocken¬ 
ensis Strand , founded on a single $ from the Brocken (Harz Mountains), has the markings much greyer (grey- 
black to pure black), without the usual brown tone, at least in the marginal area with a bluish tinge. — ab. 
cuneigera Balfour. Rather large and pale, with a conspicuous dark fuscous arrow-head marking, formed by 
a wedge-like extension basewards of the twin spots. A single $ from Whittingehame, East Lothian. — ab. 
fremonti Rondou. Larger and much darker than the type, the “twin” and subapical spots black, the sub¬ 
terminal strongly white throughout; dark border of hindwing not separated from the lighter part by any visibly 
darker line. Gedre, 1 example, presumably a Culot figures a similar but less outstanding one from Liebenau 
at fig. 555. — ab. nigra Prout (Vol. 4, p. 231) is not confined to Scotland; a large C from Great Missenden, 
Buckinghamshire, in the collection of the late R. Adkin, is absolutely melanic except that, on close attention, 
slightly ochreous-tinged suffusions are discoverable at the base and about the radials of the forewing distally. 
rebeli Wnukowsky ( = hethlandica Pbl. nec Prout, hetlandica Culot) must be used temporarily for the Shet¬ 
land race, until Xanthorhoe and Colostygia are given generic rights. — $-ab. aitenuata Culot is a somewhat 
extreme aberration of the small, pale northern forms of this sex, “bone white, the markings reduced to some 
vestiges on the forewing” (hardly more than ante- and postmedian line and twin spots), hindwing without 
markings. Tring Museum has a similar $ from Kincardine, less dwarfed, the antemedian line less feeble, per¬ 
haps referable to albidissima. — gedrensis nom. nov. (= pyrenaeata Bubacek, nom. praeocc.; cf . aqueata). $ 
dark grey without brownish tone, strongly coloured and marked; $ pale yellowish grey. Gedre district. If 
this is really a subspecies it requires the new name; if the reference is merely to an ordinary mountain form, 
it might sink to brockenensis Strand. 
