ADDENDA AD ORTHOLITHA. Bv L. B. Prout. 
235 
outer band present. This and the two following came also from Berlin. ah. latifasciata Obraztsov differs from 
bifasciata in that the outer band is much broadened, so as to reach the fringe. ab. confluefasciata Obraztsov. 
The two bands of the underside coalesce, so as to form a single broad band in the middle of the wing. sordidaria 
Zell. I have pointed out under purpuraria ab. rubrilinearia that the name sordidaria has been misapplied. 
Evidently, as Hbydemann indicates, it represents a spring-brood form, but it is quite likely that this may be 
the only form in its northerly habitat — Lycksele, S. Lapland. 25—27 June — and not impossible that it may 
be a separable subspecies. 
p. 74, to 0. coarctaria. infuscata Stgr. (see Vol. 4, p. 158). To judge from a good series, mostly in 
the Tring Museum, this seems also to be the principal, or perhaps the only, form in parts of Asia Minor. It 
was, indeed, erected as “var." (i. e. subspecies), not “ab. ", in the “Catalog” of 1871, and the material from 
Isparta, Anatolia, entirely bears this out; S. Turkey and Bithvnia were originally given as localities. The dark¬ 
ening of the hindwing and underside, without the yellowish admixture of the more typical forms, is perhaps 
more distinctive than the changes in the forewing. Warnecke adds Sylt to the range of this dark form. 
p. 75. to 0. mucronata plumbaria. — ab. loc. nigrita Heydem. Definitely nigristic, thus having having 
“nothing to do with the rare f. luridaria which is uniformly washed with blackish; in nigrita the dove- 
grey ground-colour is densely s p r i n k 1 e d with black-grey scale s. Am rum. 
both sexes. 
0. sterilis sp. n. (17 f). Forewing less ochreous than in langi (Vol. 4, pi. 11 a), sometimes almost grey, 
median band on an average broader, cell-dot conspicuous, often followed posteriorly by a second, smaller dot. 
postmedian line appreciably more sinuous, termen not darker than the rest of the distal area, some darkish 
shading proximally to the subterminal line, on the contrary, at times well developed, terminal dark line very 
slight, often virtually obsolete, fringe on the whole less brown than in langi , its dividing line scarcely ever conti¬ 
nuous. Hindwing with the lines better developed than in most langi. N. Persia: Hashtar, Demavend, ca. 
2500 m, August and September 1935 (F. Fusek), 2 $<$. 12 2$ in the Tring Museum. Median band variable 
in intensity, at times little darkened except at its edges. As the wings (or at least the hindwing) look very 
slightly broader than in langi. it is probable that sterilis is a separate species; in any case an extremely dis¬ 
tinct. form. 
p. 75, after O. moeniata: 
0. obvallaria Mab. (Vol. 4, pi. 0 h). The young larva, according to Reisser, is dirty greenish grey with 
6 fine dark lines and black head. After the 1st moult: head dark grey-olive with 2 lighter stripes; skin slightly 
wrinkled transversely, body with dark longitudinal stripes, a light subdorsal band, the slight lateral flange 
somewhat macularly darkened. It feeds on various Genista species but perished during hibernation. 
p. 75, to 0. proximaria Rmb. (7 g). On an extensive series from Sardinia, Bytinski-Salz has made 
an analysis of the variation. The type form has 3 distinct dark bands: the nearly linear subbasal and the proximal 
and distal boundaries of the median area. The basal area, the space between first band and median area, the 
middle of this area and the space between 3rd band and subterminal are clear grey. — ab. basiconfluens Byt.- 
Salz has the basal dark band and the antemedian confluent in the middle. - ab. omniconfluens Byt.-Salz. All 
3 bands joined together by bridges. Only a single $ yet. known. ab. mediofasciata Byt.-Salz. Median area 
formed into a solid dark band, as in peribolata ab. jodnnisi. Various transitions occur in all the localities. 
0. caucasica Niesioloicski. Fore and hindwing light ash-grey, all the lines of the forewing black-brown: 
2 small black dots in the light area of the median band. Subterminal lunulate. proximally dark-bordered. 
Fringes spotted with black-brown (on the hindwing only on their proximal half). Hindwing weakly, yet quite 
distinctly marked. Antemedian line of forewing formed of 2 large lunules and 1 small. Postmedian very char¬ 
acteristic, making in the middle a sharp, almost quadrate projection, behind which it is deeply incurred; this 
line is formed as in proximaria Rmb., from which caucasica is quite different in the distal area, the chequered 
fringes, etc. Central Caucasus, 2400- 2500 m. the type $ from the Karaugom. 
p. 76, after O. kashghara: 
0. similaria Leech (Vol. 4. pi. 11 a). Either this or (perhaps more probably) s. erschoffi Alph. (t. c., 
pi. 8 c), if the latter be really separable, occurs in S. Kansu, at 2600—2750 m; according to Djakonov the 2 
known 2$ from Sven Hedin’s expedition have the white subterminal band rather broad and clear, cell-dot 
in 1 $ single, in the other double. 
p. 76, before O. subvicinaria: 
0. elbursica Byt.-Salz & Brandt (17 f) is considered to be nearest to subvicinaria but distinguishable by 
-the straighter lines (excepting the sharp angulation of the proximal ones near the costa), differently shaped 
tat ifasc iota, 
confine jas- 
data 
sordidaria. 
infuscata. 
nigrita. 
sterilis. 
obvallaria. 
proximaria. 
basicon¬ 
fluens 
omni¬ 
confluens. 
mediofas- . 
data 
ca ucasica. 
aim ilaria. 
elbursica. 
