84 
LITHOSTEGE. By L. B. Prout. 
cinerata. 
'palaesti- 
nensis. 
griseata. 
infuscata. 
stockli. 
dupHcaria. 
zern yi. 
fissuraia. 
latesirigata. 
ignorata. 
noiata. 
biermis. 
buxtoni. 
arvensis. Further, griseata normally appears some 8 or 10 days earlier in May and disappears with the first 
half of June, while farinata lasts till the end of that month or just into July. Still more recently, Amsel has 
given a differentiation of farinata, cinerata, palaestinensis and griseata by the genitalia. 
L. cinerata Trti. (= cyrenaica Amsel) (8 f). Originally recorded, with a query, as griseata, this was 
afterwards recognized as a good species, “larger than griseata, apex more acute, termen less rounded”, etc. 
Actually it seems to come almost closer to farinata, though somewhat less pure white and often showing some 
trace of the marking of griseata. The specimen kindly lent us by Count Turati for figuring is more griseata- 
like than any other which I have seen, but there occur gradations to individuals which might easily pass for 
farinata. Described from Cyrenaica, but apparently distributed also in Tunis and Algeria. 
L. palaestinensis Amsel (8 f). Distinguishable from griseata by the blue-grey gloss of the forewing 
and the strong darkening of the underside of this wing, reaching to beyond its middle. Constant differences 
in the genitalia show that it is a good species; juxta strongly tapering to its extremity (in griseata and cinerata 
continuing broad), “clasper" (central armature of valve) essentially narrower than in griseata, longer than in 
cinerata. Palestine (distributed) and Mesopotamia, February to April. 
L. griseata Schiff. (Vol. 4, p. 172). For some comparison of the habits with those of farinata, see under 
that species. The type form was the most farinata- like one — “unicolorous, light-grey” — but can be taken 
to include the forms in which the apical dash of the forewing is well developed or at least indicated. Even 
those in which this dash is continued as a line across the wing do not as yet seem to have been separately 
named. — ab. infuscata Ev. (= brunnescens Strata) (Vol. 4, pi. 6 d, as griseata) is the equally weakly marked 
form with the ground-colour of the forewing “wholly pale brown, which is only darker at the outer margin” 
(Eversmann, on Sarepta specimens) or “light grey-brown” (Skala, on Moravian); transitions occur. — ab. 
stockli Pillich (= grisearia Him., nec griseata Schiff.) is a much rarer form, with a median line also strongly 
developed on the forewing, in Pillich's type — which has been kindly lent to me by the Hungarian National 
Museum — even sharper than the outer line. — ab. dupHcaria Hbn. = (duplicata Hbn.). In describing this 
puzzling specimen, only known from Hubner’s figure (208), I missed mention of the most remarkable pecu¬ 
liarity, the double median line. Were it not for the express statement of Herrich-Schaeffer that 
a note in Hr bner's own handwriting says the specimen was taken in Berlin, I should have regarded it as 
an aberration of the variable coassata. for which it would be the oldest name and with which it was iden- 
tifiecl by the earlier authors, probably at first including Hubner himself. It lacks, however, the dark ante- 
median and the whitish subterminal of most of the strongly-marked forms of coassata. — zemyi subsp. nov. 
(— duplicaria Zerny nec Hbn.) (8 f). This strongly marked form, with the antemedian line developed, the 
postmedian line and subterminal shade separate, at least anteriorly, is treated by Zerny as a race in the 
Albarracin district, taken sparingly among Sisymbrium in May. Elsew r here (if indeed the similar forms from 
other localities entirely match it) only a rare aberration. 
L. fissurata Mab. (Vol. 4. pi. 11 b). Rebel has recorded this from the Sahara and the Tring Museum 
has it from Amgid (ca. 26 IJ 30” N. lat.) and from Sidi Mesri, Tripoli. The egg, according to Chretien, is 
ellipsoid, with a large but shallow depression (or sometimes mere flattening), polygonal reticulation small, 
confused and irregular, colour white. 
L. bosporaria H.-Sch. (Vol. 4, pi. 12 c) latestrigata Rbl. (8f). Stripes of forewing broader, especially 
the outer two; the antemarginal one not thickened costally; hindwing more whitish. Angora, May. 
L. usgentaria Christ. (Vol. 4, pi. 11 b) ignorata Stgr. (8 g). We figure a $ from Margelan, S. Ferghana, 
which by the brown hindwing, etc., has been referred to this race; it is, however, scarcely larger than the 
specimen already figured as usgentaria , which may be also an ignorata or transition. 
L. notata B.-Haas (8 g). Rather widely distributed in N. Africa -— southward to the Ahaggar Moun¬ 
tains, eastward to Bengasi. 
L. biermis Prout (8g). Foretibia with both the claws highly developed, though the inner, as usual, 
is much the longer. Antenna thickened and lamellate, noticeably more so than in Cli. legatella $ (Vol. 4, 
pi. 6 b), to dark specimens of which (or to Ch. Isabella , 8 h) it rather closely approximates in coloration, though 
not in shape or markings, which latter more recall those of notata. The brown veins of the distal area of the 
forewing, dotted with black between the postmedian and subterminal, and the strong teeth of the subterminal 
in its posterior half are rather characteristic. Casablanca, Morocco, only the type $ known. 
L. buxtoni Prout (8 g) differs from all the foregoing in the rather long ciliation of the antenna. Also 
easily recognizable by the markings, though evidently variable. The type <$, from Kangavar, Hamadan, 
N. W. Persia, 5000 feet, here figured, is much less dark and the outward teeth of its line less prolonged than 
in the only other then known example, a from Shergat, Asshur, Mesopotamia. Flies in 1 ecember. 
