ORTHOLITHA. By L. B. Prout. 
the article to which I have already referred. The genitalia are discussed and figured and show slight differences 
in the uncus. — ab. multistrigaria Heydem., prevalent about Rendsburg and on the North Frisian Islands, multislriga- 
is the most variegated form known, the forewing showing 4, the hindwing 2, strong white lines on an unevenly 
darkened ground. — ab. pseudoliniitata Heydem., from Holstein and Hanover, has the ground-colour strongly pseudolimi- 
ochreous yellow-brown, so that it more or less strongly recalls dark specimens of chenopodiata . — ? f. teratolog. 
solitaria Albrecht (7 f) must be mentioned here. It deviates not only in the malformed wings, which (as in occasional solitaria. 
monstrosities in other species) are greatly shortened and rounded off, but in the somewhat more firmata- like 
tone of colour and — more surprisingly —in some details in the genitalia. Dr. Wehrli, in an exhaustive article 
(Ent. Zeitschr., Frankfort, Vol. 46), very ingeniously argues that it is a natural hybrid between mucronata and 
Gidaria (Thera) firmata, sharing the characters of both; in spite of the “million-to-one” chance against the 
success of such a crossing under natural conditions, one dare not say that this is an impossible ex¬ 
planation of its arrival at maturity; in any case, the abnormal venation (1st subcostal of forewing free, leaving 
only a single areole, discocellulars of both wings somewhat distorted), as well as the modifications in the pattern 
(forewing with cell-mark larger, more elongate, ante- and postmedian lines closely approximated, the latter 
more strongly bent near the costa, etc.), are easily accounted for by the altered wing-form, although this ex¬ 
planation is somewhat less satisfying when applied to the striking prolongation of the cells (both wings). 
The antenna is said to be “strongly bipectinate to the extreme apex”, which would not really agree with 
mucronata, but would be still less applicable to firmata. The unique example was captured at Forbach. Lor¬ 
raine, on 12th June 1910, and published in 1920 as the type of a new genus Forbachia, subsequently withdrawn. 
0. chenopodiata L. (Vol. 4, pi. 6 i). C. Schneider, of Cannstadt, has recorded that the eggs are laid chenopo- 
unattached on the ground near vetch; lie obtained about 100 from captured $$ and found that the larvae, diata. 
which hatched in about a fortnight, accepted only Vicia tetrasperma out of the plants offered and ate only 
the uppersicle of the leaves; they hibernated in the 3rd instar. — ab. grafi Jould is only known to me from grafi. 
Sterneck's references (Prodr. Schmettfaun. Bohmens, p. 163) and its exact relation to other darkened forms 
is uncertain; unless it can be identified with monodii Th.-Mieg (7 f) (as Sterneck suggests) or with grisescens 
Hormuz., it will perhaps have to replace the following, over which the name has 3 years’ priority. “Forewing 
darkened, bands and distal margin black-grey, markings indistinct, hindwing dark brown.” Founded on a 
specimen from Hredle, near Zdice, Bohemia. — ab. (montic. ?) fumata Nitsche. As this name has obtained fumata. 
some currency for the more or less darkened form which is prevalent in some mountain districts, at least in 
Austria and Bavaria, I give Nitsche’s account in more detail. Near Aflenz, Upper Styria, among O. cheno¬ 
podiata, some struck him as particularly dark and seemed also smaller and with less pointed wings than the 
type. They were taken in mid August 1909 and again in 1912 and were considered worthy of a separate 
name. Whether ab . obscurior Heinrich (1917), from Spandau, belongs with this or with unicolor Th.-Mieg 
(Vol. 4, p. 159) or grafi Joulcl is not made clear by the brief description, in any case probably not monodii 
(7 f), as the forewing is “more unicolorous” than is normal. The naming of dark forms in this species, without 
reference to those already known, has manifestly proceeded too far. — ab. plurimelineata Stauder, said to be plurime- 
prevalent in the Salzkammergut, has all the subsidiary lines of the forewing and the postmedian and first 
subterminal of the hindwing accentuated. — ab. insigniata Osthelder, from the South Tyrol, shows the opposite insigniata. 
extreme, with the markings of the forewing, excepting the basal and median bands, obsolescent or even entirely 
wanting. — sibirica B.-Haas (7 f). We figure a $ of this race from the Apfelgebirge, Transbaikal. sibirica. 
O. moeniata Scop. ab. loc. diniensis Neuburger (7 g). As supplemental to our figure in Vol. 4 (pi. 6 i, diniensis. 
fig. 6), which represents a fairly large $ of the name-typical dark form of moeniata as it occurs in Central 
Europe from Alsace to Transsylvania, Ave give an illustration of the fine large diniensis of S. France. As 
Wehrli has pointed out, S. French moeniata have the hindwing and the proximal and distal areas of 
the forewing much more weakly marked, but split into two colour-forms, with occasional intermediates. 
- ab. loc. lantoscana Wehrli (7 g) has the ground-colour purer white-grey, without the yellow-brownish tone lantoscana. 
of diniensis. In the Maritime Alps this form was observed more particularly on the open, rocky slopes, 
diniensis in a light wood at about 1500 m altitude. Whether the same holds in the St. Baume district and 
in Italy, where similar forms occur together, is not yet recorded. — carsicola Stauder (7 f) is a small pale earsicola. 
form, sometimes only about half the size of the largest examples of lantoscana, which otherAA r ise it resembles 
in its ashen ground-colour and reduction of markings. Inner Istria, on a plateau N. E. of Rakitovic, at about 
1000—1200 m altitude, local and rather rare. 
% 
0. proximaria Rmb. (7 g). Notwithstanding that much good collecting has been undertaken in Corsica proxima- 
of' recent years, this species remains a rarity. We give a figure. 
0. peribolata Hbn. A specimen taken at Westward Ho (N. Devon) many years ago has recently been peribolata. 
determined as this species, new to Britain. No exact particulars regarding its capture are available and I 
suppose it to have been an accidental introduction. — ab. staudingeri Th.-Mieg (= coarctata Prout) (7 g). staudingeri. 
