GRAMMOCHESIAS; LITHOSTEGE. By L. B. Prout. 
83 
to appear in Vol. 4. Most districts have at least each a predominant form, so that the designation “sub¬ 
species” is not inapplicable, even though other forms may occur therewith as aberrations. The type locality 
of the form decussata is unknown, as Schiffermuller did not describe it from his own collection and the 
Vienna form is subsp. fortificata. In France, decussata is said to be the constant form at Beuil (AlpesMari- 
times, 1450 m). — transiens Stauder, said to constitute a race in the Trieste district, is almost synonymous transiens. 
with decussata , somewhat intermediate towards dinarica. Stauder himself had earlier treated the form as 
typical, erecting — ab. praeclara Statider (8 e) for a pretty form from the same locality (Opcina) with the praeclara. 
white element broad and clean. — ab. marginata Stauder, also from Opcina, has the subterminal of both wings marginata. 
almost or entirely obsolete, so that the area from the white postmedian to the ter men is uninterruptedly 
dark. — fortificata Tr. (8 e) belongs not only as a fixed race to Hungary, but also to Vienna, etc. (see above), fortificata. 
Moreover the form in the Pyrenees (near Lugagnan) is said to agree entirely with this. — dinarica Schawerda dinarica. 
is a large form with the markings much darker than in decussata, typically almost black, the white 
ground colour sharply contrasting. Herzegovina (loc. typ.) to Albania, variable, some individuals scarcely 
distinguishable from well-marked d. decussata. — ab. infuscata F. Wagn. (8 e) is the most extremely infus- infuscata. 
cated form of dinarica; described from Herzegovina. — rumelica Rbl. <b Zerny, founded on specimens from rumelica. 
Sliven (Bulgaria) has both sexes much purer white than in any other race, the dark markings particul¬ 
arly sharp. 
S. nubilaria Hbn. (Vol. 4, pi. 6 d). A report of this East European species from France (Amat. Papil- nubilaria. 
Ions, Vol. 1, p. 65) cannot be taken seriously, especially as two other S. E. Russian species were said to have 
been taken at the same time. — exalbata Hbn. (Vol. 4, pi. 6 d). Sheldon remarks that at Sarepta this flies exalbata. 
with Siona lineata and looks very similar to it. 
17a. Genus: Grammochesias gen.nov. 
Face moderately smooth. Palpus extremely short, rough-scaled. Tongue developed. Antenna simple. 
Hindtibia with the spurs short. Abdomen in $ elongate. Wings strongly elongate. Forewing with the cell 
long (well over %); discocellulars very weak, particularly in the <$, 3rd discocellular bending sharply at end 
of posterior arm of cell-fold, becoming extremely oblique; areole double; 1st median connate or shortly 
stalked with 3rd radial. Hindwing very shallowly sinuate between 1st radial and 1st median; cell over y 2 , 
2nd discocellular oblique outward, 3rd inbent, becoming very oblique outward; costal in $ anastomosing to 
near end of cell, in $ approximated (not quite so closely as in Schistostege), connected by a bar near end of 
cell, 2nd subcostal long-stalked, 2nd radial about central (from the sharp outward angle of the discocellulars), 
1st median connate or shortly stalked, 2nd submedian developed, close to abdominal margin, no appreciable 
pocket at base. Genotype: hippocastanarioides Eothsch. (as Chesias). A somewhat isolated genus, differing from 
Schistostege in shape, maculation, short palpus, long cells, very different origin of the medians, presence of 
submedian in the C hindwing and anastomosis of the costal thereof in the $. I do not know why it was 
considered a Chesias, although it may probably have a similar resting posture; the foretibia lacks the claws 
and there are many other differences. 
G. hippocastanarioides Eothsch. (8 e). Sufficiently characterized by the shape and structure. The longi- hippoca- 
tudinal dark dashes on the folds are more conspicuous than the ill-defined, curved transverse bands. Algeria, stanarioides. 
very local in March and April, described from Guelt-et-Stel, but reaching northward to Berrouaghia. — rotroui rotroui. 
subsp. nov. (8 d) is a noteworthy form, or representative species, somewhat less narrow-winged, median veins 
longer-stalked, forewing less brownish, the bands strengthened, the longitudinal marks much reduced. Oran: 
Sidi-bel-Abbes, 7 April 1918 (M. Rotrou); unfortunately I know only the type, a $ in the Tring Museum. 
18. Genus: Utliostege Hbn. 
(See Vol. 4, p. 171.) 
It is more than doubtful whether this genus can be separated by any significant structural characters 
from Chesias, which bears the older generic name. But inasmuch as that is, in the main, a rather compact 
group, while the so-called Lithostege are much more heterogeneous, it might cause some inconvenience to 
sink the large and widely distributed group to the small and almost exclusively European one. I therefore 
retain the division which has for so long served the needs of our “Palaearctic” lepidopterists. To the given 
range should be added Angora, Kenya and the United States of America. 
L. farinata Hufn. (Vol. 4, pi. 6 cl). It was recently questioned by Auerbach whether griseata might farinata. 
not be merely a form of farinata. This suggestion brought forth, amongst others, a valuable account of the 
two by B. Alberti of Merseburg, based on wide personal experience of both in his own district, vhere, fari¬ 
nata has a wide distribution while griseata is very localised, always where there is Sisymbrium sophia — he 
suspects, with Stange (1869) that farinata is less particular in its choice, probably accepting also Sinapis 
