EXE MAS 
It we turn now to the examination of the venation of the wings, 
we see also a considerable difference between the 5 species named, 
already pointed out by different authors. To enlighten us upon some 
points of the phylogeny of these species, we shall compare them with 
Arichanna melanaria L. 
Being very similar in its other systems, the venation of all our 
species shows some very important differenciating features in the radial 
system of the fore-wings. In melanaria vein К, anastomoses with Sc 
becoming free again and ending in the fore margin. In grossulariata, 
sylvata, pantaria and adustata R, coincidences with Sc on its whole 
length, excepted the short basal part between Sc and К., which Spuler 
erroneously calls a ,cross-vein“ between К, and Rs. In marginata this 
little cross-piece is atrophied, and thus we see that one, i. e. the first 
radial vein is missing. 
In this latter species we find another very curious symptom- 
that the subcosta does not touch the base of the wing, but terminates 
at about a quarter of the length of the cell before the base. In 
adustata R, anastomoses, or rather touches the common stem oi К. 
and К, forming thus another separate group of venation. Finally 
grossulariata can be separated irom sy/vafa and pantaria by the posi- 
tion of the starting points of К., which in the first species lies in the 
middle of vein К, (i. e. between the starting points of К. and the end 
of R,), whereas in the two latter species it has considerably advanced 
towards the apex of the wing. 
We have therefore arrived at the following grouping: 
1) melanaria, 
2) grossulariata, 
3) sylvata and pantaria, 
4) adustata and 
5) marginata. 
If we compare the structural differences of the male genital appa- 
ratus of the above species, we see the following : 
In melanaria there are no lateral processes, situated dorsally irom 
the valves and found in all other species. Sy/vata and pantaria dii- 
fer from the others by the lack of an uncus instead of which we see 
a rather strong scaphium. Grossulariata is marked by a short but 
stout uncus and broad plain valves and well developed harpes. Adu- 
stata bears a strong and rather long uncus, no harpes and a large 
sinus near the apex of the valves. Marginata has no harpes and nar- 
row, plain valves without any markings. Thus we have arrived at the 
same grouping oi the species as we have derived from the venation. 
Starting from the standing fact, that a simplification of the vena- 
tion proves a comparitively more recent origin in insects, we can deduce 
Revue Russe d'Entom. XI. 1911. № 3. 
