202 Mr. H. J. Elwes’s 
developed as compared with those in examples from Vitim 
and Vilinsk, though not more so than in some Norwegian 
specimens, I do not see anything in them to justify a 
varietal name. If they are separated, however, the name 
must include specimens from Nikolaivsk. 
Hrebia rossi, E. ero, and E. discoidalis. 
When I previously wrote on £#. vossz, which I then knew 
only from Curtis’s figure and description, I treated it as 
possibly a form of disa. Since then, through Prof. 
Aurivillius’s kindness, I have had the opportunity of 
examining the single very bad specimen which was taken 
at St. Lawrence Bay in North-East Asia by the ‘ Vega’ 
expedition. 
I find that the genitalia of this specimen agree precisely 
with those of what Strecker had sent me from Hudson 
Bay as fasciata, and of what M. Alphéraky sends me from 
Irkut in Siberia as evo of Bremer; and on referring to 
M. Oberthtr, whose collection contains three of the type 
specimens of 7ossi given by Curtis to Guenée, he admits 
that they are very near evo. If this be so, we find that 
the species is much more widely distributed in arctic 
America and Asia than was supposed. 
EL. ero of Bremer, which was taken by Radde in the 
Apfelgebirge, which seems to be a local name for a part of 
the mountains marked in maps as the Yablonnoi range, 
about five days’ journey east from Kiatcha, has never been 
refound in that locality by any recent collector, so far as I 
know. Staudinger speaks of it as “ Diese mir unbekannte 
Art.” I cannot be certain from the figure and description 
that it is the same as the form sent me from Irkut by 
Alphéraky as evo. If, as I think, this is probably the case, 
then the name of evo must give place to that of rossi, 
which has many years’ priority. 
The species may be distinguished from disa by the 
chocolate suffusion of the whole disk of the forewing 
below, by the range of small white spots on the margin of 
the hindwing below, and the absence of the dark lunules 
in the same place. 
From discoidalis it is easily distinguished by the presence 
of ocelli on the forewing, variable in number, and resemb- 
ling in size, colour and position those of #. dasa. 
