Cv) 
Though he had published a revision of this genus in the 
Transactions of the Society in 1889, yet, as a great deal of 
new material had come to hand, he thought it was time for a 
fresh revision, especially with regard to the genitalia, which 
had been very carefully examined and figured by Dr. Chapman, 
and threw great light on the affinities of some of the more 
obscure species in the genus. His attention had first been 
called to this by Herr Calberla of Dresden, who had shown 
that the supposed melas from the Tyrol, which M. Oberthur 
had named melas-nicholli, was really a variety of ZL. glacialis 
which appeared to be fairly constant in the Dolomite moun- 
tains of the Tyrol, occasionally appearing as an aberration in 
the Western and Central Alps. He had been much assisted 
in his investigations by a fine series of specimens from 
Siberia lent to him by M. Alphéraky from the collection of 
the Grand Duke Nicholas Michailovich. Tracing the geo- 
graphical distribution, he stated that the principal European 
centres of the genus were the Alps and Pyrenees, only a few 
forms occurring in Scandinavia, while the Ural Mountains 
and Caucasus were comparatively very poor in species; the 
genus became abundant in E. Siberia. Though it was im- 
possible as yet to pronounce a positive opinion as to the 
distinctness of some of the forms, it seemed clear that there 
was a distinct connexion between the Erebias of Eastern 
Siberia and those hitherto known from North America, of 
which only one from Boothia Felix seemed to be really 
peculiar to the New Continent, the other seven being identical 
with, or very nearly allied to, Siberian and European species. 
He had been invited by the Director of the British Museum 
to re-arrange their series of Hrebia, which would now, he 
thought, owing to the large accessions of the Frey, and 
Godman and Salvin collections, be a very fine one. He 
appealed to the Fellows of the Society to complete as far as 
possible the blanks remaining in the National collection, and 
pointed out that there was still very much to be learned even 
about the species of the European Alps, where two apparently 
quite distinct new Erebias had been discovered in very 
accessible localities since he wrote his last paper. The life- 
history of most of the species still remained to be worked out. 
