Cx) 
Dr. CHapman also read a paper ‘On the Species of the 
Genus Lvrebia, a Review based on the male appendages,” 
illustrated with drawings of these organs in about seventy-five 
reputed species. 
The appendages throughout the genus presented much uni- 
formity in the tegumen or sickle ; in the valvz or clasps which 
were marked by bold arrangement of spines in most species, 
there was much variety, but they might be arranged according 
to their general form into groups which were also natural 
groups in the genus, judging from other characters. 
Taking Z. manto or HL. euryale as a type, the “ grass Erebias ”’ 
(E. epiphron, EL. melampus, &c.) appeared to be direct deriva- 
tives therefrom and toform a group. Z. ceto with some eastern 
forms seemed nearest to this, and #. ethiops followed. <A 
group with Z. glacialis as type had a very bold clasp, whilst 
in the next group were placed £. neoridas, L. zapateri, EL. pronoe, 
EL. scipio, EH. lefebvreit, EH. nerine, E. goante, HL. lappona, &e. 
E. tyndarus seemed naturally to come here, and whilst £. 
epistygne resembled /. tyndarus, it seemed to require a group 
for itself. . disa, #. embla, and LH. ero formed another group. 
There was a large group of Asiatic-American species divi- 
sible into several subgroups and all characterised by a difference 
in neuration from the preceding groups of European type. £. 
medusa, both in neuration and clasp-form, seemed to be a 
transition form between these two large sections. 
E. evias, whose facies was that of the neoridas group had a 
clasp-form like nothing else in the genus and a neuration 
approaching that of the Asiatic group—its probable place was 
preceding L. disa. 
The chief items of revision as to specific rank were the 
placing of #. melas as a form of JL. nerine, the recognition of 
EL. magdalina and £. erinna as forms of FL. fasciata, of E. ero 
as identical with #. rossii, and of £. cecilia (Pyrenees nec 
Switzerland) and Z. gorgone as good species. 
A few species were regarded as not properly belonging to 
the genus. 
In connexion with the above papers Mr. Turr exhibited 
and made remarks on: 
1, A long series of Hrebia nerine from the Mendel Pass, the 
