THE WEEKLY ENTOMOLOGIST. 
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OBSE KVATIONS . 
Emigration of insects, (continued) 
Formerly the genus Polyommatus had 
a good sprinkling of now-discarded 
species in it : — Alcon, Eros, Dorylas 
Chryseis, Virgaurece etc, — have they 
settled down ? or rather, were they 
not imported to satisfy the wonderful 
craving for “ another butterfly,” 
which sprang into existence with the 
old Aurelian Society, and has never 
died out.? That some species are 
imported with foreign produce is ad- 
mitted by those who have paid most 
attention to this matter, but that 
Lepidoptera migrate is not yet an 
established fact. If they did, they 
must travel in great numbers together, 
and all that seems to be claimed for 
them is that one specimen is sometimes 
taken by somebody, whom nobody 
knows, in some queer, out-of-the-way 
place, and it always gets into the 
right hands to be appreciated, the 
next day or so. Uet us not, then, 
place implicit confidence in such ( to 
say the least ) unlikely cases. 
That our Northern bred Vannessidi 
have taken a trip South for change o f 
air, won’t do. That they have not 
been abundant here, on the wing is 
true, yet the larvae of V. Urticce, Io 
and Atalanta were not rare this sum- 
mer. I saw them in Lancashire, 
Cheshire, Flint, Denbigh, Westmore- 
land and in Cumberland, within a 
mile or so of Scotland ; — but it does 
not follow that, because butterflies 
are not seen on the wing, they are 
absent. One fine hour at any part of 
a day will bring them out freely, 
where none were to be found or seen 
for a month. 
I went twice to Grange this year. 
There were no butterflies to be seen 
on either day, except for about half 
an hour on the second journey, when 
the Pieridce and Blandina were out 
freely, — the latter much worn, yet, 
two days before, Mr. Mason had taken 
a long series of it, in splendid condi- 
tion. This brings me to the question, 
— has anyone seen Northern species 
in the South ? Let us first define what 
Northern species are (or Southern 
ones. ) Formerly we had no end of 
so-called Northern and Southern spe- 
cies in our lists. Now we have very 
few. Some years ago S. Conspicua- 
ria was exclusively Northern, — now, 
it is not so. E. Versicolor used to 
be exclusively Southern, — now, it is 
not so. The same remarks apply to 
P. Corydon and T. Betul a, and I 
took C. Curtula, this year, on the 
borders of Scotland. Once Oelerio 
and Lineata were called Northern. 
Now they have both been taken in 
