THE ENTOMOLOGISTS 
WEEKLY INTELLIGENCER. 
No. 159.] SATURDAY, OCTOBER 15, 1859 [Price Id. 
LOCALITIES OF SPECIES. 
We observed last week that our But- 
terflies nearly all occur in the South- 
Eastern corner of our Island — all but 
three. A hasty observer would lienee 
deduce that those three were Northern 
species, but it is not so ; they simply 
require certain localities which they do 
not find in the South-East of England. 
\ et they all occur in the South of 
Germany, and one of them in the 
South of Ireland; clearly then it is no 
especial partiality for a high parallel 
of latitude which prevents us catching 
Blandina, Cassiope and Davus in the 
South. Did we possess in Kent or 
Sussex a hill of sufficient elevation we 
might expect to find Cassiope, and a 
boggy moor on some portion of the 
hill would furnish us with Davus, 
whilst perchance some secluded valley 
or ravine would be enlivened by the 
gambols of Blandina. 
It must strike every one with sur- 
prise that none of these three species 
have been met with in the moun- 
tainous districts of Wales, and even in 
the region of Dartmoor we fancy some 
of the fraternity might be advan- 
tageously looked for. After we get to 
Manchester we find Davus northwards 
on all wet bogs and mosses, whether 
on low or high ground, and Blandina 
occurs freely at Wharfdale, in York- 
shire, and at Castle Eden Dene (hence- 
forth to be protected from the incur- 
sions of the Million), and in Scotland 
its habitats are numerous. Cassiope, 
the only Alpine Butterfly we possess, 
comes no further South than the Cum- 
berland mountains, though in Ireland 
it is found in Galway. 
Some of our Butterflies are so ex- 
cessively local that they do not in- 
habit regions or districts, but actual 
spots : thus Thecla Pruni seems con- 
fined to Monk’s Wood, Huuts; Pam- 
phila Aclceon to Lul worth, Dorset- 
shire ; Papilio Machaon is almost re- 
stricted to the Fens of Cambridge- 
shire and Norfolk ; and the localities 
in which Melitaa Cinxia, Polyommatus 
Avion and Acis, and Steropes Paniscus 
occur in this country are also limited 
in number. 
The circumstances which cause the 
restriction of a few species to such 
very confined localities are at present 
unknown to us. They are not so 
D 
