EXTRAORDINARY FLIGHT OF BUTTERFLIES: The swarm of butterflies which crossed the Channel, and appeared at Dover on the 5th ult., are said to have belonged to the “Pontia capae” (or rapae?).
A correspondent says he has made very minute enquiries into the subject on the spot, as he landed there from Ostend, on the Tuesday following the circumstance.
On the 13th he travelled by rail from Cologne to Ostend, the day was intensely hot, and he noticed in that district a prodigious number of these same butterflies through the whole district. The day on which the phenomenon occurred at Dover was exceedingly hot, with the wind at south. (Dover Telegraph 15 Aug 1846)