The Seamen Cried Out "It Was
Snowing Butterflies," And Such In Fact Was The Appearance.
More Species Than One Were Present, But The Main Part Belonged
To A Kind Very Similar To, But Not Identical With, The
Common English Colias Edusa.
Some moths and hymenoptera
accompanied the butterflies; and a fine beetle (Calosoma)
flew on board.
Other instances are known of this
beetle having been caught far out at sea; and this is the
more remarkable, as the greater number of the Carabidae
seldom or never take wing. The day had been fine and calm,
and the one previous to it equally so, with light and variable
airs. Hence we cannot suppose that the insects were blown
off the land, but we must conclude that they voluntarily took
flight. The great bands of the Colias seem at first to afford
an instance like those on record of the migrations of another
butterfly, Vanessa cardui; [5] but the presence of other insects
makes the case distinct, and even less intelligible. Before
sunset a strong breeze sprung up from the north, and this
must have caused tens of thousands of the butterflies and
other insects to have perished.
On another occasion, when seventeen miles off Cape Corrientes,
I had a net overboard to catch pelagic animals.
Upon drawing it up, to my surprise, I found a considerable
number of beetles in it, and although in the open sea, they
did not appear much injured by the salt water. I lost some
of the specimens, but those which I preserved belonged
to the genera Colymbetes, Hydroporus, Hydrobius (two species),
Notaphus, Cynucus, Adimonia, and Scarabaeus.
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