good series of the new butterfly, which I have since named
Ornithoptera croesus. The Mussaenda bush was an admirable place,
which I could visit every day on my way to the forest; and as it
was situated in a dense thicket of shrubs and creepers, I set my
man Lahi to clear a space all round it, so that I could easily
get at any insect that might visit it. Afterwards, finding that
it was often necessary to wait some time there, I had a little
seat put up under a tree by the side of it, where I came every
day to eat my lunch, and thus had half an hour's watching about
noon, besides a chance as I passed it in the morning. In this way
I obtained on an average one specimen a day for a long time, but
more than half of these were females, and more than half the
remainder worn or broken specimens, so that I should not have
obtained many perfect males had I not found another station for
them.

As soon as I had seen them come to flowers, I sent my man Lahi
with a net on purpose to search for them, as they had also been
seen at some flowering trees on the beach, and I promised him
half a day's wages extra for every good specimen he could catch.
After a day or two he brought me two very fair specimens, and
told me he had caught them in the bed of a large rocky stream
that descends from the mountains to the sea abort a mile below
the village. They flew down this river, settling occasionally on
stones and rocks in the water, and he was obliged to wade up it
or jump from rock to rock to get at them. I went with him one
day, but found that the stream was far too rapid and the stones
too slippery for me to do anything, so I left it entirely to him,
and all the rest of the time we stayed in Batchian he used to be
out all day, generally bringing me one, and on good days two or