emale may be like, owing to the extreme isolation
of the species, and its want of close affinity to any other known
insect.

One of the most curious and interesting reptiles which I met with in
Borneo was a large tree-frog, which was brought me by one of the Chinese
workmen. He assured me that he had seen it come down in a slanting
direction from a high tree, as if it flew. On examining it, I found the
toes very long and fully webbed to their very extremity, so that when
expanded they offered a surface much larger than the body. The
forelegs were also bordered by a membrane, and the body was capable of
considerable inflation. The back and limbs were of a very deep shining
green colour, the undersurface and the inner toes yellow, while the
webs were black, rayed with yellow. The body was about four inches long,
while the webs of each hind foot, when fully expanded, covered a surface
of four square inches, and the webs of all the feet together about
twelve square inches. As the extremities of the toes have dilated
discs for adhesion, showing the creature to be a true tree frog, it is
difficult to imagine that this immense membrane of the toes can be for
the purpose of swimming only, and the account of the Chinaman, that it
flew down from the tree, becomes more credible. This is, I believe, the
first instance known of a "flying frog," and it is very interesting to
Darwinians as showing that the variability of the toes which have been
already modified for purposes of swimming and adhesive climbing, have
been taken advantage of to enable an allied species to pass through the
air like the flying lizard. It would appear to be a new species of the
genus Rhacophorus, which consists of several frogs of a much smaller
size than this, and having the webs of the toes less developed.

During my stay in Borneo I had no hunter to shoot for me regularly, and,
being myself fully occupied with insects, I did not succeed in obtaining
a very good collection of the birds or Mammalia, many of which, however,
are well known, being identical with species found in Malacca. Among the
Mammalia were five squirrels,and two tigercats--the Gymnurus Rafesii,
which looks like a cross between a pig and a polecat, and the Cynogale
Bennetti--a rare, otter-like animal, with very broad muzzle clothed with
long bristles.

One of my chief objects in coming to stay at Simunjon was to see the
Orangutan (or great man-like ape of Borneo) in his native haunts, to