( Mesxv: §) 
since the moth is very probably palatable and the Hesperid 
the reverse. 
“ Two other Hesperids, occurring in Sarawak, bear the same 
upperside pattern, viz. Kerana gemmifer, Butl., and the larger 
K. armata, Druce. Both are fairly common species, occurring 
in the same locality as Koruthaiolos xanites, and possibly 
present a case of synaposematic mimicry, but I do not know 
their flight, and so refrain from further comment. 
“2. Moth (Sub-fam. Chalcosiinae) mimicking a butterfly 
(Fam. Pieridae). I had for some time suspected the 9 of the 
Chalcosid moth Mimeuploea (Pidorus) inclusus, W1k., of being 
a mimic of the common Pierine, Zerias hecabe, L., but it was not 
till the capture of the ? of an interesting allied species Chalcosia 
(Cyclosia) hecabe, Jord., in May last, that I felt at all positive 
about it. The majority of Sarawak females of J/. (P.) inclusus, 
which is common enough, have a black hind-margin to the 
fore-wing, the inner edge of which is moderately even, and not 
indented in that marked manner characteristic of the Pierine, 
Terias hecabe. Now the ? of Chalcosia (Cyclosia) hecabe has 
this very indentation reproduced, and possessing also a 
pale yellowish ground-colour, is an excellent mimic of the 
Pierine.* MM. (P.) inclusus, on the other hand, exhibits only 
a very slight tendency towards this indentation in the black 
hind-marginal border. This common Chalcosid flies slowly and 
for short distances in open sunny places, and settles on the 
upperside of leaves; it is abundant, though, of course, not to 
be met with in anything like the numbers that may be seen of 
T. hecabe anywhere in Sarawak. It settles with fore-wings 
folded over the hind-wings, presenting a flat surface, so that 
the hecabe-pattern is conspicuous. For the theory of mimicry 
between these two species it is, of course, unfortunate that the 
Pierine invariably settles with wings closed and erect, nor does 
this Pierine, when settled, open and close its wings slowly, so 
that one can see the upperside pattern, as do some of the Papi- 
lios, e. g. P. agamemnon. But in flight there is no doubt that 
the moth is sufficiently like the Pierine to be mistaken for it. 
* Both these 9 ?, together with their ¢ ¢, which are entirely 
unlike Terias hecabe, are figured in Seitz, Gross-Schmett., x, pl. 3,4 
(1907).—E. B. P. 
