520 L. de Niceville & Dr. L. Martin — Butterflies of Sumatra. [No. 3, 
Wellesley and Kwala Lumpor in Selangor also in the Malay Peninsula. 
I possess two specimens from Quang and Kwala Lumpor. Sumatran 
specimens agree fairly well with Malay Peninsula ones, and with 
Distant’s figure of the species, pi. xxviia, fig. 6 , male. Both sexes 
mimic the corresponding sexes of Euplcea linnsei , Moore. Dr. Martin 
has obtained two females only of P. butleri , which mimic the female 
of E. linnsei. It is rare in the plains and outer hills, near Selesseh, in 
Padang Bedagei and Asahan, also in the Gayoe territory, but certainly 
not much higher than Bekantsclian, and flies from January to June and 
again in September, but in no other months. The males if undisturbed 
are on the wing exactly like E. linnsei , but as soon as they scent danger 
they assume the typical rapid flight of a Papilio. They are very fond 
of wet swampy spots on roads in the forest. The females are very 
scarce. Dr. Martin’s brother bred it in Asahan in 1891 from larvae found 
on a low shrub (not a creeper) in the forest; they were velvety black 
with fleshy red tubercles. The pupa, suspended by a black median 
girth, adheres by the three posterior abdominal segments to a branch 
of the food-plant, and looks like an obliquely cut off bit of stick as 
do the pupae of all this group. The pupa is quite rigid, and has no 
motion in the abdominal segments whatever. 
591. Papilio ( Euplceopsis ) .enigma, Wallace. 
P. anigma , Wallace, Trans. Linn. Soc. Lond., Zoology, first series, vol. xxv, 
p. 60, n. 83, pi. vii. fig. 3, male (1865). 
Described by Wallace from Malacca, Sumatra, and Borneo. The 
specimen figured is from Sumatra. It is possible that the butterfly 
figured by Distant in Bhop. Malay., pi. xxvii, fig. 6 , as the female of 
P. butleri, Janson, is the true female of P. senigma. (Wallace records 
that species from Malacca as noted above, but Distant concludes that 
the Malaccan specimen so identified is the P. butleri described subse¬ 
quently as a distinct species.) It is extremely difficult to say who 
is right, Wallace or Distant; the butterflies of this group are excessively 
rare, so that it is almost impossible to get together sufficient material to 
decide the point. Dr. Martin has two females only, one taken on the 
outer hills south of Namoe Oekor, in December, the other in Indragiri 
in the middle of Sumatra, in February. These specimens agree with 
Distant’s figure above quoted, and I prefer to consider them to represent 
P. senigma rather than to be a dimorphic form in the female of P. but¬ 
leri. Dr. Martin, as noted above, possesses the ordinary form of the 
female of P. butleri which mimics the female of Euplcea linnsei , Moore, 
and was uuknown to Distant. 
