Full. 30. VIII. 1911. 
ZEUXIDIA. By H. Fruhstorfer. 
433 
(102 a) inhabits northern Borneo; Waterstradt found it in the woods of the coast in the Sultanate of 
Brunei in North Borneo, whence the figured specimens were received. In South-east Borneo a distinct 
local race has already been developed; octacilia subsp. nov. smaller than the northern ottomana from which it odacilia. 
is distinguished by a very narrow ochre-yellow scarf in the $$, and an also reduced, posteriorly abbreviated 
dark violet-blue band on the SS- •— philippina Fruhst. stands very close to pylaon Fldr. from Java; only philippina. 
one $ is known, from Panaon, Central Philippines, figured by Semper. The pale yellow band on the forewings 
is only 7 mm broad and only extends beyond the lower median as a spot not larger than a pea. Flies in May 
(Semper). — perinthas subsp. nov. among the types in Statjdinger’s collection, comes from Mindanao, where perintJms. 
it was taken by Dr. Platen. A approaches the javanese branch, but the band on the forewing still broader, 
lighter blue and anteriorly whitish. $ scarcely to be distinguished from pylaon $, but the yellow-brown 
zone is rather narrower, more regular, and the apical area of the hindwings still paler. The underside is more 
like that of A. plateni Stgr. from Celebes. 
Specific group Zeuxamathusia Stgr. A with hair tufts in the cell of the hindwings. 
A. plateni is separated in the celebean subregion into two described, strongly differentiated insular plateni. 
forms, plateni Stgr. reaches Europe almost entirely from the northern part of Celebes, where Dr. Platen found 
a few specimens at Minahassa. Later I had the good fortune to lure and capture about 50 pairs by the use 
of baits (in the coastal woods at Toli-Toli); a proceeding which was put an end to by the monkeys and birds 
which stole the fruit I exposed, plateni is one of those denizens of the woods which are a broad even in the 
heaviest rains. On sunny days the butterflies appear for a few minutes about midday, emerging suddenly 
like ghosts from the depths of the woods, flaunt the blue glories of their forewings for a moment, and then 
settle on a branch with folded wings. If disturbed, they only fly a few yards and usually creep through the 
bushes down to the ground, where the monotone colouring of their under surface harmonizes with their sur¬ 
roundings so as to make discovery extremely difficult. If one follows them into the thicket, one only captures 
badly torn specimens, plateni A approaches pylaon in the cut of the wings, but falls behind it in size; the blue 
zone does not penetrate so far into the cell of the forewing as in the Java form, and comes to an end in 
the middle of the wing before the lower median. In the $ the deep ochre-yellow band commences breaking up 
into isolated spots, of which two are placed beyond the cell, two near the distal margin. On the under¬ 
side the $ has a richer violet suffusion than pylaon from Java, and the red-brown longitudinal bands are 
more prominent. The pubescent swelling on the AS has a black colour, and the cell in the hindwing is 
also clothed with a dense covering of scales and setae, herein differing from pylaon and ottomana. Doherty 
found a race allied to plateni in southern Celebes, near the celebrated waterfall of Maros, and on the Sula 
Islands he discovered a highly specialized insular form suprema Fruhst. (102 b), of which there are two $$ suprema. 
in coll. Frithstorfer and one A in the Staudinger collection. The wings of suprema are rounder than 
those of plateni, the blue spots on the forewing are scarcely half as broad and also shorter. The underside is 
considerably darker, the ocelli more distinctly white centred, the whole surface with a deeper and richer 
violet suffusion than in plateni $. The yellow oblique bar on the forewings much broader, more sharply defined. 
Between the median veins are two much larger, external yellowish spots, but the proximal brown-yellow spots 
below the cell, always present in plateni, are entirely wanting. Costal and terminal margins of the hindwings in 
suprema much broader light yelloAV bordered, and the two ocelli on the under surface of the hindwings larger, 
more distinctly white centred and with a blackish external streak, which is absent in plateni. Flies in October 
and November. Sula-Mangoli. 
11. Genus: Zeuxitlisa Flbn. 
The;5Zeuxidiae belong to most splendid sights of the indian tropics and are structurally closely allied 
to the genus Amathusia, but possess a conspicuous differential character in the peculiar spur on the anterior 
median nervule of both wings; in the foreAving it is someAvhat removed from the apex of the cell, but in the 
hindAvings might easily be mistaken for a nervure closing the cell. Zeuxidia differs further from Amathusia 
in having the first and second subcostal nervures anastomosed with the costal, in the more extended sexual 
dimorphism, and in the highly developed secondary, or more correctly tertiary, sexual characters of the AS- 
Tavo groups of species can be erected, based upon the presence or absence of hairtufts in the cell of the hindwings. 
All AS have in addition an extensive smooth speculum on the underside of the foreAvings, an androconia- 
cavity between the costal and subcostal, and a deep pouch-like fold on the submedian of the hindwings, in 
which rests a pencil of yelloAV or black hairs, which is capable of being erected. One species ( aurelia ) has a 
second hairtuft between the submedian and the cell of the hindwings and a fur-like bordering to the latter 
consisting of mouse-grey modified scales. Nothing is known of the early life history of Zeuxidia*)', but the 
imagos, in contrast to Amathusia and Thauria, are, like Taenaris true day fliers. It is true they never leave 
the shade of the forest, but they only fly on sunny days, and according to my observations in Java only in the 
*) Compare Appendix p. 449. 
IX 
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