702 
EULACEURA; SASAKI A. By H. Fruhstorfer. 
osteria. 
nicomedeia. 
bipupillata. 
kumana. 
jembala. 
siiarama. 
eliaronda. 
coreana. 
yunnanen- 
sis. 
junebris. 
fulguralis. 
50. Genus: Eiilaceura Moore. 
This monotypic genus is closely allied to Apatura, from which it may structurally be separated only 
by the shorter anterior median nervure. The chief characteristic are the clasping-organs. Uncus small, sharply 
bent downwards at the end. Valve with a very peculiar, spatula-shaped projection, raised vertically and ex¬ 
tending beyond the terminal point of the uncus, its base deeply indented and its distal portion externally 
visible, on which peculiarity Butler founded the genus. 
A. osteria ranges over the Macromalayan islands in a number of pretty sharply separated forms; 
the sexes are heteromorphic, with the white bands varying according to the locality, osteria Westw. (116 c) 
($ = panchaea Fldr.) was discovered in Java, where it is extremely scarce, only 3 $$ and 1 J coming into 
my possession within three years, being taken an elevation of about 2000 ft. in the western part of the island. 
Of the $ which is somewhat variable, I possess beside the figured form also a darker one with more sharply 
defined bands of the hindwings, which are much narrower and more richly suffused with purple ; also on the fore¬ 
wing the median band is reduced. —• Of nicomedeia subsp. nov. I have a series of from north-eastern 
Sumatra and from the Padang-Bovenlanden in the western part of the island; from the latter locality (near 
Padang-Pandjang) I have also a §. The latter has the wings more pointed than the $ of osteria, with the 
transcellular portion of the forewing more faded, and in one specimen of the Tring Museum dusted with grey. 
On the forewings the median spots are more blue-white, on the hindwings the pale median area is reduced. 
— bipupillata Lathy I can judge only from a $ in the Adams Collection of the British Museum and another 
in the Tring Museum. It is characterised by a band-shaped milky-white patch traversing the entire submar¬ 
ginal area of both wings, enclosing 2 intramedian ocelli; this band is in the other island-forms only slightly 
developed. Island of Nias. -—- kumana subsp. nov., described from a $ in the Tring Museum, from Perak and 
Penang, which deviates from Borneo-^9 in the clearer white and broader discal area of both wings. Presumably 
we may refer to kumana also the specimens reported by Niceville from Southern Tenasserim. -—- jembala 
subsp. nov. (type from Mount Marapok in Borneo), one specimen, collected by Waterstradt, in the Staudinger 
Collection at Berlin, is the darkest form; on the fore wing the white spots completely isolated and greatly 
reduced, and the white bands of the hindwing replaced by grey ones, with the leaf-shaped markings sharper 
than in Sumatra specimens, although suffused with purple. The $<$ of my collection are at once separated 
from those from Sumatra and Singapore by the barely half as wide median band of the forewings. — sita- 
rama subsp. nov., an astonishing discovery of recent times, has also in the <$ forewing some white transcellu¬ 
lar spots; in size it exceeds Perak $<$. Type in the Tring Museum, from the island of Hainan. According to 
Dr. B. Hagen the flight of E. osteria is very rapid, but only of short duration, it alights with wide-spread 
wings invariably on the under surface of the leaves, becoming thereby completely hidden to view. The 
collector must be extremely careful since the butterfly suddenly stops in its most rapid flight, turning 
in the. most unexpected manner, and disappearing under some leaf. 
51. Genus: Sasakia Moore. 
Sexual organs with extraordinarily minute, short and slender uncus and very broad valve, drawn 
out, as in Apatura, to a long point, greatly projecting beyond the uncus. Only two species known, which 
have been lately discovered also in Formosa and the Province of Yunnan. Cf. Vol. I, p. 166. 
Of S. charonda the northern insular form charonda Hew. has been treated already in Vol. I, p. 166, 
pi. 51 d), occurring in Japan from the North-island to Kiusliiu, according to Matsumara also in Formosa, al¬ 
though I have not seen specimens from there. — coreana Leech (Vol. I, p. 196, pi. 52 a) extends southwards 
as far as Szetchuan. — yunnanensis subsp. nov. differs from Japanese specimens in the more intense and paler 
blue of the upper surface. Forewings with pale yellow spots, likewise the hindwings on which the pale yellow 
spots clearly stand forth from the pale green ground underneath. Yunnan, the locality unknown. Type in the 
Tring Museum. 
S. funebris, hitherto only known from China, was recently discovered also in Formosa. — funebris 
Leech (Vol. I, p. 166, pi. 52 a). A very rare form from West-China; another mainland-form is genestieri Oberth. 
(Vol. I, p. 166), taken an altitude of about 6000 ft. at Lutsekiang in the Province of Yunnan. — As fulguralis 
Mats, a very rare insular form was described, the original description of which we copy for the want of authen- 
tical material. In colouring and shape resembling the Chinese S. funebris, from which it differs as follows: 
Forewings above with two crimson spots traversing the cell, the inner of which somewhat L-shaped. Beneath 
