434 
ZEUXIDIA. By H. Ffuiistorfer. 
ddhrni. 
semperi. 
morning hours. Their flight is heavy, uncertain, ancl they never fly far at one time, as may be understood from 
the weak body, which can hardly bear the disproportionately large wings. Their appearance is restricted 
to the wet season; they avoid dry parts of the woods, and are found in moderate numbers only where the small 
watercourses increase the natural dampness of the tropical forest. The species are generally rare, in south¬ 
eastern Burma alone all the conditions necessary for greater increase appear to be present, since it is only 
fron thence that great numbers (of two species) have been sent to Europe. The dd emit a pleasing aromatic 
scent, which differs in all the species. I succeeded in decoying one species of Zeuxidia (luxeri) in Java, by han¬ 
ging up over-ripe bananas along the watercourses in the forest; the $2 came to them first, and were slowly follow¬ 
ed by the d'd'. Most of the Zeuxidiae inhabit the damp Lowlands, I know of only one species ( dohrni ) 
which goes up to 4000 feet. Macromalayana is their centre of distribution, from whence two species have 
advanced as far as Tenasserim, and two species have passed over to the Philippines. Only one species 
(luxeri) has gone from Java to Bali. The clasping organs of one species only ( amethystus ) are known to me, 
and, in contradistinction to Amathusia, they are highly developed. The valve is similar to that of Thau- 
mantis, strongly chitonized, more finely dentate on the inner side, and furnished with an apical spine. 
Uncus with a splendid cocks-comb-like, sharply dentate process, like that in some species of Argynnis. The 
uncus itself basally very broad and stout, only gradually attenuate outwardly. Penis long, pointed and narrow. 
Specific group Zeuxidia. 
d with uniform smooth speculum on underside of forewing and with hairtufts in the cell of hindwing 
which have no distal fur-like scaling. 
a) Only one hairtuft in the cell of hindwings. 
Z. dohrni Fruhst. (102 c $). d; Forewings above deep ultramarine blue with very broad, light blue, 
violet iridescent band. This band is strongly waved, begins on the costal nervure and ends, slightly narrowed, 
at the anal angle. Base of the wing tinged with brown, the apex light ultramarine blue with two indistinct violet 
spots before the apex. Hindwings dark brown, with a broad, curved, violet submarginal band, which extends 
from the costa onto the anal tail, where it is somewhat narrowed, leaving only the apex black. Prom this 
submarginal band to the submedian the wings are suffused with dark blue, the anal tails elongate. Wings 
brownish beneath, with a common, chestnut brown band, which covers the external angle of both cells, and 
a narrow, yellow-brown border on the terminal margin. The violet apical spots on the forewing show through, 
the cell is traversed by 4 unequal brown bands. Hindwing suffused with violet at the base and on the anal 
tails on both sides of the discoidal band. A large round eye-spot on the subcostal, another between the sub- 
median and the first median nervule. The cell crossed by 3 irregular brown bands, of which the middle is the 
darkest and most distinct. Head and thorax brown above, the pubescence wooly. Abdomen dark blue, short 
haired, palpi grey-brown, as is also the remainder of the body beneath. Antennae red-brown. larger size and 
paler in colour. Forewings basally light cacao-colour, with an irregular, whitish blue silky band, extending 
from the costa to the first median. Apex of wing blackish with two pale spots before the point; both sides of 
the band tinged with ultramarine blue, the anal angle ochre bordered. Hindwings lighter than the forewings, 
with long hairs at the base; the rather broad, ochraceous marginal band extends to the anal tail, before 
which it is slightly narrowed, and is broadly indented on the inner side by the almost parallel subapical black 
bar. Under surface of wings paler than in the U- Distal margin red-brown bordered. The blue scarf on the 
forewings and the black subapical band on the hindwings show through, the common discoidal band extremely 
sinuous. Anal tail black, with 2 marginal violet streaks. Body dark brown above with dark brown hair, palpi 
yellow-brown, thorax and abdomen white haired, antennae red-brown. Expanse of 77 mm, of $ 87 mm. —- 
dohrni is distinguished from all other Zeuxidiae which I have in natura ( luxeri , amethystus , horsfieldi, doub¬ 
ledayi) by an oval scent patch, which covers the middle of the submedian of the forewings, and is wanting 
in all the other species. On the other hand, the scent apparatus on the hindwings is far less conspicuous than, 
for instance, that of the most closely allied Zeuxidia horsfieldi. Between the costal and subcostal there is a round¬ 
ish, deeply impressed fovea, which appears on the underside as a swelling, it has shining margins and is filled 
with red-brown scales, which are covered by a tuft of blackish hairs. Below this scent pocket there is, in the 
cell, another dull shining elongate spot, furnished with rather longer, whitish yellow pointed black hairs. The 
second tuft of hair in the cell present in horsfieldi, amethystus, luxeri and doubledayi, is wanting, and the hair- 
pencil in a fold of the membrane between the 1st median nervule and the submedian, so distinct in horsfieldi 
and amethystus , appears in dohrni only like delicate down. Zeuxidia dohrni is thus characterized by a series of 
tertiary sexual differences. This fine species, which probably replaces doubledayi in Java, was first found by 
me on the Gede Volcano at a height of about 4000 feet. 
Z. semperi is still extremely rare in collections; two insular races are known; semperi Fldr., from the 
