1895.] L. de Niceville & Dr. L. Martin — Butterflies of Sumatra. 393 
on his authority I maintain the species as distinct. In Sumatra Z. nice- 
mllei is rather more common than Z. amethystus , Butler, and it occurs at 
Bekantschan and Selesseh in June and August, and even at Batang 
Serangan, still nearer the sea; also in Asalian. The female has the 
macular band on the upperside of the forewing violet-white. 
105. * Zeuxidia luxerii, Hiibner. 
Grose Smith as Amathusia [sic] luxerii. Only known to us from 
Java, where it is the commonest species in the genus. 
106. Zeuxidia ( Amaxidia ) Aurelius, Cramer. 
Grose Smith as Amathusia [sic] aurelius. Staudinger. Kirby. Dis¬ 
tant. This species was originally figured and described by Cramer from 
a female obtained on the west coast of Sumatra. Occurs from Selesseh 
to Bekantschan and even higher in May and September; is rarer than 
the other species of the genus. The female often measures six and a 
half inches across the wings, and is one of the largest-known Rhopalocera 
in total wing area. The female has the band on the upperside of the 
forewing white. All Zeuxidias are only met with in large high forest 
near small streams, on whose borders there are usually some bamboos, 
on the leaves of which most probably the larva feeds. They fly rapidly 
but settle often, but always in a dense mass of branches and stems of 
bushes, so that they are very difficult to secure. The best way to 
collect them is to place rotten plantain fruit (pisangs or bananas) along 
the streams they haunt, to which they will come. The males of all 
our Zeuxidias are true inhabitants of the forest, and exhibit rich blue 
colours on the upperside. When settled with closed wings their very 
great resemblance to dead leaves on the underside makes them very 
difficult to distinguish amongst the true dead leaves which always and 
at all seasons strew the forests in the tropics. In South-East Borneo 
(Bandjermassin) all species of Zeuxidia appear to be far commoner than 
they are in Sumatra, the Malay Peninsula and Burma. Out of 1,000 
specimens of butterflies Dr. Martin received from thence, 200 were 
three species of Zeuxidia. 
107. Amathuxidia dilucida, Honrath. 
Occurs only in high forest in July, and is found up to the elevation 
of Bekantschan. Very rare, Dr. Martin obtained five specimens only 
in thirteen years ; one pair from Aer Kesoengei in Asahan. It has the 
same habits as Zeuxidia , and is difficult to secure. 
108. Amathusia phidippus, Johanssen. 
Grose Smith. Snellen. Semper. Distant. Hagen. It sometimes 
