1895.] L. de Niceville & Dr. L. Martin —Butterflies of Sumatra. 481 
the foregoing species, but is much rarer than the two other Biduandas. 
Found in the Battak mountains in January, April, July and December. 
The male has a very conspicuous sexual mark on the upperside of the 
forewing. 
487. Marmessus moorei, Distant. 
Hagen. Staudinger. Distant. Snellen. One of the commonest 
lycaenids of the forest of the plains and outer hills, and flies throughout 
the year. Superficially very similar to Biduanda thesmia, Hewitson, 
not only in coloration and form, but also in habits. Mr. Distant has 
figured on pi. xliv, fig. 11 of Rliop. Malay, a very small female of this 
species as a variety. Such dwarf forms in both sexes are not at all 
rare in Sumatra. 
488. Marmessus boisduvalti, Moore. 
Dr. Martin possesses a single pair which appertains to this species, 
as they have a large discal orange patch on the upperside of the fore¬ 
wing. They were taken in the Battak mountains in February. 
489. ^Marmessus ravindra, Horsfield. 
Hagen. Grose Smith, As this butterfly is found in Nias and 
Java, it not improbably occurs in south-eastern Sumatra also. 
490. Eooxylides tharis, Hiibner. 
Grose Smith. Moderately common in the low forests at Selesseh 
and Namoe Oekor, and occurs throughout the year. It is rarer than 
B. thesmia , Hewitson, and If. moorei , Distant. 
491. Loxura atymnus, Cramer. 
Hagen. 
492. Loxura Cassiopeia, Distant. 
Hagen. Originally described from Perak in the Malay Peninsula. 
Both the species of Loxura occur throughout the year at low elevations 
not much higher than Namoe Oekor in forest or its margins. They 
have a short and jerky flight, and are weak on the wing, never flying 
for long distances. 
493. Yasoda pita, Horsfield. 
Grose Smith. Hagen. Originally described from Java. 
