462 L. de Nic^ville & Dr. L. Martin— Butterflies of Sumatra. [No. 3, 
376. Castalius roxus, Godart. 
Hagen as roxus , Godardt [sic]. Standinger. 
377. Castalius elna, Hewitson. 
Widely distributed, found in North-Eastern and Southern India, 
Burma, the Andaman Isles, the Malay Peninsula, and Java. C. rosimon , 
Pabricius, G. ethion , Doubleday and Hewitson, G. roxus , Godart, and 
G. elna occur in the plains and outer hills south of Bekantschan and 
Bohorok. G. rosimon , G. roxus , and G. elna are found on roads and grassy 
places such as forest tracts overgrown with high grass, and settle with 
folded wings on the ground if moist, or on the tops of flowering 
Graminese. C. ethion keeps more to low shrubs, and is found inside the 
forest. C. ananda , de Niceville, is only found in the forest on certain 
bushes in February and March. Dr. Martin took it, also in March and 
April, at Singla below Darjiling in the Western Himalayas only on 
certain trees, but I have caught the male in the same place on the wet 
sand in the beds of streams. The female of 0. ethion , which has no 
blue coloration on the upperside of both wings, is so far quite similar 
to the male of G. roxus , our most common species, but the markings of 
the underside will instantly distinguish them. G. elna , the largest of our 
Castalius , is decidedly rarer than G. rosimon , G. ethion , and G. roxus ; 
C. ananda is the rarest of all, and found only at the higher elevations. 
378. Polyommatus B(ETicus, Linnaeus. 
Snellen. Hagen. Distant as hseticus [sic]. This widely-spread 
butterfly occurs in Sumatra near the sea, as Dr. Martin has taken it at 
the Saentis Estate and at Loboe Dal am on the flowers of the common 
kidney bean ( Bliaseolus vulgaris , Linnaeus), and also very high in the 
mountains at Soengei Batoe and on the Central Plateau, but it is never 
found in the intermediate area. Dr. Martin is quite unable to account 
for this fact, which has also been observed by Dr. Hagen, who has 
taken P. boeticus near Laboean on abandoned Indigo plants, and 
believes that the butterfly was imported to this very low elevation 
from Singapore when the Malays first introduced the Indigo plant from 
thence. 
379. *Cupido jetherialis, var. 
Hagen. I am unable to trace this species. 
380. *LyCJ]NA AUGUSTA. 
Grose Smith. I have failed to discover this species also. 
