NEW NORTH-EASTERN SUMATRA BUTTERFLIES. 47 
band, outwardly defined with the Iunulated blackish line of the wpperside ; 
the abdominal margin tinted with bronzy-greenish, FEMALE, UPPERSIDE, 
both wings much paler than in the male, dull ochreous-brown ; with the discal 
whitish band much as in the male, but with no outer blue band on the hind- 
wing, UNDERSIDE, both wings almost precisely like the male, except that the 
outer margins are tinted with opalescent-whitish, 
Nearest to &. salia, Moore, from Java,* from which £. erana differs in the 
male on the upperside of the forewing in the discal band not being “ margined, 
outwardly with dull blue,” and on the hindwing in having the lanceolate black 
line much more deeply zigzagged, the discal white band twice as broad. The 
female differs on the upperside of the hindwing in having the discal white band 
much less prominent, sullied with brownish instead of pure white, and con- 
siderably narrower. 
The species figured as H. laverna by Butler in his ‘“ Lepidoptera Exotica,” 
p. 174, pl. lx, fig. 5, male (1874), from Borneo, appears to be another closely 
allied species, differing at a glance from Z. erana, however, in the discal band. of 
the hindwing on the upperside in the male being blue instead of white, and with 
no blue region beyond. It is very close to &. decorata, Butler, but, as figured> 
has the discal band of the forewing on the upperside anteriorly composed of a 
double series of pure white highly angled lunales, while in Z. decorata the band 
throughout is sullied with fuscous. As Mr. Butler has elected to consider the 
female of his &., laverna from Penang and Malacca as the type of his species 
(both sexes of which are described and figured by Mr. Distant in his 
“ Rhopalocera Malayana’’), I propose to name the male figured by Mr. Butler, 
Euthalia lavernalis, as it is at present unnamed. 
E. erana is described from a single pair of specimens in my collection, 
7. EUTHALIA (Tanaécia ?) ELONH, n. sp., Pl. L, Fig. 3, ¢. 
Hasirat: Battak Mountains, Sumatra, 
Expanse: ¢, 2°7 inches, 
DESCRIPTION: MaLe, Upprrstps, both wings dark hair-brown or fuscous, 
Forewing with the usual linear black markings in and beneath the discoidal 
cell ; a discal very obscure pale band, to be seen only in some lights, broad on 
the costa, rapidly diminishing in width to the third median nervule; the 
anal angle bearmg three increasing metallic green spots divided from the 
margin by a fine line of the ground-colour and from each other by the veins, 
* Heer P. C. T. Snellen in Tijd. voor Ent., vol. xxxiii, p. 217 (1890), records 
“ Adolias”’ salia from Sumatra, but the species here described was apparently not 
recognized by him as a species distinct from JZ. salia. 
