168 LYCANIDA. LAMPIDES. 
appendage, is ovate, bounded internally by a narrow orange crescent, and externally by a 
streak covered with greenish-silvery irrorations ; at its internal edge is a reniform spot, in- 
tensely black towards the anal angle, surmounted by a silvery lunule and a small orange 
crescent, and touching at the extreme anal angle a minute, dark-coloured, blind ocellus. Zaif 
lengthened, slender, brown above, and white underneath and at the extremity. Antenne 
black and regularly fasciated with white externally. Body pale blue above, white under- 
neath. FEMALE. UPpErsibg, doi wings milk-white, with a broad brown border, which in 
the forewing is simple and more extended near the tip, in the Aindwing waving internally 
and bearing a series of brown spots of a deeper tint towards the anal extremity ; these 
spots are enclosed individually by two white crescents applied to each other from the opposite 
sides and forming a white ring, exterior to which is adeep brown marginal streak, terminated 
by a grayish-brown cé/ia,” UNDERSIDE, doth wings as in the male. (Aorsjied, 1. c.) 
Wet-season form. 
DESCRIPTION: MALE and FEMALE. UNDERSIDE, both wings differ in the ground- 
colour being darker, more inclined to plumbeous, instead of being ‘‘ grayish-brown” as in the 
dry-season form ; all the white strigze prominent and well-defined, their edges never blurred ; 
the space between the strigze on the disc always concolorous with the rest of the wing, never 
forming distinct darker bands. fvrewing with the ground-colour always uniform, never 
becoming white on the disc towards the anal angle. Hindwing with the anal ocelli large, 
well-formed, and prominently inwardly crowned with orange. 
The arrangement of the four “characteristic” strie is clearly and minutely given by 
Horsfield, and it would appear that in all his Javan specimens strize nos. 1 and 3 (which alone 
completely traverse the disc ) were distinct ; and that ‘tin some cases”? their inferior portions 
appeared as the straight strokes of Ys, of which their upper portions formed the left arms. 
This arrangement of Ys is common also in Indian specimens ; but, as it is not universal, it 
may be well to state the arrangement of these strize in a form which will embrace all individuals 
that have come under my notice. 
All four strize start from the costa, or, more exactly, are only separated from the costa 
by small dots. Nos. 1 and 3 extend across the wing to the inner margin ; but nos, 2 and 
4 are short and reach only the third and second median nervules respectively. Some- 
times each of the striz nos, 1 and 3 is continued uninterruptedly across the disc, in which 
case the four strize are parallel and nowhere in contact. But often they are dislocated, 
no. I on the median nervure, no. 3 on its first branch: sometimes one only is dislocated, 
sometimes both; in the latter case the result is that two Ys are formed, as noted by Hors- 
field ; in the former case, while nos. 1 and 4 remain as two independent more or less uni- 
form and continuous striz, nos. 2 and 3 forma Y intermediate between them. This last 
is the usual arrangement in the dry-season forms, which present the dark bands between nos. 
I and 2 and nos. 3 and 4 as one very distinct and broad-stroked Y occupying the whole disc of 
the wing. All these modifications of the striae occur in the same broods, and in series of 
insects caught at the same place and at the sametime. But whatever be the dislocations, 
all four strize arise on the costa, nos. 1 and 3 are continued almost to the inner margin, no, 2 
extends only to the third, and no. 4 to the second median nervule. 
It will be observed that Horsfield in his ample and minute description includes in the 
one species @/ianus, insects with uniform tint of under surface crossed by distinct white 
striz, and also those with ground tint below variegated and clouded with white and traversed 
by broad dark bands (a/exis) ; but Messrs. Butler and Swinhoe consider tke latter form of Z. 
@lianus to represent a distinct species, and apply Stoll’s name a/exis to it. Messrs. Godart, 
Felder, Horsfield, Moore, and Distant agree with me in considering these two species synony- 
mous, and I have cleared up the matter a little by indicating that typical a@/exis represents the 
dry-season and typical e/ianus the wet-season form of one species. The dry-season form of Z. 
alianus is immensely variable; in the description of it given above I have indicated its main 
characteristics only. Mr. Butler has quite recently described one of the varieties of the 
