LYCHNID, - CHERITRELLA. 403 
Gonus 164.—-CHERITRELLA, de N. (PLATE XXVIII). 
Cheritrelia, de Nicéville, Proc. Zool. Soc. Lond., 1887, p. 456. 
“ FOREWING, with the costal margin slightly and regularly arched ; ower margin highly 
truncated from the apex tothe termination of the third median nervule, this truncated portion, 
moreover, being concave ; below the third median nervule to the inner angle the margin 
is nearly straight and oblique; zzer margin straight. Costal nervure very short, not nearly 
reaching to opposite the apex of the cell; first, second, and third subcostal nervules at 
regular distances apart before the origin of the wpper disco-cellular nervule, the fourth spring- 
ing from the third about the middle of its length ; upper adisco-cellular nervule directed 
outwards, eiddle and Jower upright and concave ; the bases of the second and third median 
nervules half the distance apart of the bases of the second and first ; submedian nervure straight. 
inwardly margined with bluish. Body above greyish-brown, beneath with Zegs more or less concolorous with 
the wings ; tarsi of legs with some blackish annulations.’’ 
‘© A female in the collection of Dr. Staudinger is my only knowledge of this species ; the male has still to be 
discovered.” (Distant, 1. c.) 
Genus Jacoona, Distant, Rhop. Malay., p. 241 (1884). ‘‘ FoREWwING, moderately long and subtriangular, 
costal margin strongly arched at base and then very slightly convex to a~ex, which is obtuse ; ozter 
margin convex, inner margin slightly sinuate; costal nervure short, terminating on the costa before the 
end of the discoidal cell ; first subcostal nervule emitted about the middle of the cell and anastomosed with 
the costal nervure, second subcostal nearer to the third than to the first, ¢izd subcostal arising from the end of the 
cell, third and fou tt bifurcating a little beyond the middle of the third ; lower disco-cellular nervule somewhat 
concavely oblique; ¢#ivd median nervule at the end of the cell, second median about half the distance from first 
as from third. Hinpwtnc, elongate, and irregularly subovate ; costal margin with its basal third convex and then 
deflected and oblique to the afex, which is rounded, fosterior margin oblique and rounded to the median nervules, 
where it is more or less waved and is provided with two ¢az/s, a short one at the apex of the first median nervule, 
and a very long one at the apex of the submedian nervure ; abdominal margin convex ; costal nervure reaching 
to about the apex of the wing ; subcostal mervudes bifurcating near the end of the cell; third and second median 
nervules emitted close together near the end of the cell, _#s¢ median at about two-thirds from the base of the cell, 
Body and degs moderately robust ; Aa/fi erect, second joint raised above the level of the eyes, third joint very 
small and slender.” 
“This is probably a somewhat restricted genus, and the following species is alone known to the writer as at 
present belonging to it. The anastomotic condition of the costal nervure and first subcostal nervule of the fore- 
wing at once separates it from the allied genera.” (Diéstant, 1. c.) 
The type species of the genus does not appear to possess secondary sexual characters in the male. 
Jacoona anasuja, Felder. Myrina anasuja, Felder, Reise Novara, Lep., vol. ii, p. 237, n. 266, pl. xxx, 
figs. 3, 4, #tale (1865); Jacoona anasuja, Distant, Rhop. Malay., p. 242, n.1, pl. xxi, fig. 15, merle (1884). 
HasiratT: Malacca interior ; Province Wellesley. ExpansE: Made, 1'7 inches. Description: ‘‘ MALE, fore- 
wing somewhat produced at the apex, the external margin most slightly concave, the internal margin straight, 
hindwing with the anal region somewhat produced, a long tail at the tip of the upper internal nervule, an acute 
tooth at the end of the first median nervule. UppersIDE, both wings blackish-fuscous. forewing with the inter- 
nal border covering the base, and an oblique fasciole beyond the cell pale cyaneous. AHindwing with the costal 
border more palely fuscous, a large internal area palely cyaneous, the internal groove and anal process whitish, 
with two subanaF spots, the line before the cilia and the tooth black, the tail whitish. UNDERSIDE, 60th wings 
ochraceous-hoary, about the outermost part rufescent-brownish. zadwing with the internal region, especially 
the anal, whitish, with eight anal black spots in a double series (the third spot of the inner sigma-shaped, the 
first of the outer dot-shaped, the second and fourth anal, outwardly marked with cyaneous blue somewhat 
larger).” 
** One of the most splendid insects of the genus, known to us only by one single male specimen. It differs 
much from 7, [= Neocheritra} amrita, Felder, both in the form, colour, and pattern of the wings, and also in the 
want of the fine mane-like hairs on the edge of the inner margin of the forewing, and of the scaleless spots on 
the underside, and in the stouter structure of the body, the longer abdomen, and in the neuration. The costal and 
subcostal nervures run close together, the latter is three-branched, the first branch anastomosing for some distance 
with the costal nervure, the transverse vein of the forewing obliquely directed forwards, rather waved. The 
lower discoidal nervule takes its rise not far from the upper one ; the first two median nervules stand consider- 
ably farther apart the one from the other, as in 7. amrita, and the costal nervure of the hindwing ends not far 
from the apex of the costal margin.’’ (/e/der, |. c.) 3 , L 
“ Mae. UppPERSIDE, oth wings bright violaceous-blue. Forewing with a broad fascia crossing the apical 
half of the cell and terminating a little above the posterior angle, the costal margin beyond the fascia, the 
apex and outer margins all blackish. Azxdzing with the costal and posterior margins (the last as far as between 
the third and second median nervules) broadly blackish, after which to the anal angle the posterior margin is 
whitish, containing a transverse black spot on each side of the first median nervule ; a black outer marginal line. 
Tail whitish, more or less blackish at the base. UNDERSIDE, /ovewing pale brownish-ochraceous, more or less 
pale bluish-green at the base and towards the posterior angle. Hindwing pale bluish-green, the costal and outer 
margins (the last as far as the median nervules) pale brownish-ochraceous ; the white anal angular patch 
above larger beneath, inwardly margined with a much-waved black line, and containing an additional black 
spot at the extreme anal angle. Tail beneath witha medial blackish line. Body and éegs more or less con- 
colorous with the wings.” 
“* Of this beautiful and scarce species the writer, like Felder, is only acquainted with the male sex, and the 
female still remains to be discovered.” (Distant, 1. c.) Piaf 5 
I have not seen this species. There is a remarkable difference in the length of the tail in the specimens 
figured by Felder and Distant, that part being in Felder’s specimen °8 of an inch long, in Distant’s °5 of an inch 
only. There is a considerable difference also in the outline of the forewing, Felder’s specimen having the apex 
produced, the outer margin concaye, Distant’s the apex bluntly rounded, the outer margin convex, Otherwise 
the two figures agree fairly well, 
51 
