94 
GELASMA. By L. B. Prout. 
An Indo-Australian genus, represented in Africa by Antharmostes, which differs chiefly in the more 
or less crested abdomen. The few Chinese and Japanese Gelasma have been given in Vol. 4, p. 22, but those 
which inhabit the borderland between the Palaearctic and Indian Regions are also mentioned here. 
Section A ( Chrysochloroma Warr.). Hindtibia of $ not dilated, palpus of $ with 3rd joint much elongate, wings 
bright or deep green, spotted with red the hindwing (especially in the 5) crenulate and only weakly angled. 
eledrica. G. electrica Warr. (§ = rubritincta Warr.) (Ilf). Sexual dimorphism strong, the deep blue-green, 
with only a little red shading on the cell-marks, the $ bright green with the red increased, especially on the 
hindwing, which develops an ill-defined apical cloud. Ron Island and the coastal regions of New Guinea, 
the type from Humboldt Bay. $$ from Dampier Island seem to agree, but I have not seen a A from that 
saturata. locality. — saturata Warr. ($ = fuscimargo Warr. ) (4g, as rubritincta), from the Snow Mountains, sometimes 
(as in the specimen figured) differs little in the $, but the typical pair have an almost complete, broad border 
herbida. on the hindwing, in the $ reddish, in the A more brown. — herbida Prout. $ much less deep green than in the 
two preceding forms, $ without the apical clouding of the hindwing, the sexes consequently much less dis- 
rulcanica. similar. St. Matthias Island. — vulcanica subsp. nov. Markings nearly as in herbida, coloration darker and duller, 
in the £ intermediate between that race and electrica. Vulcan Island, November 1913— January 1914 (Meek’s 
expedition), 8 <$<$, 1 $ in Mus. Tring. In all the forms of this species the underside is blue-green. 
G. meeki differs from electrica (Ilf) in having the $ hindwing beneath bright orange-ochreous. The upper- 
side has not in any of the races the blue-green colour of name-typical electrica. The $ is unknown, except in 
meeki. the case of m. malthaca. Typical meeki Warr., from the Trobriand Islands, is the largest form and is of a 
beautiful deep but bright green colour. The orange colouring of the hindwing beneath extends on to a consi- 
bisnmrcken- derable portion of the forewing. — bismarckensis subsp. nov. (Ilf) differs little from the preceding but is rather 
sts ' smaller, with a more conspicuous pale line at the base of the fringe and with the orange on the forewing be¬ 
neath generally more restricted. Distributed in the Bismarck Archipelago, the type from Feni Island, E. of 
malthaca. New Ireland, where Eichhorn obtained for the Tring Museum a good series in June 1924. — malthaca Prout 
is on an average a little smaller than bismarckensis, typically of a lighter, more yellowish green, the underside 
almost as in that form. Louisiades, the type from St. Aignan, whence comes also the only known $ of the 
collective species; this is extremely like a small $ megaloptera (Ilf), except for appreciably more crenulate 
distal margins. 
megalo- G. megaloptera Lower (= subalbida Warr. = hypoleucus Lower) (Ilf). Although Lower took the 
ptera. <£ f G j )e a separate species and re-named it hypoleucus, the sexes really differ very little, though the <3 has the 
distal margins slightly less rounded and the cell-spot of the hindwing generally smaller. The larva has been 
found in numbers by Mr. E. P. Dodd, inhabiting the nests of the green tree-ant. Only definitely known from 
N. Queensland; a A an d a $ from the Key Islands seems, however, to agree with it. 
Section B. Hintibia of d nearly always dilated, palpus of 2 with 3rd joint moderate, wings rarely bright 
green, not spotted with red, hindwing generally sharp-angled or tailed. 
nubecula. G. nubecula Warr. resembles the subgenus Chrysochloroma in size and shape, but has the $ palpus 
much shorter, the A hindtibia dilated, with a short terminal process, the wings less bright, more greyish green. 
Cell-dots small, black; terminal line red-brown; characteristic is a brown irroration on the central area of both 
wings, a slighter subterminal irroration also discernible. British New Guinea, the original specimens coming 
from Sariba Island. 
prasina. G. prasina Warr. This species and the group which follows form the genus Thalerura Swinh., charact¬ 
erized by the sharply tailed hindwing, but prasina is in a measure transitional. It is of a comparatively bright 
bluish green, yet not so bright as the Chrysochloroma group. Expanse 40 mm; distal margin of fore wing gently 
convex, except just behind the slightly produced apex; a dark purple-grey terminal line; fringe cream-buff, 
strongly marked with dark purple-grey. Bhutan, only the type $ known. 
panterpna. G. panterpna West (Ilf) has also strongly spotted fringes, but is exceedingly distinct on the underside, 
which is honey-yellow as far as a narrow whitish post median band, to which succeeds a dark grey subterminal 
one, While the borders are pale green. Luzon. 
inaptaria. G. inaptaria Walk. (= urapteraria Walk.) (12 e). Distal margin of forewing very straight in the $, in 
the $ shaped more nearly as in prasina. Fringes unspotted. A very heavy blackish marginal band on the 
underside shows through faintly on the upper. Antennal pectinations of long (6 times diameter of shaft). 
Assam. 
•s tubmacu- G. submacularia Leech has been briefly described in Vol. 4, p. 22. Compared with inaptaria (12 e), it 
lana. differs in having the <§ antennal pectinations less long, the wings somewhat darker (greyer), the dark marginal 
adaptor la. bands reduced, developed only as blotches at tornus of forewing and apex of hindwing. W. China. — adaptaria 
form. nov. ( ? sp. nov.) has hitherto been mixed among inaptaria, which it greatly resembles in colour and in 
the rather distinct white lines of the upperside, whereas those of submacularia are faint; but the shorter an- 
