GELASMA. By L. B. Prout. 
97 
G. albitaenia Prout (4 f). Here begins a group in which the ground-colour may be regarded as white, albitaenia.. 
the green colouring being laid on in more or less dense irroration, the lines green. The presence of a strong white 
subterminal line, in this and the following species, is a rare character in the Hemitheinae. Snow Mountains 
(type), Weyland Mountains, Hydrographer Mountains and Goodenough Island. 
G. spumata Warr. is very near albitaenia (4 f) but rather broader-winged and with some slight differences spumata. 
in the shape of the markings. Most easily distinguished, however, by the presence of a strong blackish cell-dot 
on each wing. Dutch and British New Guinea, the type from the Owen Stanley Range. 
G. niutatilinea Prout. Iridescent bluish-white, the elongate cell-marks and the bands yellow-green, mutatilinea. 
much like some Indian Iodis, but with a frenulum. Palpus loliger than in thetydaria, antennal pectinations 
ceasing shortly beyond the middle of the shaft, wings narrower, the bands less broad, the postmedian receding 
from the distal margin anteriorly. Khasis. 
G. thetydaria Guen. (11 h). Distributed from S. India to W. China and recorded by Semper from the thetydaria. 
Philippines. Palpus in both sexes rather short (1)4 times as long as diameter of eye). Antenna of 4 pectinate 
to two-thirds, the branches rather long. 
G. bifasciata Walk. Rather larger than thetydaria, the 4 antenna pectinate to about the middle. The bifasciata. 
green bands broader, more deeply coloured, the postmedian less bent, particularly on the hindwing. Assam 
(type) and Sikkim, much rarer than thetydaria. 
G. atrapophanes Prout and the two following species have the bands still broader than in bifasciata. atrapo- 
The antemedian of the forewing reaches to the base and that of the hindwing runs along the abdominal margin. phanes. 
The 4 atrapophanes is unknown; the $ has an expanse of 34—38 mm, the hindwing scarcely more angled 
than in convallata, the fine white line on the basal band of the forewing not incurved behind the median vein, 
the postmedian band of this wing rather straight, traversed close to its distal edge by a fine white line. British 
and Dutch New Guinea. 
G. eumixis Prout (11 h). 4 sometimes difficult to distinguish from that of orthodesma, though nearly eumixis. 
always larger. Terminal joint of palpus a little smaller. In the $ this distinction becomes remarkably pregnant, 
the terminal joint being quite short in eumixis, strongly elongate in orthodesma. Dutch and British New Guinea. 
A $ from New Britain probably represents a separable race. 
G. orthodesma Lower (12 f). The name-typical race has the green bands on an average somewhat less orthodesma. 
broad than in the New Guinea forms and eumixis, the distal edge of the postmedian band of the forewing 
straighter. It never attains the large size of some New Guinea examples. North Queensland (loc. typ.) and the 
Louisiades and (?) Burn. — albifusa Warr. closely resembles eumixis except in the palpal structure (see above), 'albifusa. 
New Guinea, Mysol, the D’Entrecasteaux Islands, New Ireland and New Britain, the type from Fergussen Island. 
G. balteata Warr. (4 f, as bathrata) has the colouring of the preceding group but the green bands quite balteata. 
differently placed. Shape nearly as in atrapophanes, palpus slender, with the 3rd joint in both sexes relatively 
long (in atrapophanes short). Biagi (British New Guinea), the type 4; Mount Goliath (Dutch New Guinea), 
2 5$) one of which we figure; Weyland Mountains, 1 
G. viridaurea Warr. (= costipicta Warr.) (11 d) is the first of a group of species, mostly of small size, viridaurea. 
which evidently intergrade with Prasinocyma ; we have retained provisionally here those which have the angled 
hindwing and general habitus of Gelasma. viridaurea shows stronger colour contrast than the species which 
follow, in that the ground-colour is suffused with blue, while the markings are yellow-green. Palpus nearly as 
in balteata. Ron Island (the type of viridaurea with the bands discoloured to yellowish), New Guinea and the 
D’Entrecasteaux Islands. 
G. bicolor Warr. (11 d). Paler green than viridaurea, the bands narrower, the diffuse green cell-spots bicolor. 
replaced by sharp black dots. Palpus with 3rd joint considerably longer. Hindwing less elongate, with distal 
margin slightly crenulate. Owen Stanley Range. — privata Prout. is a form, or very closely allied species, from privata. 
Mount Goliath, with the bands still slenderer, more clearly white-edged, the hindwing with the tail rather weaker 
and the postmedian line less strongly bent. Also from near Oetakwa River, Snow Mountains. 
G. cyanoconias sp. n. 4 , 25 mm. Structure about as in bicolor (11 d), palpus scarcely so long; hindwing with cyanoco- 
the crenulations and tail still slighter than in privata, forewing with apex slightly less acute, termen slightly nias. 
less oblique. Colouring similar, but with more copious metallic-blue irroration, thus intermediate towards the 
colour of viridaurea-, cell-dots small, yellow-green, accompanied by some slight green suffusion; bands about 
as wide as in viridaurea, but accompanied by distinct dentate whitish lines; postmedian of forewing much less 
sinuous than in those species, but with a fairly deep inward tooth in cellule 4 and a moderate inward curve 
at fold. Talasea, New Britain, March-April 1925 (A. E. Eichiiorn), type in Mus. Tring. 
