DICALLANEURA. By H. Frtthstorfer. 
786 
just as preponderantly white bands as savitri from Penanghill. Island of Banka. — periya sub-sp. nov. the 
type of which originates from the Tring Museum like that of deniya, inhabits Bunguran of the Natuna 
Islands, where it was met from July to October. Just as the Banlca-form of savitri forms the transition to 
teutyra , periya forms it from savitri to sciurus from South Borneo. Upper surface dull and without any 
red-brown admixture, the light stripes of the forewing somewhat more prominent than in sciurus. The black 
maculae of the hindwings more conspicuous than in the branches of savitri enumerated so far. Under sur- 
schmts. face more intensely red-brown than in savitri, but yet with almost lacteous bands. — sciurus Fruhst., founded 
upon specimens of South East Borneo and of the lowlands of North Borneo, was recently captured by Dr. 
L. Martin also near Sintang on the Kapuas River in South West Borneo. Particularly the Q differs greatly 
from the 2 of the Sumatran and Perak-form, being above darker brown and exhibiting more grey than 
yellowish-brown longitudinal stripes. Beneath brighter than the 2 of teutyra, the dirty-white bands with 
siri.r. a bluish periphery.— strix Fruhst. (138 b), an alpine form of North Borneo which may replace A .aita there. 
A 2 characterized by more sharply defined and still broader bands than we find them in sciurus , which 
becomes especially conspicuous on the under surface of the forewings, where, towards the apex and anal 
part, the beginning of a purely white band appears. The hindwings are above and beneath characterized 
by a broad, purely white subanal band, and the black spots reminding us of the eyes of an owl are di- 
atlas. stinctly encircled in white. Kinabalu. — atlas Nicev. (138 b) of which we reproduce a A from beneath, 
largely agrees above with A. savitri strix from Kinabalu in the scheme of markings, atlas, however, may 
be regarded as the branch of the collective species with the greatest deviation from the general habitus, 
and almost considered a distinct species. Though the 2 is paler than the A, yet it is by far the most in¬ 
tensely red-brown form of the group of species of Archigenes. The proximal oblique band is very 7 broad, 
yellowish-white. Described according to specimens I found in great numbers on the Gede. atlas does not 
occur there at altitudes of less than 1200 m and I found it at the skirts of the forests Avhich were dripping 
with wet, particularly above the Botanical Gardens of Tjibodas on the northern slope of the Volcano Gede, 
but I cannot remember of having seen them on other mountains of West Java. 
4. Genus : Dicallaneura Btlr. 
* 
This sharply limited genus exclusively occurs in the Papuan region, where it is represented in a small 
number and — with one exception —■ of sexually heteromorphous, magnificent species, of which we may expect 
some more new forms. In this genus the differentiability, caused by climatic, geographical and mountainous 
influences, attains its climax. In the chief island of New Guinea one species alone is divided into about 
6 or 7 races. Structurally, Dicallaneura differs from all its allies by the very much proximally bent clis- 
cocellulars of the forewings, so that a conspicuously broad and short cell is jiroduced. The first subcostal 
vein is grown together with the costal, the costal of the hindwings is strongly curved like in Taxila and Prae- 
taxila, the precostal stunted. The cell of the hindwing towards the base greatly expanded, the posterior 
discocellular very long. Eves naked. Tegumen with a point like the sting of a scorpion, but very delicate, 
the valve in the shape of a finger. Penis-case distally with 4 spines. Tegumen with small ventral, uncom¬ 
monly long, sharply bent horns as pointed as a needle. The butterflies live in the forests and behave like 
the M&isum-species. Some forms are common, others rare though widely distributed, the alpine species hitherto 
very ra,re, having come to Europe only' in single specimens. 
hu com phi*. D. leuconielas R. and J. (140 el, an important discovery of the last years, nearly the only Nemeobiidi 
known with equally coloured sexes. Basal part of the forewing white, at the ground densely dusted in grey. 
Hindwing with a white costal border. Apex of the tail of the 2 white. Under surface with a. red-brown distal 
border, a large, blackish-brown, shaded-off spot at the cell-end. Hindwing with a triangular spot in the centre 
of the costal area, otherwise grey like the base of the forewing, with reddish-brown streaks. Apical part of 
the hindwing light orange-yellow, in the submarginal zone tiny white stripes. Flying in March, Mambare 
River, British New Guinea, from an altitude of 5000 ft. 
D. ribbei is easily recognizable by the AA being above throughout dark ultra-marine. The 2 is above 
scarcely discernible from those of D. decorata and D. pulchm, orange-yellow with a black apex of the forewing 
and the black submarginal spots of the hindwings characteristic of the whole genus. The under surface is 
nearly identical in both sexes. Fore wing with a black median part shining slightly in dark blue. Hindwing 
like in arfakensis (139 b), the yellow transverse bands similarly formed as in D. pulchra (139 b), but still no- 
ribbei. ticeably undulate. - — ribbei Rob. occurs in the Aru Islands, but it is rare there. The 2 is not hi my col¬ 
lection. The A exhibits a somewhat darker brown total colouring of the under surface than arfakensis-A- 
him on. birana subsp. nov. lies before me in a 2 from the Tring Museum differing from a ribbei- $ of the Aru Islands 
of the same museum by a more prominent black median area of the forewing and narrower yellow bands of 
arfakensis. the under surface of the hindwings. Etna-Bay. — arfakensis Fruhst. (139 b A 2) differs from ribbei by a 
more extensive black median zone of the forewing and the orange, instead of red-brown, colouring of the 
hindwing. Described first from the Arfak Mountains in North West Dutch New Guinea, but the race seems 
