CHAMAITA; ERIOMASTYX. By Dr. A. Seitz. 
127 
P. chamaitoides Rothsch. The $ resembles the $ of Cham, gri.seobasis Rothsch. Antennae light yellow- chamaitoi- 
ish grey; head and thorax creamy-white. Abdomen whitish-grey. Forewing semi-diaphanous milky-white, 
washed over with buff, somewhat iridescent; at the costa and margins few small, indistinct spots. Hindwings 
semi-diaphanous white. $ transparent. Length of forewings: <$ 13, $ 12 mm. Mambare River, British New 
Guinea, 5000 ft., February and March. 
P. simillima Rothsch. The $ greatly resembles chamaitoides, but it differs by a median line of spots simillima. 
and a postmedian dentate band. Angabunga River, a tributary of St. Joseph River in British New Guinea, 
at altitudes of 6000 ft. and higher, November and February. 
„Nudaria“ barnardi Taw. from Queensland is probably wrongly inserted in this genus: it may be a Thallarchn. 
13. Genus: (lliaiiiaita Wkr. 
The small, semi-transparent, white butterflies of this genus are sufficiently characterized by the $ 
antennae resting on a thick footstalk, which is more than twice the length of the antennae themselves. This 
is the transformed first antennal joint being enormously prolonged, very much thickened and round about 
covered with long ciliae. Another peculiarity of this genus are hair-combs along the costa of the forewing and 
besides a furry cover in the d in the basal part of the cell of the forewing, but only in one species. Distributed 
from India as far as the Papuan District and Celebes. 
Ch. trichopteroides Wkr. (= nudarioides Btlr., neuropteroides Hmps.) (13 d). Whitish, the hindwing trichopte- 
diaphanous, very faintly marked brown. Cell of forewing covered with a fur in the basal half. Assam, Sunda roidcs. 
Islands as far as New Guinea. 
Ch. nympha Moore (13 d). Forewing faintly tinged yellowish, without the furry cover in the cell, nympha. 
Scarcely half the size of the preceding. The peculiar antennal footstalk with shorter hair. Ceylon and Celebes. 
Ch. fascioterminata Rothsch. d : head, antennae, thorax and abdomen creamy-white. Forewings fasdotermi- 
semi-transparent white; three half faded, brick-coloured yellowish-brown oblique bands from the costa to naJa. 
the median are situate within the basal two thirds of the wing. Before the margin and on it rows of similarly 
coloured small spots. Length of forewings: 9,5 mm. Milne Bay, February. 
Ch. griseobasis Rothsch. In the $ the head, antennae and thorax are brick-coloured buff-grey; abdomen yrlseobasis. 
brownish grey, anal tuft buff. Forewing opalescent diaphanous creamy-white; a spot in the cell, a basal band 
and a subbasal one are brownish-grey. Hindwings opalescent hyaline creamy-white. In the $ the head, antennae 
and thorax as well as the abdomen are brick-coloured light grey, the forewings opalescent transparent yellow; 
a transparent grey spot in the cell and a band near the base. Hindwings opalescent hyaline creamy-white. 
Length of forewings: ^ 11, $ 13,5 mm. Mambare River in New Guinea, 5000 ft., in April. 
Ch. niveata Rothsch. $: head, antennae, thorax and abdomen white. Forewings and hindwings semi- nivcata. 
transparent snow-white, with a small, subtile, grey dot at the cell-end. Length of forewings: 11.5 mm. Mount 
Goliath, in March. 
14. Genus: ISrfomastyx Rothsch. 
In both sexes the first antennal segment is very long, like in Chamaita Wkr. On the forewing the costal 
is connected with the costa by various small intermediate veins, like in Schistophlebs; 4 subcostal veins, the 
1st anastomosing with the costal, the 2nd in the petioled with the 1st, in the $ rising separately from the 
cell. The 2nd and 3rd discocellulars of the same length and forming in the an obtuse angle directed distally 
The 1st radial rises from this angle; in the $ the 2nd and 3rd discocellulars are likewise angled, but inwardly. 
The 2nd median vein rises in the $ from the middle of the cell, in the $ before the middle; the 1st and 2nd 
median veins, the 3rd and 2nd radials almost at the same distance from each other. The 2nd subcostal vein 
and the 1st radial of the hindwing in the $ on a long footstalk, in the ^ on a very short one. The wings in 
the small with a broad scent-fold between the costa and cell. The latter is narrower, and the costal and the 
2nd subcostal vein inwardly curved. In the £ the anterior tibiae are reduced, the anterior tarsus thin, long- 
filiform, the middle femora densely haired, on the outside showing long, thin hairs, each of them at the end with 
an oviform vesicle, so that these knotted hairs resemble the ovated footstalks of a Hemerobius. Type: E. latus 
Rothsch. The genus differs from Schistophleg)s by the prolonged 1st antennal joint, not counting the venation, 
from Caulocera by the long antennal joint, and the presence of small intermediate veins in the costal area, from 
