258 
XANTHORHOE. By L. B. Prout. 
caustoscia. 
insularis. 
ioxantha. 
finitima. 
pallida. 
vulgaris. 
albiapicata. 
fulvinotata. 
bifulvata. 
coeruleata. 
monastica. 
line of hindwing as irregular as in any sordidata, that of forewing much less so. Mount Goliath, Dutch New 
Guinea, January 1911, only the type $ known. It may be regarded as a link with Aeschrostoma. 
X. caustoscia Meyr. (25 1). The largest Hawaiian Xanthorhoe and distinguishable by its dentate hind¬ 
wing. Otherwise not at all a striking species, though some slight reddish or purplish suffusion relieves the dark 
ground-colour. The pale subterminal line is in the $ better developed and forms a conspicuous white dot behind 
the 3rd radial. Pectinations of the antenna fairly long. Maui and Lanai, 3000 to 5000 feet. 
X. insularis Bull. (25 1). Less brown than caustoscia, the wings elongate, the termen of the hindwing 
scarcely waved; median band distally much more sinuate and lobed. Variable, the $ smaller, whiter and more 
sharply marked than the <$. Hawaiian Islands, at high altitudes. 
X. ioxantha Meyr. (25 1). Distinguished at once by the orange ground-colour of the forewing; hindwing 
except at abdominal margin, paler. Our figure shows the type of maculation. A $ from Kaholuamano, Kauai 
(Hawaii), 4000 feet. In the absence of the <J, the systematic position is uncertain. Perhaps related to Euphyia 
leucoxyla. 
X. (?) finitima Walk. (25 1), founded on 4 $9 from the Isle of Pines (Kuni) has also been tentatively 
referred to Xanthorhoe but may probably, like "XX leucoxyla Meyr. [Euphyia), be found to have simple <$ 
antenna. Excepting the type, which has lost one hindwing, all are torn and more or less rubbed, but they 
evidently do not vary and our figure of the type will make it recognizable. Face with pointed cone; palpus 
about twice diameter of eye, 2nd joint heavily long-scaled. Distal margins almost smooth; hindwing somewhat 
elongate anteriorly. Median band of forewing little narrower posteriorly than anteriorly, in part pale, at least 
round the minute cell-dot, 2 or 3 antemedian and 3 postmedian lines on it fairly distinct. Underside weakly marked. 
X. pallida Rothsch. (25 1). Palpus nearly 2, rough-scaled. Pectinations longish (4 or 5), apical 2 / 7 of 
antenna non pectinate. Abdomen slender. Scaling smooth and thin. The hindwing, which is white and almost 
unmarked above, is adorned beneath with a very characteristic fuscous subterminal band its proximal boundary 
(near the postmedian) a merely waved and very little curved line, its distal (indicating the white subterminal 
line) very irregularly and strongly dentate the prongs coming between the veins. The forewing beneath is also 
more strongly marked than above and the hindwing (though unfortunately rubbed) shows the remains of several 
dark lines between the base and the postmedian. Dutch New Guinea: Carstensz Peak, Oetakwa River, 13 000 
feet, February-March 1913 (A. F. R. Wollaston), the unique type on the Tring Museum. The texture and 
facies show the characteristics of a high-mountain species. 
X. vulgaris Rothsch. (26 a). Palpus about as in pallida, pectinations somewhat longer and continued 
to nearer the tip of the antenna. A very simple and unostentatious brown-grey species, showing very little 
variation. Underside with the fore wing less, the hindwing more, strongly marked than above. Dutch New 
Guinea: Oetakwa River in numbers, from 4000 to 6000 feet; also 2 $$ have been taken on Mount Goliath, 5000 
to 7000 feet. 
X. albiapicata Warr. (26 a). This and the succeeding Papuan species, as far as albirivata, probably 
form a natural group, with the frontal tuft generally slight, the palpus shortish, the pectinations short or mod¬ 
erate, the coloration (as least of the hindwing and underside) dark and glossy. From the other 2 small species 
of the group, albiapicata is at once distinguishable by the sharply white mid-subterminal dot; there is usually 
also much pale or white marking in the apical region (but this is variable) and always the pure white anterior 
half only of the postmedian line arrests attention. Owen Stanley Range and Mount Goliath. 
X. fulvinotata Warr. (26 a) has more white markings than any of its neighbours and the large “fulvous 
brown patch between the postmedian and subterminal of the forewing always stands out conspicuously. Anga- 
bunga River and Biagi, with albiapicata. 
X. bifulvata Warr. (26 a). Much darker, the bright brown outer shade less conspicuous but extended 
into a band, a similar proximal one replacing the much greyer band which occupies the same position in f ulvi¬ 
notata. Underside without the white micl-subterminal spot which is reproduced from the upperside in fulvi¬ 
notata and with the hindwing more regularly rippled with whitish lines. Angabnnga River. 
X. coeruleata Warr. (26 a). Much larger, pectinations proportionally nearly as short as in bifulvata. The 
whitish markings on the wings strongly tinted with a somewhat metallic blue, the fringe-spots white; a warm 
brown patch on forewing placed as in f ulvinotata but occasionally obsolete. Owen Stanley Range and Gooden- 
ough Island; type from Angabunga River. 
X. monastica Warr. (26 b). Variable in size, otherwise almost constant. Forewing more unicolorous, the 
only strongly dark lines being the two which bound the median area and a median well outside the cell-mark; 
