GERYDUS. By H. Fruhstorfer. 
815 
panormis Elio., the apex cut off, the distal margin finely dentate. Hindwing projecting in the anal angle, deeply 
indented. Upper surface unicolorously blackish-brown. Under surface of the forewings dirty white, the whole 
upper surface delicately marbled with greyish-brown, with the exception of a submarginal zone having remained 
whitish. The hindwings, however, greyish-white, only cpiite slightly clouded in a brownish grey, but with a 
prominent, sharply dentate, blackish band being interrupted in the median region. Island of Buton, April 1906. 
A. multistrigatus Nicev. (141 h), the giant of the genus. $ above brownish-grey with a crescentiformly multistri- 
bent sexual spot. $ with a yellowish white oblicjue band of the forewing. Under surface greyish-brown with gatus. 
prominent, darker brown longitudinal bands resembling G. symethus. The genital organs with very large uncus- 
sheets which are extraordinarily broad and exhibit a very blunt tip and apparently very long, ventral, small 
hooks. Valve particularly considering the size of the uncus uncommonly short, trough-shaped indented at 
the distal end and remarkably broad. The species is distributed from the Kumaon-Himalaya as far as Bhutan. 
Common in Assam, mentioned also from the JNTaga Hills and the Shan States. 
A. drumila Moore (= insignis Stgr.) (141 i, misprinted into dumila). A magnificent species on which drumila. 
Rober has founded the genus Miletographa (1891). Presumably flying only in spring, everywhere rare. Swinhoe 
even reports only of 2 $$ which he knows in London, and he presumes that de Niceville has not at all seen 
the <$. Sikkim, Assam (one $ of each in the Coll. Fruhstorfer), Bhutan (Bingham). extraordinarily similar 
to the $ of A. multistrigatus, though with a more sharply projecting apical point of the forewing. Under surface 
grey with prominent red-brown bands. $ preponderantly white, the wings bordered with brown. Under surface 
yellowish with a white discal area of the forewing and quite delicate apical bands of the hindwings. 
A. aphthonius Fruhst. <$ somewhat similar to the $ of drumila, as it is figured by Swinhoe (Lep. aphthonius. 
Inch Vol. VII, t. 615 fig. 1 and 1 a). There are, however, the following differences: the apex of the forewing 
less sharply projecting, and besides the distal margin of both wings appearing more indistinctly dentate. 
Ground-colour somewhat lighter, smoky brown. The band beyond the cell of the forewing still more indistinct, 
without any whitish admixture, but on a yellowish ground densely dusted over with grey. Under surface pale 
greyish-yellow, without a prominent anteterminal band of the fore wing and with but one feeble, distall y 
dentate, brown transverse band of the hindwing, similarly as in drumila -$. and as such recognizable by 
the anterior median of the forewing being slightly thickened. The vein itself, as far as it is standing separate, 
of a bone-yellow, dull horny brilliant structure and colouring, surrounded by a grey androconial area. The 
bare place of the median vein is shorter than in multistrigatus Nicev. $ at once discernible from the of multi¬ 
strigatus by its rounder wing-contours, considerably smaller shape and a lighter brown colouring. The under 
surface differs already by the absence of the subbasal and discal macular series, by which it differs also from 
drumila-^. The $ forms an interesting and complicated transition from the $ of multistrigatus to the drumila -$. 
It has on its upper surface about the scheme of colouring and marking of the multistrigatus- $, whereas the 
under surface very decidedly inclines towards the $ of drumila. Upper surface lighter than multistrigatus 
which is especially conspicuous on the dark yellowish-grey striped hindwing. Hindwing besides more sharply 
dentate. Cilia of a purer and more extensive light-yellow. The transcellular band of the forewing as a rule 
lighter, of a purer cream colour. Under surface very near to the $ of drumila and chiefly only differing by the 
whitish basal and discal region of the forewing being confined to some intranerval streaks. Hindwings almost 
entirely as in drumila, but the postdiscal transverse band crossing all the medians is faded. It is, however, 
not impossible that during the rainy period there will be yet found $$-specimens of aphthonius that are still 
more allied to the drumila- Tenasserim, Tandong. Collected by H. Fruhstorfer in May (dry period) 
at an altitude of about 1200 m. If Miletographus Rober can be maintained as a subgenus, A. aphthonius Fruhst. 
forms the second species belonging to it. Most probably there will be found vicarious types of aphthonius in 
Tonkin, Annam, Siam and Yunnan. 
3. Genus: Cweryiliis Bsd. 
. Although this genus exhibits remarkable differences from the Allotinus neither in the neuration nor 
in the sexual organs, yet it is easily discernible in its exterior from the the other Gerydinae by the shape 
of the wings, the peculiar spotting of the under surface of the forewings and the sharply defined bands 
particularly on the hindwings. The genus also contains the most imposing of all the Gerydinae and, at the same 
time, the most widely distributed species. The second subcostal of the forewings in some species rises before 
the apex of the cell, only the middle and posterior discocellulars do not run rectilinearly as in Allotinus, but 
slightly curved. The base of the anterior median is, with the exception of one species, always thickened. Di¬ 
stinctly visible accumulations of androconia, however, as in Allotinus, are only noticed in G. boisduvali. Doherty 
already studied the clasping-organs and described them, in 1886, to be very long, of a peculiar shape, broad, 
thin and sheet-like, similar to the Papilio-valves. But we owe the merit of having recognized the chief mark 
of the genus to Westwood who, in 1852, wrote: The legs are slender, scaled, pressed together, the tarsi of all 
feet remarkably prolonged, expanded and entirely flattened out. The tarsus of the forefeet as long as femur 
