Icucocras- 
pis. 
insignata. 
nag a. 
anceus. 
subdentata. 
socrates. 
cincrca. 
mislcini. 
sericeus. 
rufescens. 
550 ACOSMERYX. By Dr. A. Seitz. 
on vine-leaves (Hydrangea which the larva of Ampeloph. rubiginosa feeds on, and Balsamineae on which the 
larva of Pergesa elpenor feeds). The exterior of the larva, however, save some oblique. stripes and the horn, 
is exactly that of a larva of Acosmeryx or Ampelophaga. 
A. leucocraspis limps. The large brown imago of an expanse of about 80 mm chiefly differs from a 
large Ampelophaga in the absence of the median stripe across the head and body, which is not absent in any 
genuine Ampelophaga. Forewing dark brown, especially in the basal portion; instead of the parallel darker 
transverse stripes there are irregular, small costal clouds. The marginal area is proximad bordered by a chain 
of small dark crescents. Head and thorax bordered with white. Assam. - - insignata Mell is a northern form 
in which the markings are duller or die away; of the chain of crescents before the marginal area only the 
middle portion is distinct, the costal portion disappears in the brightening of the apical third of the wing. South 
China. — Larva similar to that of Ampeloph. rubiginosa , with a light subdorsal stripe and dull oblique stripes 
below it, distinguished by the very thin and above curved horn of 20 mm length. On Vitis. — Only few speci¬ 
mens are known of this species. 
49. Genus: Acosmeryx Bsd. 
About 14 forms are known today of this genus which has been characterized in Vol. II, p. 251. It is 
quite Indo-Australian except few species penetrating into palaearctic regions. 
A. naga Mr. (- ■ metonaga Btlr., shervilli Bsd., anceus Leech p. p.) (Vol. II, pi. 39 c). At the time when 
we dealt with this genus in Vol. II, p. 251, this species which is not rare in Japan, was not yet known from 
China where it has been ascertained by R. Mell in the meantine; Jordan’s statement in that volume is to be 
supplemented accordingly. It is very similar to castanea (Vol. II, pi. 39 e) though distinguished by its greyer 
colouring and more distinct marking. As to further particulars cf. Vol. II, p. 251. — Larva very similar to 
that of Ampelophaga, dark green with a yellow subdorsal stripe and lighter or darker green, hardly noticeable 
oblique stripes below it. The 4 first rings are defined on the dorsum in the shape of a thoracal shield which 
is bordered by yellow and behind it by red-brown. The horn of the grown-up insect is small, green, curved 
below. On Actinidia fulvicoma, perhaps also on vine. North India, South China, Japan. 
A. anceus Stoll ( = cinnamomea H .-Schdff., daulis B.sd., meskini Maass., mixtura Wkr.) (63 c). Much 
lighter than naga, more of a pale ochre colour, the irregular transverse lines more indistinct, the transverse 
shadows only marked by their borders. Under surface ochreous loam-coloured, the darker marginal band badly 
defined. North Australia, New Guinea and the neighbouring islands, as far as the Moluccas. subdentata 
R. <£• J. is the form representing the species in the north and extending from Sikkim to the Sunda Is.; here 
the forewing is more elongate and the margin projects more on the third radial, where it forms a sharper angle. 
Larva similar to the preceding species. The species is common nearly everywhere in its range. 
A. socrates Bsd. has a shape similar to anceus, but the colouring is dark greyish-brown. Forewing with 
a dark, distinctly light-centred median spot. — In the form citierea Btlr. (63 d) the forewing is covered with 
lustrous whitish-grey scales especially above the centre of the inner margin and in the apical third. This form 
occurs from Sikkim to Java, whereas the typical socrates extend from the Khasia Hills, Sumatra, Borneo to the 
Philippines. Small specimens of socrates were ascertained in South China. — Larva (according to Semper) 
dark green with a blue-green head, an anteriorly yellow, posteriorly white subdorsal stripe which is above 
bordered with red-brown, below it there are small blue spots and flat yellow oblique stripes shaded with green. 
Horn and pectoral feet violettish-red. On Cissus pedata and acida. — Semper’s figure of the larva is strangely 
similar to that of a Deilephila hy potions , and as Moore figures the larva quite differently, Semper may have 
made a mistake. — The species is considerably rarer than anceus. 
A. miskini Murr. ( = sericeus MisJc. p. p.) (63 c) is quite similar to socrates, but the apex of the forewing 
is gnawed out, so that there is a concavity below the apex of the wing (being deeper in the $). The margins 
of the hindwings are slightly angular, too. The marking is quite similar to that of anceus, but with a central 
dot. Australia and New Guinea. 
A. sericeus Wkr. (= anceoides Bsd., ancea Hmps.) (63 c). Forewing with very irregular bands. The 
scaling is of a bright silken gloss, and the apex of the forewing is gnawed out as in miskini. From North India 
to the Philippines. rufescens Mell is a South-Chinese form which is lighter on the whole than Indian specimens, 
browner, with a more intense red or copper tint and more distinctly defined lighter areas of the forewing. - 
The larva may look almost exactly like our description of socrates, except that the blue spots below the subdorsal 
stripe are absent: but the horn and ventral feet may also be green and the longitudinal stripe unicoloured yellow. 
On species of Vitis and Actinidia fulvicoma. Apparently not common. 
