COCYTIA. By Dr. A. Seitz. 
2.T 
resembling the colour of wine, the sub marginal band is deeply dentate, and at the margin of the forewing there 
are dark spots. Hindwing orange with spots in the apical part and at the costal margin, the apex -.haded dark. 
Burma. 
D. fasciata Btlr. (20 e). Head and body as in hear Guyana, but the collar without dot and the patagia jowMia. 
with a black streak. Forewing dark greyish-brown, at the costa 3 black strigae, in the cell 2 small spot:- ; at 
the cell-end a black spot, the basal part of the forewing being spotted black, too. Ceylon. 
D. marchali GvAr. (26 c). Head and thorax whitish-grey, abdomen orange, all three potted black. marckali.. 
Forewingwith dark, arcuate, ante-and postmedian bands, at the base and in the cell blackish punctiform spot . 
Hindwings orange. Southern India. — In the form intermedia Hw/fjs. from Southern India there are ome >.n^rrnedw. 
more dark bands before and at the margin. — In figurata Moore from Burma almost the whole forewing i- Ihp'raUx. 
suffused with dark; in ab. nebulosa Wkr. it is clouded dark and light. mtrutoea. 
D. marmorea Btlr. (= piepersiana Snell.) (26 d). This species is the only one occurring out of Con- murw/rrm. 
tmental Asia (resp. Ceylon). Its range extends across the Sunda Islands (Celebes) and Northern Australia. 
D. abletis Leech (26 dp This species, not lying before me, probably also deviating more from the other 
species, is described from Kiukiang, being the frontier of the pal caret ic region. As most of the JJirjarm. it is 
apparently rarer than most of the Hypsids of other genera are in their patriae. 
IV. Subfamily: Cocytiinae. 
This most peculiar lepidopteral species forming several species we place here with all restriction. All 
that we can say about it is that it is not particularly allied to any lepidopteral group known hitherto. A clumsy 
body almost like that of a rose-chafer exhibits black-veined hyaline wings. The uncommonly long antennae 
are shaped just as conspicuously as the greenish-golden palpi. The insect entirely justifies the- establishment 
of a separate family, but in our work it ought to have been inserted either before or behind the Arctndae being 
that group of lepidoptera with which it shows the most analogies; but then it would have been either ranged 
among the Syntomidae or the Lymantridae. The latter position, between the Lymantridae and Xyctemerinae. 
is probably scarcely to betaken into consideration; by its position behind the Syntomidae it would have disturbed 
the transition to the .Nolinae with which it has: nothing in common. The Cocytia are confined to the Indo-Chinese 
Archipelago. The name is a little bold owing to its aptness of being mistaken for Hubxee’s genus Cocytim , 
an American genus of Geometrids. Above all, the name of Gocytiidae would have then to be replaced by another 
in order to avoid mistakes. 
1. Genus: Cocytia Bed. 
The forms having been distinguished in this genus, are so closely allied that they can scarcely be separated 
as good species; they seem to be regarded as local ra.ces the more so, since in spite of the confined range of 
the whole genus nowhere more than one form seems to occur. The structure is clumsy: on the very strong 
thorax we notice a head with a broad forehead and large diurnal eyes; the first palpal, joint is moderately long 
and curved, the 2nd rises vertically upwards as a subuliform needle. The antennae are ineornparatively Jong: 
they are almost four fifths of the length of the costa and are expanded into a club before the pointed end, being 
in the % about twice as thick as in the $. The thorax is covered with appressed metallic hair and scales; in 
the legs, which are rather short and stout, the hips are uncommonly long and strong and, like the femora and 
tibiae, covered with metallic hair; the posterior tibiae at the ends with strong spurs. Forewing triangular, 
in the % rather pointed with a smooth margin, like the ovoid hindwing. All the wings are hyaline with dark 
margins, veins and intermediate veins. The neuration itself has probably scarcely any analogy. Owing to 
the oblique position of the upper discocellular on the forewing, the upper cell-angle is very much produced 
towards the margin, the lower median vein of the ^ is very much curved. The upper median vein (the so-called 
3rd radial) and the two radials rise separately, but very near round the lower cell-angle. On the hindwing the 
cell is closed by a remarkably feeble upper discocellular. The whole habitus of the insect is so unique that 
it is impossible to mistake it. They are said to be fond of drinking from blossoms on which they settle down 
with closed wings; they are fond of the hot sunshine and seem to be perennial. 
durvillei Bed. (= chlorosoma Mah. V.) (26 g), the form described first, occurring in New Guinea, durrUM. 
shows transparent wings with broad black margins and thick intermediate veins, the reddish-orange subbasal 
spots on the forewings large. — In veitschi Btlr. (26 g) the wings are not as of white, but as of yellowish glass, 
but just as transparent as those of durmlhi, and the black margins of the wings are narrow; from Batjan. — 
ribbei Druce (26 g) has white, rather slightly lustrous bluish hyaline wings, the internervaJ stripe.- are shorter ri}M>. 
than in durmlhi, the forewing without the yellowish-red basal spot; Aru Islands. — chlorosoma Btlr. likewi-e cKtr/rw/mu. 
originates from Aru (<chlorosoma Mob. <k V. refers to varying durvillei), has light not yellowish hyaline wing 
with narrow black margins; the internerval stripes are shorter, finer, and proceed more abruptly from the 
margins. The most remarkable deviation is a form originating from the Timor Laut group, which was -eparated 
