EURYCUS; LEPTOCIRCUS. By Dr. K. Jordan. 
107 
P. encelades Hew. (49 b). Cell of the hindwing broad. Forewing elongate, with incurved distal margin; encelades. 
white, at the costal and distal margins black, the black distal area anteriorly extended to the apex of the cell; 
hindwing white with broad black distal margin. Under surface almost as upper, the dark parts paler, the 
light areas intersected by dark veins, cell of the hindwing with dark longitudinal streak, both wings with grey- 
white submarginal spots, which above are mostly only weakly indicated. The $ does not appear to be known. 
— North and South Celebes. 
2. Genus: Eurycus Bdv. 
An Aristolochia butterfly, which in many respects approaches P. polydorus. Differs from Papilio 
chiefly in the shorter, thicker, not curved club of the antenna, the much larger basal cell (so-called precostal 
cell), and in having the precostal vein curved towards the base. The $ has after copulation a ,,pouch“ like 
the $$ of Parnassius and of the South American genus Euryades. Legs as in the Indo-Australian Aristol- 
ochia-Papilios distinguished from those of the Aristolochia-Papilios of America by the deeper apical incision 
of the 5 th tarsal joint. Larva not yet described; we have been told by R. E. Turner that it is similar to that 
of P. polydorus; on Aristolochia. Pupa with girth; similar to that of the Aristolochia-Papilios, but much 
more cylindrical, the wing-cases not expanding and the dorsal humps of the abdomen small and almost coni¬ 
form; head truncate; with a horn at each side above and beneath; grey-yellow, striped and marbled with 
brown-yellow. — One Papuan species. 
E. cressida. G and $ similar in shape, different in colouring. G black, frons yellowish white, thorax 
and abdomen marked with red. Eorewing transparent, this part only scaled above, the margins dark, the 
base black; cell long, with black spot opposite the base of the upper median, a second black spot on the dis- 
cocellulars. Hindwing black, distally strongly rounded, abdominal margin even more slightly bent over than 
in polydorus, incurved behind the middle, a median band consisting of white patches extends from the costal 
to the distal margin; a row of submarginal spots red, more or less densely dusted with black, at the distal 
margin light spots. Underside as above, but the submarginal and marginal spots of the hindwing more distinct. 
$ much paler than the both wings for the most part transparent, yellowish smoke-colour; the light scales 
at the base of the forewing form thin undulate lines; the discocellular spots smaller than in the <$, the cell- 
spot replaced by an indistinct transverse patch, hindwing either transparent with indistinct markings, or 
similar to that of the <$, but the dark parts paler, the submarginal spots yellowish grey, beneath more or 
less distinctly reddish. The pouch towards the front with 2 lateral flaps and 8 central processes placed one 
over another. Both sexes vary considerably in size. The butterfly is common; it has a straight and rather 
feeble flight, but hastens away with great rapidity when it is frightened. It visits flowering trees and some¬ 
times swarms in numbers round flowering Eucalyptus. —- cressida F. (= heliconides Swains., $ = harmoniaE., cressida. 
harmonides Godt .) (49 c). Under surface of the hindwing with distinct marginal spots. In northern Australia, 
Thursday Island (perhaps also on the neighbouring islands), and on the small islands between Timor and Timor- 
laut, which perhaps it has only recently reached: Sermatta, Babber, Letti, Moa, Kisser. One of the GU before 
me from Moa has yellow instead of red submarginal spots on both sides of the hindwing. — troilus Btlr. Hind- troilus. 
wing without distinct marginal spots in both sexes; hindwing of the $ smoky black, with white median band; 
British New Guinea. 
3. Genus: IieptocirCUS Swains. 
Head broad, thorax thick, abdomen scarcely longer than the thorax; the antennae extend beyond 
the apex of the cell of the forewing; above scaled, the fine sensory hairs almost uniformly distributed over 
the scaleless underside, club short and broad; legs scaled. Neuration: in the forewing subcostals 1 and 2 from 
the cell, 8 and 4 long-stalked, 5 from this stalk nearer to the cell than to branch 4, anterior angle of the cell 
pointed; in the hindwing the cell very small. 
Forewing triangular, the liindmargin much shorter than the distal margin, before the middle a light 
oblique band, which is continued on the hindwing and is in part scaleless, between cell and distal margin a 
large, transparent, scaleless, triangular area, which is divided by thin black vein-stripes into 6—8 spots; hind¬ 
wing narrow and long, folded, produced into a very long tail, which is distally edged with white. G and 2 
similar; $ with^large ventral copulation-groove before the tip of the abdomen. 
Two species. Most nearly allied to the Kite-Swallowtails, from which Leptocircus is without doubt 
derived. The possession of a scent-organ in the abdominal fold of the hindwing of L. curius and of a tooth at 
each of the tarsal claws in the same species, as well as the powerfully built body, the markings of body and 
wings, the scaled greenish legs, etc., recall Kite-Swallowtails. We consider it quite a mistake to separate 
Leptocircus from the Papilionmae as a distinct subfamily. 
