36 
PIDORUS; GHALCOSIA. By Dr. K. Jordan. 
tnmcatus. 
oma bill's. 
bicoloratus. 
tricoloratus. 
splendens. 
hilaris. 
miles. 
adalifa. 
fuliginosa. 
cyanivena. 
Candida. 
from the costal margin to the hinder angle, broader than in gemma, corculum, etc. 3. subcostal of the fore¬ 
wing proximal to the 5. — Sarawak; 1 cf in the Oxford Museum. 
P. truncatus spec. nov. (6g). Black-brown, the occiput red all round, breast and sides of the abdomen 
somewhat metallic green-blue; a large lateral spot on the mesosternum and the underside of the abdomen 
pale yellow, fore wing black-brown, the veins paler, distal margin almost straight, a straight pale yellow 
band from the costal margin to the hinder angle, its distal margin crossing the tip of the cell; the 3. sub¬ 
costal far proximal to the 5. Contour of the hindwing as in P. circe. — Sikkim, April; 3 cfcf and 2 ?? in 
the Tring Museum. 
P. (?) amabilis spec. nov. (6f). Agrees neither altogether with Pidorus nor with Eterusia. Frons 
broader than long, the 3. subcostal of the forewing much more proximal than the 5., the 2. and 3. radials 
short stalked. Body yellow, head before and behind the antennae, middle-of the collar and patagia, the 
larger part of the meso- and metathorax, and the extreme bases of the dorsal segments of the abdomen, 
as well as the antennae, green-black. Wings bright yellow, extreme base of the forewing, three small 
spots near it., somewhat less than the distal half of the wing and the apex of the hindwing purple-black. 
Beneath there are grey-yellow spots in the brown-black distal parts. — Mauson Mountains, Tonkin, at a 
height of 2—3000 ft., April to May; in the Tring Museum. 
P. bicoloratus Semp. Body black, wings yellow, with broad black marginal band, which has 
3 silver spots on the forewing above and on both wings below. — Mindanao. 
P. tricoloratus Semp. Body black, abdomen beneath ringed with yellow, frons and collar likewise 
yellow. Wings yellow, forewing edged with black, black at the base, then yellow beyond the middle, 
distally yellow-brown; hindwing yellow, with broad black distal margin. — Panaon, Philippines. This and 
the preceding species are not known to me in nature. 
P. splendens spec. nov. (6g). ?: antenna blue; occiput red; abdomen above green-blue; body 
beneath green. Upperside of the thorax and forewing dark olive-green; forewing behind the middle with 
a yellow band, which is suffused with blue on the veins and which viewed at a very acute angle assumes 
a very pale reddish tone; the band accompanied by white spots proximally and distally. Hindwing from 
the base to the anal angle and to 2 /s the length of the cell glossy blue; a broad yellow band placed before 
the distal margin. Both wings beneath blue proximally, green at the base; band of the forewing broader 
than above, a blue submarginal macular band. — Kina Balu, North Borneo; I ? in the Tring Museum. 
P. hilaris spec. nov. (7 a). $: similar to splendens, and perhaps only an individual form of this. 
Band of the forewing narrower, the distal margin of the wing somewhat more oblicjue; hindwing less broad, 
without yellow band, but with an indistinct yellow spot at the apex of the cell. — Kina Balu, North Borneo; 
1 ? in the Tring Museum. 
P. miles Btlr. (7 a). Black-brown. Forewing with a yellow stripe behind the costa, which runs from 
the base to beyond the middle and then curves round towards the anal angle, a yellow dot at the apex of 
the wing; pronotum and patagia likewise yellow. Hindwing with broad red costal stripe. Sikkim; Bhutan. 
38. Genus: {Jhalcosia Hbn. 
Frons projecting, usually as broad as long, above not narrowed, or but little, between the antennae. 
The 1. and 2. subcostals of the forewing free, the 3.-5. stalked together, the 5. branching off proximally; 
upper angle of the cell of both wings projecting beyond the lower, the latter pointed in the forewing, the 
2. and 3. radials of the forewing stalked, rarely from the cell. The hindmargin of the head and the pronotum 
usually red, rarely yellow. The dark parts of the wings more or less metallic. Dorsal part of the 8. abdominal 
segment of the cf extending beyond the lateral part. 
Some of the species are very variable and most are very common. The genus is distributed east¬ 
wards to Flores and extends northwards to Japan. On Celebes and the Philippines no true Chcdcosia has 
yet been found. 
C. adalifa. Vertex blue, cf occurring in two forms, a light one, similar to the ?, and a dark one. 
Wings in cf and ? white, with black vein-streaks, or in the cf black, with white markings, or intermediate 
between these extremes; hindwing usually with yellow hindmarginal area. The 8. abdominal segment of the cf 
(the last external one) truncate, usually with a small obtuse lobe in the middle, not emarginate. — adalifa 
Doubl. (= virginalis H.-Scli., subcyanescens Walk., eardinalis Moore) (7 a) inhabits Sikkim, Assam, Burma and 
Tonkin. The ? has a narrow, irregular brown-black band, which extends from the upper angle of the cell 
of the forewing to the 1. submedian of the hindwing and is sometimes only indicated. The cf varies from 
being almost entirely white to almost entirely black. Dark specimens with little blue on the veins are ah. 
fuliginosa Walk. (7); in ah. cyanivena Hamps. on the contrary the veins of the hindwing above and of both 
wings beneath are strongly striped with blue. — On Sumatra and Java is found Candida Yoll. (— forbesi 
