Pull. 27. X. 1934. 
IODIS. By L. B. Prout. 
125 
I. pallescens Hmps. (12 a) is a very distinct species on account of the sharp contrast between the green pallescens. 
and the white areas. Ceylon. 
I. subtractata Walk. (= opalaria Auctt., nec Guen.) (14 d). White, irrorated with green, the white lines subiradaia. 
not, or scarcely, indicated, their position shown by nai'row and ill-defined green bands which accompany them 
in the median area; terminal white dots minute, but distinct; cell-marks generally indicated in green. — ab. 
spumifera Warr. has the green irroration coarser, more confluent, particularly about the cell-spots. — The species spumx-fera. 
is distributed from N. India to Hainan, the Philippines, Borneo and Java; Walker's type came from Moulmein. 
I. iridescens Warr. (14 d). Still more iridescent, $ pectinations and $ palpus long, postmedian band iridescens. 
less sinuous, accompanied distally by a more conspicuous, crenulate white line. Forewing with 1st subcostal 
arising proximally to 1st radial (in subtractata distally). Only known from the Khasis. 
I. rhabdota Prout (14 e). Larger than iridescens, slightly broader-winged (more as an overgrown sub- rhabdota. 
tractata). Green bands broad, the postmedian white line nearly as in iridescens. Venation about as in that 
species, pectinations of $ antenna less long. Khasis (type) and Sikkim. 
I. coeruleata Warr. (14 e). Ground-colour much greener than in subtractata and iridescens , slightly coeruleata. 
greener than in rhabdota, which it resembles in size. The yellow-green bands narrower than in rhabdota, post- 
median at least as sinuous as in subtractata. Pectinations long, but slightly more lax than in iridescens. Fore¬ 
wing with 1st subcostal connate or from close before end of cell. Assam. 
I. colpostrophia Prout (14 d). Somewhat larger than coeruleata , a little rounder-winged, the tail of the colpo- 
hindwing short. Both the known examples are discoloured to yellowish, so that the colours cannot be compared, stroyhia. 
but it will possibly prove a race of coeruleata. The type $ is from S. Java, a from Selangor is evidently con- 
specific . 
I. rantaizanensis Wileman (14 e). unknown. Probably near coeruleata, but apparently of a greyer rantai- 
green, the postmedian line scarcely at all sinuous. $ palpus moderately long, but by no means extreme. 1st ~ anensis. 
subcostal of forewing just stalked, 1st radial stalked beyond it. Rantaizan, Formosa. 
I. xynia Prout (14 e) recalls iridescens in its shape and strong iridescence, but is greener, the white post- xynia. 
median more crenate, the pectinations not quite so long; 1st subcostal of forewing anastomosing with both 
the neighbouring veins, while in coerulescens it is free or (rarely) anastomoses with the costal only. The cell- 
marks (when distinct) are green, with a whitish spot on the posterior part of the 3rd discocellular. Khasis; 
a $ from Sikkim probably belongs with them. 
I. ctila Prout (14 e). Rather broad-winged for an lodis, the tail of the hindwing small. Near rantai- ctila. 
zanensis in coloration and markings, as well as in structure, though the 1st subcostal of the forewdng closely 
approaches or anastomoses with the costal. Postmedian line more proximally placed, especially on the hind¬ 
wing, where, moreover, it is less crenidate. Upper Burma. 
I. lara Prout (12 h). Somewhat smaller and more delicate-winged, forewing with 1st subcostal anasto- lara. 
mosing with 2nd as well as with costal; hindwing with slightly sharper apex; face clearer green. Laukhaung, 
Upper Burma, only the type <$ known. 
I. delicatula Warr. (14 e). Very easily distinguished from iridescens and xynia by the black cell-dots. deUcaiula. 
No green bands accompany the lines, which are almost as crenate as in xynia. Venation as in iridescens or 
rather — in that the 1st subcostal arises from the end of the cell — as in coeruleata. Terminal joint of palpus in 
$ very long. Khasis. 
I. argentilineata Wileman (14 e). Rather more greyish green, the dentate and sinuous postmedian lir.e 
strong, inclined to thicken behind 2nd median; cell-marks with white posterior spot. $ with 3rd joint of pal¬ 
pus long; pectinations moderate. Anastomoses of 1st subcostal variable. Formosa. 
argenti¬ 
lineata. 
I. argutaria Walk. (14 h). Except that the 3rd joint of the $ palpus is less long, it is difficult to find argutaria. 
definite characters whereby to distinguish this species decisively from argentilineata. The ground-colour seems 
more iridescent, the lunules of the postmedian line are more strongly developed or more sharply white, parti¬ 
cularly the one behind the 2nd radial and that behind the 2nd median, these lunules being larger than the rest, 
with the white broadened; moreover very distinct deep-green lines border the white markings in the median 
area. North India (loc. typ.) and China. Rare in Japan and Formosa. 
I. inumbrata Warr. (14 f) differs from argutaria in the olive-brownish cell-spots and in the broader and inumbrata. 
more olive-yellow shades which accompany the white lines. 3rd joint of $ palpus long. Khasis. 
I. sinuosaria Leech (Vol. 4, pi. 2 i). Probably a large pale form of argutaria ( 1 4 h), with the hindmost 
white postmedian spot enlarged, as in albipuncta (14 f). The two forms meet in W. China, but in most loca¬ 
lities we have only recorded argutaria. Leech’s type came from Pu-tsu-fang. 
XII 
sinuosaria. 
17 
