126 
PSEUDIODIS; BERTA. By L. B. Prout. 
albipuncta. 
irregularis. 
undularia. 
nanda. 
niveo- 
venata. 
albidentula. 
unifascia. 
annulifera. 
poppaea. 
acle. 
diacte. 
I. albipuncta Warr. (14 f). Greener than most of the preceding, recognizable by the conspicuous white 
posterior lunule of the forewing, etc. Palpus of $ with 3rd joint very long. Forewing with 1st subcostal arising 
before 1st radial and anastomosing with costal. Khasis and perhaps Sikkim. 
1. irregularis Warr. (14 f). The greyest and one of the largest of the Jodis species, not at all translucent 
or iridescent, but rather resembling a well-tailed Gelasma. In this and all the succeeding species the 1st sub¬ 
costal of the forewing is stalked beyond the 1st radial. N. India, the type from British Bhutan. 
I. undularia Hmps. (= caudularia Hmps ., nec Guen.) (14 f). This species was formerly nrisidentified 
as caudularia Guen. (see Diplodesma , p. 117). In shape and markings comparable to dentifascia Warr. or putata 
orientalis Wehrli of Japan; considerably smaller than the former and of a slightly more greyish green, decidedly 
greener than the latter, with the tail of the hindwing slightly sharper. Described from the Nilgiiis, but widely 
distributed in India and reaching Ceylon and Hainan. 
1. nanda Walk. (= micra Warr.) (14 f). Still smaller than most undularia , otherwise hard to distinguish; 
but as the $ palpus seems to be definitely shorter it must be regarded as a species. Hindwing perhaps a trifle 
squarer. Postmedian line (green proximally, white distally) extremely slender, on the forewing somewhat less 
outbent behind the middle than is usual in undularia. Ceylon, India, Malay Peninsula, Tonkin, Formosa, Banka 
I., Borneo, Celebes and Bali; Walker's type was from Ceylon. 
I. (?) niveovenata Oberth. (Suppl. 4, pi. 3 f), founded on a single $ from Siao-lou, Chinese Tibet, is quite 
doubtfully placed, but as Dr. Wehrli tells me the palpus is short, as well as slender and weak, it cannot per¬ 
manently remain here. Forewing with 1st subcostal connate, anastomosing shortly with costal and touching 
2nd subcostal, both wings with 1st and 3rd radials stalked with the neighbouring veins. Should be very easy 
to recognize by the white veins and absence of all other markings. 
99. Genus: Psendiotlls gen. nov. 
Differs from Iodis in that the terminal joint of the palpus is very short in the shortish in the $, 
hindtibia of £ without hair-pencil, 2nd subcostal of forewing stalked considerably beyond 5th. The discocel- 
lulars of both wings approximate to the shape which characterizes Berta-, forewing with 1st subcostal stalked 
well beyond 1st radial; hindwing with costal anastomosing with cell at a point near the base, 1st median closely 
approximated to 3rd radial ( albidentula) to shortly stalked (unifascia). Type of the genus: unifascia (Hmps., 
1891, as Thalera). This is the Sect. II of Iodis according to Wytsman’s “Genera Insectorum”, but deviates in 
too many characters to be allowed to remain there. 
P. albidentula Hmps. (14 f). Very different from the genotype in shape — apex of forewing less pro¬ 
duced, termen of hindwing scarcely at all bent at 3rd radial. Confined to Ceylon. 
Ps. unifascia Hmps. (14f), from the Nilgiris and Palnis, is easily distinguished from all Iodis by the 
structural characters, from the iridescens group by the lack of iridescence, from irregularis (which it somewhat 
resembles in shape) by its much smaller size and much greener colour; moreover the antemedian line is weak 
on the forewing and wanting on the hind. 
100. Genus: ISerta Walk. 
An offshoot of Iodis, agreeing therewith in nearly all characters, but with a special formation of the 
discocellulars; the 2nd is curved (and in the hindwing strongly oblique), so that the 2nd radial appears to form 
its continuation, and the 3rd discocellular arises after the 2nd has turned outward; thus there is a pronounced 
angle at the base of the 2nd radial. Generally, also, the hindwing is more or less angled at the 1st radial, as 
well as at the 3rd, and most of the species have much more white admixture on the wings than in Iodis. May 
be considered an exclusively Inclo-Australian genus, but see Vol. 16, p. 44. 
B. annulifera Warr. (14 g). Grey-green with white markings, almost as in Iodis, which it also simulates 
in shape; some additional white maculation outside the postmedian is the only superficial indication of its 
true generic position. Very widely distributed: Assam (loc.tvp.); Malaysia and again in New Guinea, the 
Louisiades and Bismarcks. Probably several races will prove separable, but the liability of the species to fade 
is very unfavourable to any definite judgment. 
B. poppaea Prout (14 g). May be a race of annulifera but is olive-green rather than grey, has the post¬ 
median, subterminal and terminal white marks considerably strengthened and presents a definite difference 
in the white cell-marks, which in annulifera tend to form a ring (though this is seldom complete), while in pop¬ 
paea they consist of two spots, one in front of the other. Hainan. 
B. acte Swinh. (12 i) is also Iodis-shaped, but much larger than the two preceding and recognizable 
at a glance by the large white (anterior postmedian) patch of the hindwing. — ab. diacte nov. is a very frequent 
