Publ. 4. V. 1920. 
IRTDANA. By Dr. C. Aurivilliits. 
345 
costal margin. Legs stout; the posterior tibiae and posterior tarsi compressed. Margin of the forewing between 
the apex and vein 4 straight, at vein 4 angled and behind it feebly emarginated; costal margin uniformly faintly 
curved. Hindwing at the middle of the distal margin obtusely angled and thereby somewhat square; the costal 
margin behind the middle deeply emarginated. Forewing with 12 veins: 2 and 3 posteriorly distinctly curved, 
5 almost in the middle between 4 and 6, 6 from the apex of the cell, 7, 8 and 9 on a joint footstalk. Hindwing 
with 8 veins: 3 and 4 from the posterior, 6 and 7 from the anterior corner of the cell, 5 from the middle of 
the transverse vein. 
T. isabellae Dudg. (J$(c). Forewing blackish-brown, above with an orange-yellow spot of the posterior 
margin, 6 to 7 mm broad, reaching vein 4 and being continued by three small, orange-yellow discal spots of 
the areas 4 to 6, beneath with dull yellowish traces of the markings of the upper surface, and at the margin 
spotted grey and brown. Hindwing above light orange-yellow with a blackish-brown marginal band of only 
2 mm width; beneath blackish-brown, at the proximal margin and at the margin in 1 c to 3 grey and decorated 
with silvery or lead-coloured streaks and spots; a broad transverse line runs from the apex to the middle 
of vein 1 b and is there split; a silvery spot at the costal margin near the base and two white spots in the discal 
cell. Sierra Leone. 
20. Genus: Iriclaiia nom. nov. 
This genus was at first described as Iris by Staudinger in 1891, then it was denominated Iridopsis 
by myself in 1898. But as both these names had already been used before in zoology, I have been obliged to rebap¬ 
tise the genus once more. 
In the structure of the veins, Iridana closely approaches the genus Teratoneura, but it deviates parti¬ 
cularly by vein 8 (or as we may take it vein 7) being absent and. vein 7 being bent semicircularly before its end. 
The veins 2 and 3 on the forewing are feebly bent, and the veins 3 and 4 emerge from the same place or 
they are petioled. Costal margin of the forewing slightly bent or almost straight. 
In all the species the wings above are more or less extensively coloured bright blue; the blue colour is 
more expanded in the <$ and covers at least the greatest part of the discal cell on the forewing. Margin of the 
forewing in the straight and more upright, in the $ more oblique and bent. The species are closely allied 
and as yet very insufficiently known; thus the differences are vague and we must regard the following review 
to be merely provisional. 
Review of the Species. 
A. Wings beneath without a metallic submarginal line. Forewing beneath with a triangular, light spot in the 
discal cell at the costal margin. I. incredibilis. 
B. At least the hindwing beneath before the margin with a lustrous green or bluish line. Forewing beneath 
without a light spot in the discal cell. 
a. Wings beneath only with two small, whitish-grey discal spots in 4 and 5. I. perdita. 
I. exquisita. 
(3. Forewing beneath behind the cell-apex with a whitish-grey discal band formed of 4 spots in 3 to 6, the 
spots in 4 and 5 being long and large. 1. euprepes. 
I. incredibilis Stgr. (§ = ansorgei Smith) (65 c). In the £ the greenish-blue, strongly reflecting colour 
of the forewing above covers the areas 1 a, 1 b and the discal cell, the greatest part of the areas 2 and 3 and 
about half of the areas 4 and 5, as well as the whole hindwing except the costal, proximal and distal 
margins which are black in 1 to 2 mm width. In the $ the forewing is above black and only in the basal 
part of the areas 1 b to 3 broadly blue; on the hindwing the margins are 3 mm broad black. The under 
surface of the forewing is dull black with three light, Isabel-coloured spots in the discal cell, behind the latter 
and in the anal angle, with a grey costal margin and a light apical part intensely speckled brown, semicircularly 
bordered with greenish quite at the apex; posteriorly the narrow greenish semicircle is continued as a narrow, 
violet distal-marginal stripe. Very peculiar is the under surface of the hindwing showing a light brownish-grey 
ground-colour very densely speckled with dark, in the distal part with dark brown; through the middle runs 
a rather broad, grey transverse band with a dull silvery lustre in a certain light, more or less bordered with 
black at its margins and showing in the the middle a reniform macula surrounded by black; all these black 
margins are more or less bordered with a brownish red; immediately in front of the margin there is a very narrow, 
linear transverse band with a dull silvery grey lustre, proximally bordered with black, outside before the silvery 
grey fringes very finely with red-brown. Sierra Leone. 
isabellae. 
incredibilis. 
XIII 
44 
