Publ. 5. XI. 1926. 
AROA. By Dr. M. He ring. 
153 
48. Genus: Aroil Wkr. (Ornithopsyche Wallgr.). 
Forewing without an accessory cell, vein 11 from the cell, 10 from the pedicle of 8 -f 9, rising distally 
to 7. In the hindwing 6 + 7 not forked, 3 + 4 forked or from the same place. Palpi long, projecting far beyond 
the frons. Hind tibiae with 2 pair of spurs. — Sometimes 6 + 7 are forked in the hindwing; but in that case 
in contrast with Euproctis, vein 6 of the forewing always rises far away from the pedicle of 7 to 10. A number 
of species ranged in this genus by Swinhoe will probably have been wrongly placed here. 
A. discalis Wkr. (+ = hypoxantha Wallgr.) (22 f). very variable, forewing varying from grey discalis. 
to dark red-brown, with an antemedian and postmedian transverse line, both being parallel and distally curved; 
between the latter and the margin there is a darker nebulous line, a black dot on the cross-vein. From the 
centre of the costal margin to the anal angle there is mostly a yellow area which may be extended towards 
the base. Hindwing yellow, apex and costal margin and mostly also the anal margin very broadly black. $. 
Forewing light yellow, the postmedian line not parallel to the antemedian line, oblique and almost straight. 
Margin with blackish-brown spots. Hindwing darker yellow. Cross-vein with a black spot, beneath as in the 
$ with a postdiscal dark line parallel to the margin. In the form ochraceata Wkr. the hindwing is partly powdered ochraceata. 
with red-brown; — signata Wkr . has a $, the forewing of which is pale brownish-grey, whereas the hindwing signaia. 
is without the discal spot. South and East Africa. 
A. anthora Fldr. (22 g). Forewing grey, the antemedian, postmedian, and terminal transverse lines anthora. 
as well as two maculae in the cell ochreous-yellow. Hindwing black with 3 orange-yellow longitudinal stripes. 
South Africa. — To this place probably belongs a $ in the Tring Museum from West Pondoland, which has but 
one macula in the discal area of the forewing; the yellow stripes of the hindwing are confluent forming a central 
area. 
A. difficilis Wkr. resembles discalis Wkr. (22 f), but in the without the deep yellow band in the forewing, difficilis. 
in the $ the postmedian line is very angular. South Africa. 
A. quadriplagata Pagenst. Quite similar to discalis (22 f), the light spot in the forewing of the broad, qua drip la- 
almost square, the stripe-like spot of the hindwing narrower, situate almost discally. Abyssinia. The $ probably gala. 
belonging to it resembles the signata-iovm of discalis, but it has a black abdomen with yellow rings (in discalis + 
the abdomen is yellow), and in the hindwing the yellow colour is almost as reduced as in the + 1 $ from 
Maraquo, Central Abyssinia in the Tring Museum. 
A. umbrata B.-Bcik. Body brown, abdomen dark brown. Forewing dark umber-brown, with a broad umbrata. 
light browm discal band, beyond the cell very much distally curved. On its outside a thin dark undulate transverse 
line, likewise distally curved. Hindwing dark soot-coloured grey. Expanse: 30 mm. N'Dalla-Tando, North 
Angola. 
A. tomisa Drc. Wings pale yellow, forewing at the margin shaded with brown, hindwing with some tomisa. 
brown spots at the apex and anal angle. Body chrome-yellow, antennae and legs black. Both wings beneath 
pale yellow without markings. Expanse: 62 mm. Dar-es-Salaam. 
A. incerta Roglifr. Wings diaphanous, pale ochreous, also the body. Anal wool of the $ whitish-yellow, incerta. 
Veins yellowish, cross-vein of forewing darkened. Expanse: 37 mm. Taveta. 
A. callima B.-Bak. Body whitish, forewing of a pure white, but in some places with a brownish-yellow callima. 
hue, particularly beyond the cell. A basal costal-marginal dot, beyond it a larger spot, are greyish-brown; 
another small costal-marginal dot near the centre, a darker one at about % of the costal margin. Traces of 
a fine, very irregular white subterminal line distally projecting between the veins 3 and 4. Above this projection 
the margin shows 3 snow-white dots. Apex with a small black dot, behind it an indistinct white one. Hindwing 
white, between the veins 2 and 6 with a yellow tinge. Expanse: 36 mm. Lagos. 
A. perfida B.-Bak. Body brownish. Abdomen grey. Forewing pale brownish with a darker median perfida. 
area and a dark marginal spot above the anal angle. Hindwing white, fringe grey. Expanse: 26 mm. Gunnal, 
West Africa. 
A. caton B.-Bak. Body brown; forewing dark brown, with a dark subbasal spot and another one catori. 
at the cell-end, traversed by paler lines. Post-median line fine and strongly undulate, situate in a broad whitish 
band, accompanied by a small dark spot at the costal margin and one in the fold. An antemarginal row of 
dots between the veins, another row proximad to it. Hindwing brownish-grey. Expanse: 26 mm. Lokoja. 
A. pinodes B.-Bak. Forewing dingy brown, basal and median areas dark brown. A postmedian dull pinodcs. 
tan-coloured costal-marginal spot, in which there is a fine dentate transverse line, continued almost to vein 4, 
a similar apical spot and a subterminal row of dots. Hindwing grey. Expanse: 25 mm. North Angola. 
A. obliqua B.-Bak. Forewing dark brown with a slanting pale brownish-yellow transverse stripe obliqua. 
from the costal margin a little before the apex to the centre of the hind-margin where it grows wider. Distally 
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