Annals op the Transvaal Museum, 
49 
1 of the whole of vein 9 ; 10 from before | of stalk 8-9 ; 11 parallel to 
stalk and vein 10 and originating just opposite vein 2 from upper median ; 
12 parallel to costa for a long distance. 
Hind wing large, wider from costa to tornus than from base to termen ; 
costa and outer margin from 16 to 6 much rounded ; inner margin straight ; 
apex and tornus rounded ; la very long, somewhat curved ; 16 straight ; 
2 from f lower median ; 5 and 4 irom lower angle ; 5 from a little above 
the angle ; discoceliuiar faint, rounded ; cell less than \ of wing ; 6 and 7 
on a short stalk and from upper angle ; 8 curved towards upper median 
at bend, touching it and then nearly straight towards apex ; upper median 
bent at 
As Prof. Aurivillius pointed out ( l.c . p. 65), the type species ( discalis ) 
of the genus Aroa does not fit in with Walker’s Aroa at all, as Walker 
states tLat the palpi are short, third joint very small, and that the $ has 
the abdomen woolly at the end ; this is certainly not so in discalis. He 
also states that veins 3, 4, and 5 ot hind wing are at equal distance and 
that 2 is 2 times further from 3 than 3 is Irom 4. This is not so in 
0. discalis and also not in the genus Euproctis , to which genus the 
description applies mostly, and ot which Aroa is a synonym. Moreover, 
all other species placed by Walker in Aroa are clearly members of the 
genus Euproctis, except adspersa, which Walker queries himself. 
The genus Aroa, described by Sir Hampson in “ Moths of India,” 
Yol. I, p. 433, does certainly not lit discalis, nor does fig. 304, as discalis 
has no areole, 6 is from far below 7, 3 is nearer to 4, and 16 is simple at 
base in the fore wing ; 3 and 4 are not apart and 8 has no bar to upper 
median in the hind wing. Besides he gives Bazisa as a synonym of Aroa, 
a genus quite distinct, as seen in this paper and as admitted by Hampson 
in his “ South African Moths ” (1905). He also places Aroa near the 
genus Orgyia, but discalis is certainly not related to this genus. Swinhoe 
places species of most different genera in Aroa, e.g. all species of Lacipa. 
I therefore think that Waliengren’s name has to be used, as there 
is no doubt that his hypoxantha is the same as Walker’s discalis. 
Species in South Africa : — 
1. a. Hind wing black or fuscous-black (XL VI) 2. 
6. Hind wing deep chrome with broad streaks of fus- 
cous-black 3. 
2. a. Fore wing with the ground colour black melanoleuca. 
6. Fore wing with the ground colour mahogany red (II) quadrimaculata. 
3. a. Fore wing with an oblique deep chrome band in A \ 
m $ with a nearly oblique postmedial line discalis. 
6. Fore wing without any deep chrome in A \ ? with 
postmedian line much angled difficilis. 
Ornithopsyche discalis, Wlk., Cat. IY, p. 792 (1855). 
Ornithopsyche ochracmta, Wlk., XXXII, p. 327 (1865). 
Hmpsn., Ann. S.A. Mus., p. 409 (1905). 
Ornithopsyche signata, Wlk., XXXII, p. 328 (1865). 
Ornithopsyche hypoxantha, Wllsrn., K. Yet. Akad. Handl. (2) Y (4), 
pT 35 (1865). 
Feld, Reis. Nov. (pi. 100, fig. 4). 
4 
