Rhopalocera from Southern Africa. 435 
differences are as marked as in the male, but the former 
is also distinguished by the remarkable transparency of 
the fore wing. From A. Chilo, on the contrary, A. 
Barberi is in both sexes distinguishable by its stronger 
black markings (with the exception of the inner edge of 
the fuscous hind-marginal border of the fore wing in the 
male and of both wings in the female, which in A. Chilo 
is unbroken near apex of fore wing)), and in the female by 
‘the much less transparency of the fore wing. The under 
side markings and colouring of A. Barberi agree entirely 
with those of A. Acara, except that the former are 
smaller. 
I have named this butterfly after its discoverer, Mr. 
H. Barber, who captured the two males and the female 
here described in the Transvaal country during the year 
1873. Mr. Barber collected a number of species in that 
region, but did not note localities further than stating 
that all were taken to the North of Pretoria. 
To this species, I consider, should be referred two 
butterflies received at the South-African Museum, viz., 
a male taken on the Vaal River by Col. J. H. Bowker, 
and a female forwarded from some part of the Transvaal 
by Mr. D. Arnot. These examples are clearly referable 
to one and the same variation, both having the apical 
yellow-ochreous of fore wing more pronounced, while the 
interior fuscous edging of the hind marginal border is 
almost obsolete. In the male this last-named character 
extends in a less marked degree to the hind wing; while 
in the female the peculiar transparency is not noticeable, 
the wings being quite as opaque as in ordinary females 
of A. Acara. 
Acrea fenestrata, n. 8. 
Exp. al. 2 in. 2 lin. (male). 
$. Warm fulvous-ochreous, inclining to rufous, with 
narrow black borders and a few black spots. Fore 
wing :—Base very narrowly marked with black, which 
extends for a little distance along inner margin; costa 
very thinly black-edged from near base, but more widely 
near apex; hind margin narrowly black-edged through- 
out, and all the nervules near it clearly defined with 
black—those near apex for the greatest length, and the sub- 
median nervure least of all; basal area thinly irrorated 
with black ; in discoidal cell near extremity a moderate- 
sized reniform spot; at extremity an elongate and more 
