298 
SOUTH-AFKICAN BUTTERFLIES. 
hlach sj)ots. Fore-iving : white spots as on upper side, and edged with 
fuscous; inner-marginal area pale fuscous ; hind-marginal border creamy, 
faintly tinged with fulvous, becoming macular towards posterior angle ; 
along hind-marginal edge a row of small inter-nervular black spots, j 
Hind-iving : a thin costal edging near base, discoidal cell, and a small 
space beyond, and a widish hind-marginal border, very pale fulvous ; ! 
near base two small black spots above discoidal cell, two in cell (with 
a small space of the ground-colour between them), and one below cell ; 
two parallel discal rows of small black spots (seven in each row), parallel 
at a little distance apart ; inner-marginal fold tinged with fuscous at 
its broad anal-angular extremity ; hind-margin thinly edged with 
fuscous, interrupted (like the fulvous border) by nervules of the ground- 
colour. 
^ Fore-iuing : white sjjots inclining to creamy, all smaller than in $ 
{especially the seventh, while the eighth is wanting or exceedingly minute)] 
hind-marginal spots distinct, pale fidvous-ochreous, seven in number. 
Hind-wing : disco-celhdar spot large, pale fidvous-oclireous ; close to hind- 
margin a row of seven spots of the same colour, not extending below 
submedian nervure. Cilia creamy white, with wider fuscous interrup- 
tions, of which in hind-iving there are only three, at the extremities 
of median nervules. Under side. — As in $, hid the fulvous markings 
much hrighter. Hind-wing : two additional fulvoas marks immediately 
before inner discal row of black spots, viz., one between costal and 
subcostal, the other between median and submedian nervures. 
This Pyrgiis closely resembles both P. Mohomtza (Wallengr.) and 
P. Chaca, Trim. ; in size it is nearer to the former, but in pattern 
to the latter. The continuous character of the discal row of white 
spots, due to the constant presence of two spots between the costal three 
and those below median nervure, distinguishes it in both sexes from 
Mohozutza. The $ is further separable by the purer white of the 
discal spots and the cilia, and by the obsolete condition of the hind- 
marginal ochreous spots, which in Mohozutza are well marked. On 
the under side both sexes present in the hind-wing a regular inner 
discal row of seven black spots instead of the three or four widely- 
separated and irregularly-placed spots in Mohozidza ; paler (and on 
costa and submedian nervure much reduced) fulvous markings, and a 
whitish instead of fuscous inner-marginal fold. Apart from its very 
much smaller size, Tucusa in both sexes is very like Chaca on 
the upper side, but on the under side it wholly wants in the hind- 
wings the broad transverse median fulvous band and fulvous base, 
separated by a creamy-white black-edged band, so conspicuous in 
Chaca. 
An aberrant $ sent from the Transvaal in 1873 by Mr. H. Barber has the 
fore-wings longer than usual, with the discal spots all smaller and tinged with 
yellow-ochreous, but three ^ s accompanying that specimen are normal. 
