16 Mr. R. Trimen on African Butterflies. 
white stripe very sharply defined, unbroken, straight, and even 
almost from costa beyond middle to 2nd median nervule, whence it 
narrows to its junction with the inner-marginal greyish-white on 
submedian nervure not far from anal angle,—its external edge 
presenting slight dentations on nervules; submarginal series de- 
veloped into a continuous strongly-festooned white line, with the 
effect of a row of small contiguous incomplete ocelli. 
On the upperside there is but little to distinguish this 
Pyrgus from P. sataspes, but the small spots of the sub- 
marginal series are better defined, and in the hindwing 
the central whitish marking is broader. On the under- 
side, however, the differences are considerable, vid. :—(1) 
the almost uniform tint of the ground-colour and the 
absence of the reddish tinge on hindwing and at apex of 
forewing presented by P. sataspes; (2) in the forewing the 
complete and rather conspicuous sinuate submarginal series 
of small whitish spots; while in the hindwing (8) there 
is no sub-basal white bar or streak; (4) the median bar is 
of a much purer white, begins on edge of costa instead of 
on costal nervure, is not constricted in the middle but of 
nearly even width till towards its inferior extremity ; and 
(5) the submarginal series of spots—which is wanting in 
P. sataspes—is modified into the festooned hindmarginal 
border above described. 
From the allied P. zebra, a native of the Punjab, the 
form here described differs much in the same way as from 
P. sataspes; but in P. zebra on the underside of the hind- 
wing the median bar is considerably broader and less 
regular, and there is a white submarginal waved streak 
(much as in P. ferox, Waller.) instead of the regular 
festooned hindmarginal border. 
It is remarkable that the last-named character occurs 
in both wings and in a more pronounced form in the 
otherwise very different and much larger European con- 
gener, P. proto, Esp. 
I have seen only one example, taken by the Rev. H. 
Junod at Delagoa Bay, and sent to me for identification 
in June, 1897. 
PrATE I, 
[The explanation faces the PLATE. | 
