Butterjiies of Southern Africa. 119 
viires. Underside. — Hinclwing and costal and apical 
region of foreioing mingled creamy and falvous-oclireons, 
the fulvous predominating- in hinclwing. Forewing : white 
spots as above, but rather larger, and relieved by black 
edgings from the ochreous colouring round them ; a small 
black spot on costa close to base ; a row of 7 small black 
spots on hind margin from apex to anal angle, the lowest 
two suffused and enlarged, so as to join inner-marginal, 
blackish ground colour. Hindioing : between costal and 
sub-median nervures, two transverse white bands (one before, 
the other beyond middle) edged on both sides with macular 
black streaks ; a hind-marginal row of 6 small black spots ; 
space between sub-median nervure and inner-marginal edge 
blackish, irrorated interiorly with creamy-cchreous ; costa 
at base with a black curved mark, about and beyond middle 
bordered with grey. 
$ Not so dark as $ ; spotting similar, but all the gelloiv- 
ochreous spots larger and more distinct ; cilia creamy 
instead of white, more broadly varied with black. Under- 
side. — As in $ , but the fulvous brighter, especially in 
hindwing. 
This is a species so closely allied to P. Mohozutza, 
Wallgr., that in 1865, on receiving a single $ from Mr. 
J. H. Bowker, I inclined to the belief that it was only an 
unusually large example of that insect. But an inspec- 
tion of both sexes, kindly presented to me by Mrs. Barber 
and Mr. Schiffman in 1868, has convinced me of the dis- 
tinctness of P. Chaca. Apart from the very considerable 
difference in size (-P. Mahozutza not exceeding about 13 
lines), both sexes of P. Chaca may, as regards the mark- 
ings of the upperside, be recognized by the possession of 
two small additional white spots (the 4tli and 5th) in the 
transverse row beyond the middle of the forewings, and 
the duller and proportionally much smaller ochreous spots 
of the hind-marginal row in the forewings of both sexes and 
in the hindwings of the $ . On the upperside of the hind- 
wings of the $ Chaca there are, however, an indistinct 
central spot, and traces of 3 hind-marginal spots not found 
in the $ Mahozutza. The underside in both sexes differs 
from that of 3Iahozutza by being paler ; by having a row 
of distinct black spots, instead of a black streak, along the 
hind-marginal edge of the wings ; and by presenting a 
whitish transverse band before the middle in the hind- 
wings. 
Mr. Bowker took this butterfly in several localities near 
k2 
