HESPERID/E. 
297 
tionally much smaller ochreous spots of the hind-marginal row in the 
fore-wings of both sexes and in the hind-wings of the ^. On the 
upper side of the hind-wings of the $ Chaca there are, however, an 
indistinct central spot, and traces of three hind-marginal spots not 
found in the $ Mohozutza. The under side in both sexes differs from 
that of Moliozutza 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 the Tsomo River, 
Kaffraria, in December, and notes it as occurring in " open grassy glades between 
forests upon high mountains, sitting on flowers with closed wings." Mrs. 
Barber, however, who met with the species near Bathurst in March 1870, 
writes that it frequented " long grass, in rather a low and damp locality, among 
trees." Mr. Schiffman's specimens were captured on one of the hills round 
Grahamstown, but I am not aware in what kind of station. 
The species appears to be rare and very local ; I have seen only two 
examples of each sex. 
Localities of Pyrgus Chaca. 
I. South Africa. 
B. Cape Colony. 
h. Eastern Districts. — Grahamstown ( — Scliiffmcm). Bathurst {Mrs. 
Barber). 
II. Other African Regions. 
A. South Tropical. 
a. Western Coast. — " Angola (Pogge).'^ — Dewitz. 
D. Kaffraria Proper. — Tsomo River (J. 11. Boicktr). 
337. (14.) Pyrgus Tucusa, Trimen. 
Pyrgus Tucusa^ Trim., Trans. Ent. Soc. Lond., 1883, p. 359. 
Exp. al., I in. 1—3 lin. 
$ Fuscous, with seini-transjmrcnt ivhite spots. Fore-wing : a dull 
yellowish-white scaling from base to before middle along costa, median 
nervure, and inner margin ; at extremity of discoidal cell two elongate 
spots, one above the other ; a discal continuous row of nine spots, 
strongly curved outwardly in its upper portion, but thence sharply 
deflected inwardly to submedian nervure a little beyond middle ; of 
this row the largest spot is the seventh (immediately below disco- 
cellular spots), and the smallest the eighth ; close to upper part of 
hind-margin a row of five almost obsolete dull fulvous-ochreous spots. 
Eind'Wing : median and submedian nervures clothed with dull yellow- 
ish-white scales and hairs ; at extremity of cell an ill-defined whitish 
spot. Cilia white, in fore-iuing with narrow fuscous nervular interrup- 
tions, in hind-wing with scarcely visible similar interruptions. Under 
SIDE. — Dull creamy white, varied loith very pale fulvous and ivith small 
