292 SOUTH-AFRICAX BUTTERFLIES. 



neniire ; immediately before cilia a partly obsolescent series of inter- 

 ner^'ular white dots. Hind- wing : usually a wliitish spot in discoidal 

 cell towards extremity ; a discal row of two or three (usually rather 

 indistinct) spots between second subcostal and first median nervules ; 

 two or three indistinct pre-ciliary whitish dots near apex. Under 

 SIDE. — Dark-broivn, with all the border's of hind-vnng and costa and apex 

 of fore-wing densely hut unequally irrorated with whitish ; hind-wing 

 with tivo very narrow transverse stripes sharply defined hy hlacJcish edges. 

 Fore-wing : base of cell irrorated with whitish ; costal dashes repre- 

 sented by more distinct small spots ; a good-sized quadrate white spot 

 on costa before middle ; a faint transverse whitish streak at extremity 

 of discoidal cell ; other spots larger and better defined than on upper 

 side ; ground-colour paler near inner margin. Hind-iving : base 

 whitish ; sub-basal stripe from costa to submedian nervure, angulated 

 and more slender inferiorly ; discal strij^e widely interrupted on first 

 subcostal nervule, irregularly dentate on its inner edge, more regularly 

 and acutely on its outer edge, attenuated inferiorly and ending on sub- 

 median nervure. 



$ Like ^, but all the white markings (except discal spots of hind- 

 wing) better developed and more sharply defined, especially transverse 

 stripes on under side of hind-wing, the edgings of which are quite 

 black. 



This is a very distinct species, differing from all its congeners in 

 its very small white spots, and (on the under side) in its dark ground- 

 colour and very narrow sharply-defined black-edged transverse stripes 

 of the hind-wings. 



Only ten specimens (three $ s) have come under my notice. The first was 

 taken near Murraysburg, about the centre of the Cape Colony, in 1864, by 

 Dr. J. J. Muskett ; three were captured by Mrs. Barber on the Fish River in 

 November 187 1. On the i8th and 20th August 1873 I met with three 

 examples in Little Namaqualand ; and Colonel Bowker took three at Uitenhage 

 on the 6th October 1879. 



I took all the few examples that I saw in XamaqualanJ ; they settled on 

 the ground in dry stony places, and were not easily taken. Mrs. Barber wrote 

 that it was very numerous at Fort Brown on a particular hillock covered with 

 Barleria shrubs, but that she did not notice it elsewhere in the vicinity. Colonel 

 Bowker found his Uitenhage specimens "at the foot of stony hills." 



Localities of Pyrgus Sandaster. 



I. South Africa. 



B. Cape Colony. 



a. Western Districts. — Oograbics, and between Ivomaggas and Spec- 



takel, Namaqualand District. 

 h. Eastern Districts. — Uitenhage (/. //. Buwlier). Murraysburg 



{J. J. MusTxett). Fort Brown, Fish River, Albany District 



{Mrs. Barber). 



