250 
Annals of the Transvaal Museum 
ate. Posterior boundary line of the prosternal dentiferous plates 
meet in an obtuse angle. Anal sternite abbreviated, posteriorly 
angularly or curved emarginate. Femur of anal legs armed ventrally 
with a few spines. Pleurae with bifid extremity; exterior margin or 
porous area deeply emarginate. Nineteenth pair of legs with one 
tarsal spur, twentieth without. First stigmata (when closed) C/V 
shaped (see fig. 12); second often J!) -shaped .... 2 
2 . Pleurae provided laterally with a spine, and strong bifid termination. 
Femur of anal legs armed with an aggregate ventrally and internally 
with 3-4 spines (see fig. 11) . . . . . R. afra Peters 
Pleurae without lateral spine, weak bifid termination. Femur of anal 
legs unarmed or at most one or two small spines . R. peter si Porath 
1. Rhysida afra Peters. (Figs. 5, 6.) 
Habitat ; Delagoa Bay; Haenertsburg, Waterberg (Tvl.); Alicedale (C. 
Prov.); Belfast (Natal); Sunnyside, Pretoria (B. Penfold, Esq.); Wakker- 
stroom (Tvl.) (M. Hazelhurst); Rustenburg (Tvl.) (J. H. van Dam); Sjambock- 
stad, Pretoria (F. C. Zwarts); Avontuur (C. Prov.) (J. H. Rex); Vygeboom- 
poort (Tvl.) (G. van Dam); Roodepoort Dist., Pretoria (G. P. F. van Dam); 
Nylstroom, Waterberg (G. P. F. van Dam). 
7 
Fig. 7. Sternocoxal plate (maxillary sternite) and maxillipedes of 
Rhysida afra Peters. 
2. Rhysida peter si Porath. 
Habitat : Port Elizabeth and neighbourhood; Giant’s Castle, Tabamlope, 
(Natal) ; Haenertsburg, Zoutpansb. distr. (Mr Swierstra) ; Wakkerstroom (Tvl.) 
(Mr A. Roberts); Grahamstown (C. Prov.) (G. P. F. van Dam). 
The two species R. afra and R. peter si are usually if not invariably found 
in the same locality, and they are in most characters so alike that they appear 
to be one and the same species. It is, however, advisable to adhere to the two 
