Annals of the Transvaal Museum 
259 
Genus ARTHRORHABDUS Pocock. 
Arthrorhabdus formosus Pocock. (Fig. 24.) 
Habitat : Port Elizabeth, Namaqualand, Willowmore, Steytlerville, Middel- 
burg (C. Prov.); Victoria West; Steinkopf (S.W. Protectorate); Cradock 
(G. P. F. van Dam). 
Fig. 24. Anal somite, pleurae and anal legs (ventral). 
A rthrorhabdus formosus Pocock. 
This species is very common in the dry Karroo districts of the Cape Colony. 
Its distribution beyond the Orange River into the Orange Free State and the 
Transvaal is very sparse. It is also found in Natal. Only two species are 
known : 
A . pygmaeus Poc. in North America. 
A . formosus Poc. in South Africa. 
Genus COLOBOPLEURUS Kraepelin. 
Colobopleurus devylderi Porath. (Figs. 25, 27.) 
Habitat : Namaqualand; Kimberley; Groenkloof; Rustenburg (Tvl.) 
(G. P. F. van Dam); Gezina, Pretoria (D. A. Stuart). 
Colobopleurus parcespinatus Porath. (Figs. 26, 28.) 
Habitat : Port Elizabeth. (In Albany Museum, Grahamstown.) 
