248 
Annals of the Transvaal Museum 
The description of this species is largely taken from Kraepelin, loc. cit. The 
specimens are from : Hectorspruit (Tvl.) ; Newington, near Komatipoort (Tvl.) ; 
Natal (Miss H. Becker) ; and Selati. 
The genus is only represented by the single species in South Africa. It is 
very uncommon, and seems to be confined to the north-eastern regions of 
South Africa. 
The following species (Kraepelin, loc. cit.) should be noted: 
A . appendiculatus Poc. : Nyasaland, Zambesi. 
A. calcipes Cook: South-West Africa (Quango, Angola). 
A. multicostis Imh. : West Africa (Cameroon, Mundave, Sierra Leone, and 
Gold Coast, Elephantensu) . 
A . grandidievi Luc. : East Africa (Zanzibar and East Afr. Protectorate (for- 
merly German East Africa)). 
Genus ETHMOSTIGMUS Pocock. 
(See figs. 3 and 4.) 
Key to Ethmostigmus trigonopodus Leach. 
Sternocoxal plate (maxillary sternite) provided with four equal, or nearly 
equal, stout teeth. Penultimate walking leg generally provided with a tarsal 
spur. 
Fig. 3. Maxillary sternite (or sternocoxal plate) and prosternal dentiferous 
plates of Ethmostigmus trigonopodus Leach. 
Fig. 4. Pleura and armature of Ethmostigmus trigonopodus Leach. 
Femur of anal legs ventral exterior with 3 (2), ventral interior with 2 (3) 
spines, dorsal with 2, 2 spines and terminal spine. 
The bifid termination of the pleurae have the shape of two short stout 
needles ; pleurae armed dorsally with 2-3 spines, laterally with 1-2 spines, the 
anal sternite does not extend up to the pleurae. 
Habitat : “ Durch ganz Afrika von Algier und Abyssinien bis zum Kaplande, 
am haufigsten aber im tropischen Afrika, sowohl an der West- wie an der 
Ost-Kuste” (Kraepelin, loc. cit.). 
The museum specimens were from: Leydsdorp (Tvl.) ; Hectorspruit (Tvl.) ; 
Malelane (Tvl.); Vygeboompoort, Waterberg (Tvl.) (G. van Dam); Victoria 
Falls; Shoholle, near Gravelotte Railway Station (G. P. F. van Dam). 
Genus RHYSIDA Wood. 
Key to the South African species. 
1 . Tergites without median sulci, at most a pair of short median lines is 
present on the posterior margin. Sternites with a pair of faint, abbre- 
viated sulci, and often two shallow impressions. Anal tergite margin- 
