130 
Transactions of the Royal Society of Soiith Africa. 
This species is closely related to 0. carinatus Ptrs. ; the sharply cut 
median notch on the anterior margin of the carapace is very similar in the 
two species. The section of Opisthophthalmus which includes carinatus, 
opinatiis, and scahrifrons seems to me to be the most primitive group of 
the whole genus. 
3. 0. wAHLBERGi Thorell (PI. XXII, fig. 38), Ann. Mag. Nat. Hist. 4, xvii, 
p. 13, 1876. 
Distribution : Little and G-reat Bushmanland northwards to Damaraland ; 
known to me from Kyky and Lower Molopo in the Western Kalahari, from 
l^^orth-West Gordonia, and from Mount Temple, Bechuanaland. Dr. 
Purcell (17) distinguishes three races according to the colour of the vesicle ; 
these are not sharply separable in some localities. 
4. O. scHULTZEi Kraepelin, Denkschr. Med. Nat. Jena, xiii, p. 262, 1908. 
Distribution : The types were from Kubub in G-reat Namaland, and the 
Transvaal Museum has what appears to be this species from Aus. 
5. O. UNDULATUS Kraepelin, Denkschr. Med. Nat. Jena, xiii, p. 263, 1908. 
Distribution : Types from Kubub in Great Namaland. The Albany 
Museum has a dried male example, apparently referable to this species, 
which was found in a box of pinned insects unearthed at Aus by Private 
J. R. Honiball. The specimen does not agree entirely with Kraepelin' s 
description. The fourth caudal segment is not cross- wrinkled inferiorly, but, 
shows faint indications of inferomedian keels ; the third segment also, 
though granulated, is not transversely wrinkled. The fourth tarsus has 
no external spines inferiorly, but the third tarsus has 1 external spine. 
6. O. iNTERCEDENs Kraepelin, Denkschr. Med. Nat. Jena, xiii, p. 265, 1908. 
Distribution : The types were taken at Kubub in Great Namaland, 
7. O. ADusTus Kraepelin, Denkschr. Med. Nat. Jena, xiii, p. 260, 1908. 
Distribution: Types indefinitely located German South-West Africa. 
The species is omitted altogether from Kraepelin's more recent list (12). 
I am inclined to think that this is a synonym of Dr. Penther's species (26) 
0. hetscJiua7iicus, described from British Bechuanaland, but only known 
through a single female specimen. 
8. O. ECRisTATus Pocock, Auu. Mag. Nat. Hist. 7, 3, p. 411, 1899. 
This species is only known from the type specimen, which is stated to 
have been taken in the Transvaal. It seems to approach the genus Scorpio, 
and, according to Kraepelin, it is probably identical with 0. hoehmi Krpln., 
described from Lake Tanganyika: the Transvaal record should therefore be 
viewed with suspicion. 
