A Survey of the Scorpion Fauna of South Africa. 
129 
Family SCORPIONIDAE. 
Sub-family SCORPIONINAE. 
aen. OPISTHOPHTHALMUS C. L. Koch. 
1. O. OPiNATUS Simon, Ann. Soc. Eut. France, 6, v, 7, p. 382, 1887. 
Distribution : Kraepelin records it from Windhuk and Eehoboth and 
from G-ibeon in Great Namaland (12) ; he suggests that the type came from 
Mossamedes, but no definite locality is given in the original description. 
The specimens from Narudas Siid and from Quibis, referred to by me (22) 
under this name, are now the types of the following new species. 
2. 0. SCABEIFRONS Sp. UOV. 
This species agrees closely with ojmiatus Sim. in the following characters : 
Position of median eyes, armature of tarsi and protarsi, carapace groove not 
distinctly forked, fourth caudal segment vnth weakly developed inferomedian 
keels, vesicle with 3 granular tracts inferiorly, which, however, do not reach 
so far as the base of the aculeus in the larger specimen from Narudas Siid. 
It differs from opinatus Sim. in the following characters : Scape of 
pectines toothed throughout its length, the teeth varying from 21 to 23 
in the male. Carapace granulated throughout, coarsely so in its anterior 
half ; tergites without smooth areas, but closely covered with very fine dust- 
like granules. Other characters are : superior crests of caudal segments II-IV 
with subspiniform terminal teeth ; in the smaller example the fourth tarsus 
carries 6 spines externally (including those on the external lobe), but in the 
larger example only 5 ; chelicerae with several stridulatory lamellae ; upper 
surface of hand covered with numerous, moderately coarse, isolated granules, 
the finger keel entirely granular or more or less continuous distally, the 
other keels also represented, though indistinctly ; breadth of hand greater 
than the length of the hand-back. 
Measurements. — Total length 62, length of carapace 9, of tail 32, of 
humerus 6-1, of brachium 6-3, of hand-back 5-8, of movable finger 77, 
breadth of hand 6*9. 
The types are two adult male examples in the collection of the Transvaal 
Museum, taken by Mr. P. A. Methuen at Narudas Siid and Quibis, near the 
G-reat Karas Mountains in Great Namaland. The female is unknown, but 
is without doubt distinct from the form described as opinatus, for which 
Simon erected a new genus, Mossamedes, and which is expressly stated to 
have the scape of the pectines free of teeth in the basal fourth of its 
length. 
