Transactions of the Royal Society of South Africa. 
(4) Tarsus IV with 5.4 or 4.4 or 5.5 spines inferiorly, including 
that at the angle, and between these spinous rows a distinct 
median row of spicules . . . . . . .5. 
Tarsus IV with either a spine or a bristle at the distal angle 
inferiorly and in addition either 3.2 or rarely 3.3 or 2.2 spines 
on the lower surface, and the median row of spicules between 
the spinous rows either quite absent or weak . . .6. 
(5) Hands with fairly coarse sculpturation on the inner half of 
the upper surface, only a narrow area in the middle of that 
surface being comparatively smooth ; vesicle small, with a 
strongly developed infero-median paired row of granules, and 
in addition 2 weakly-developed inferolateral rows . . O. asiaticus Keys. 
Hands almost quite smooth above and over the greater por- 
tion of the upper surface ; vesicle only with a weakly-developed 
infero-median paired row of granules . . . . O. aequispinus Kraep. 
(6) Tarsus IV Avith a pair of long weak bristles at the distal 
angles inferiorly, with no trace of a median series of spicules 
between the spinous rows, but with a distinct row of spicules 
basally on the inner (posterior) side ; vesicle without granular 
rows inferiorly in the adult ; hands coarsely sculptured above, 
without any indication of a keel arising from the base of the 
immovable finger to form the inner boundary of the upper 
surface of the hand ....... 0. validus typicus Thor. 
Tarsus IV with a pair of spines (or one of them may be 
replaced by a bristle) at the distal angles inferiorly, but with 
no trace of a median series of spicules betAveen the spinous 
rows ; sides of fifth caudal segment granulated, coarsely so in 
males ; vesicle inferiorly with obsolete or rather weak granula- 
tions on the inferomedian rows, and with no indication of 
inferolateral rows ; hand sculptured above but not coarsely 
so, and there is no distinct keel forming the inner boundary 
of the upper surface . . . . . .0. validus albanicus var. nov. 
Tarsus IV with a pair of spines at the distal angles inferiorly ; 
hand very flat above and somewhat sculptured, a more or less 
distinct keel arising from the base of the immovable finger to 
form the inner boundary of the upper surface ; vesicle deep and 
swollen, especially in males, with well-developed granular 
rows inferiorly ; sides of fifth caudal segment granulated 
throughout, or at any rate superiorly. Legs yellow , 0. validus fidvipes Poc. 
Similar to fulvipes, but tarsus IV may have either spines or 
strong bristles at the distal angles inferiorly, and sides of 
fifth caudal segment are not granulated. Legs dark. 
0. validus transvaalicus Kraep. 
Similar to Jnlvipes but hand smooth above and not fiattened ; 
vesicle without granular rows inferiorly even in the male. 
Legs yellow ........ O. validus var. nov. laevis. 
Hand like that of validtis typicus, vesicle with well-developed 
granular rows inferiorly, tarsus IV with spines at the distal 
angles inferiorly ...... O. validus var. nov. sioazianus. 
