Transactions of the Royal Society of South Africa. 
(j) Mesial portion of last tergite covered witli a fine close 
shagreen, and that of caudal segments I and II also very 
dense and moderately fine ; upper surface of first caudal 
segment very fiat, its anterior edge projecting slightly for- 
Avards in the middle, the surface descending very suddenly 
and quite perpendicularly along this edge. Caudal seg- 
ment lY with 10 well developed granular keels. Hand 
slender in both male and female, not exceeding the brachium 
in width. Ocular tubercle granular above except on the 
superciliary ridges ; interocular area granular . . P. jJlanicauda Foe. 
(k) Shagreen on last tergite and on caudal segments I and II 
not so dense as in planicauda, but composed of coarser 
granules and ridges ; upper surface of caudal segment I 
excavated, obtusely inclined to the anterior descending 
portion. Middle lateral keel of caudal segment IV weak, 
but granular and distinct throughout. Ocular tubercle 
smooth above ; interocular area granular . . P. kraepelini Wern. 
(l) Middle lateral keel of caudal segment IV rudimentary; 
shagreen on last tergite and on the first caudal segment 
very dense and fine ; the shagreened area of I almost flat 
or very slightly concave, the upper surface descending 
suddenly, but not quite so perpendicularly as in planicauda. 
Ocular tubercle smooth above ; interocular area smooth in 
the female. Hand and brachium comparatively stout. Tail 
comparatively long and slender ; caudal segment IV 
slightly narrower than I ...... P. laevifrons Sim. 
[Both sexes of P. I. var. a^istralis, but female only of P. I. 
var. militiim.^ 
ft Stridulatonj area of second caudal segment confined to a 
rather narrow channel, and com^josed largely of trans- 
verse ridges, some of which, posteriorly at least, extend 
across the area, (m— p.) 
{m) Caudal segment I moderately excavated above, the stridu- 
latory area composed largely of ridges which are not quite 
as strong as those of II, in the broad region anteriorly 
being limited to the mesial portion and reduced in size to 
broadened granules. Shagreen on last tergite compara- 
tively coarse. Inferomedian keels of caudal segment I 
crenvilated ; superior keel of V strong in its anterior half, 
Avhere it includes about 8 coarse granules. Ocular tubercle 
granular except on the superciliary ridges ... P. jiavidus Poc. 
(n) Caudal segment I with a long rather narrow groove supe- 
riorly, the ridges well developed even anteriorly, though 
not quite so strong as in II. In the posterior half of the 
last tergite mesially there is also a ridged stridulatory area, 
some of the ridges being almost continuous across the width 
of the area. Ocular tubercle granular above, except on the 
superciliary ridges ....... P. triradulatns Hewitt. 
(o) Caudal segment I with the stridulatory area occupying a 
shallow concavity, the transverse ridges being very fine. 
