A Survey of tlie Scorpion Fauna of South Africa. 
105 
Distribution : From Bushmanlaud in the Cape Province northwards to 
Great Nam aland. See Purcell (17) and Kraepelin (12). 
Known to me from the Western Kalahari, north of Zwart Modder (Miss 
M. Wilman), and from Kakamas (Miss H. C. Olivier). 
Kraepelin records it from Luderitzbucht, the type locality for my 
P. striduluf<, and it seems possible that the two species may have been 
confused together owing to a resemblance between the females. 
In our Kakamas specimen the first six tergites show distinct indica- 
tions of lateral keels, though represented only by a single enlarged granule 
on each side near the posterior margin of the tergite. 
The nature of the granulation of the stridulatory areas is not clearly 
described in the several descriptions hitherto published. Simon's original 
description, said to be based on a male example, but suspected by Dr. 
Purcell to be a female, includes : Last tergite " in medio minute et crebre 
. . . granulosum " ; the tail superiorly is " laevis, sed in segmentis I et II 
in medio subtiliter rugosa." 
Kraepelin in " Das Tierreich " says : " Dorsalfliichen im 1 und 2 Cdsegm. 
niit muldenformiger, matter, im II Segm. etwas querrunzeliger Liingsarea." 
In Dr. Purceirs monograph of the genus we find : " Upper surface in 
anterior segments (of tail) . . . very finely and densely shagreened mesially. 
Segment II less flattened above (than in I), especially posteriorly ; the 
shagreened area moderately concave, especially anteriorly, constricted 
posteriorly, then widened again, longer and narrower than in I, occupying 
in its widest part only about one-third of the width of the upper surface." 
Two fairly distinct forms seem to be recognisable, viz. : 
1. P. laevifrons var. australis (nom. nov.), the variety described by 
Purcell, based on specimens taken south of the Orange Eiver. In this 
variety, which is unknown to me, the shagreen on the second caudal seg- 
ment of the adult male apparently does not take the form of broad trans- 
verse ridges, but resembles that of the female. 
2. P. laevifrons var. nov. militum (PI. XIX, fig. 5), a northern variety 
based on adult specimens from Aus, South-West Africa. This is, I suppose, 
the form regarded by Kraepelin as typical, yet, inasmuch as the place of origin 
of the type is unknown and its sex probably female — if adult male, it must 
undoubtedly represent a distinct form — we have no means of ascertaining 
with certainty what are the characters of the type male. The type of 
militum is a single dried specimen, an adult male, in the collection of the 
Albany Museum. It was found in a box of unlabelled insects and arachnids 
which had been buried at Aus, South-West Africa, prior to the evacuation of 
that station by the Germans, and was subsequently unearthed by Pte. J. E. 
Honiball, of C Company, 1st Eastern Rifles, who presented it to the 
Albany Museum. 
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