138 
Transactions of the Royal Society of South Africa. 
Dr. Purcell seems to think this species is a near ally of granifrons Poc. ; 
I believe it to be related to nitidiceps and glabrifrons. 
29. 0. NiTiDicEPs Pocock (PI. XXIII, fig. 44, and PI. XXVII, fig. 73), 
Ann. Mag. Nat. Hist. 6, 17, p. 243, 1896. 
have no doubt but that 0. hreviceps Poc, founded on a male described 
at the same time as the type female of nitidiceps, is co- specific therewith. 
There are no data regarding the locality of the type of hreviceps, but the 
description agrees exactly with specimens from Grahamstown and Alicedale. 
The type of nitidiceps came from Port Elizabeth, and an adult male from 
that locality, in the British Museum, agrees closely with the type of hrevi- 
ceps, but differs slightly in the shape of the hands and in the finger-keel ; 
the latter is practically continuous throughout its length in the type of 
hreviceps, but in the Port Elizabeth specimen is broken up in its basal half. 
Other points of difference are represented in the following statistics : Breadth 
of hand in hreviceps type 8 mm., in Port Elizabeth specimen 9 mm. ; length 
of hand in b.t. 2175, in P.E.s. 18; length of movable finger in b.t. 15, in 
P.E.s. 12 ; length of brachium in b.t. 10-4. in P.E.s. 9 ; pectinal teeth in 
b.t. 17-18, in P.E.s. 13-16. 
The type female of nitidiceps agrees with the female of hreviceps in our 
collection in all respects, except as follows : Inferomedian keels of first 
caudal segment very distinct as granular keels in the first half of that 
segment, the space between them being quite free of granules, but in the 
posterior half of the segment the keels are quite obliterated, the space 
between them being choked with granules ; whereas, in our female speci- 
mens of hreviceps, the first caudal segment is smoothly rugulose below, the 
median groove absent anteriorly, the keels being merely indicated as the 
inner margins of the inferolateral groove, or, if distinct as crenulated or 
granular keels only in the posterior half of the segment. In the types of 
nitidiceps the scape of the pectines is free of teeth at the base over about 
one-third of its length, but not so much so in our specimens. See Hewitt 
(19). In spite of these differences, I do not regard hreviceps as a sharply 
defined variety. 
Distribution : The species is known to me from G-rahamstown, Brak- 
kloof, Kentucky farm Fish Eiver, Dikkop Plats, Grroote Ylakte (Somerset 
East District), Alicedale, Cradock, Dirkskraal (Somerset East District), 
Carlisle Bridge, and Long Hope. Dr. Purcell records it from Port Eliza- 
beth and Dunbrody (17). 
30. 0. GLABRIFRONS Peters (PI. XXV, fig. 59 ; PL XXVI, fig. 61 ; and 
PI. XXVII, fig. 74), Monatsber. Berlin Akad., p. 514, 1861. 
Distribution : The type was from Tette, and according to Pocock (5) 
and Purcell (15 and 17) this species extends from Griqualand West, 
