34 
Annals of the Transvaal Museum 
seems to differ as follows : the flagellum is shorter and its anterior bend more 
forwardly situated : there is a distinct interval between the first and second 
teeth of the lower jaw. 
Dentition . The terminal fang of the upper jaw is short: there are three 
distinct anterior teeth, the first being small and the second and third of 
moderate size : there follows a long toothless interval terminated by the fourth 
tooth which is small and the fifth which is large but not much larger than the 
third : in the double series, the outer row has four teeth but the inner one only 
three, of which the distal one is largest. On the inner side of the jaw dorsally, 
near to the terminal fang and just in front of the anterior bend of the flagellum, 
is a prominent sharp pointed tooth terminating an abbreviated keel or ridge. 
The lower j aw has three teeth, the distal one largest and longest and separated 
from the small intermediate tooth by a short interval. On its outer side, a 
sharp lateral keel is only present in the distal fourth, whence it is continued 
as a line of granules to the base of the jaw. The distance between the tip of 
the fang and the apex of the first tooth is equal to about 2\ times the distance 
between the apices of the two large teeth. 
Flagellum. The basal enlargement is well elevated and has a sharply 
keeled dorsal margin: anteriorly it is only a little produced, the anterior 
bend being situated above the third tooth: the recurrent portion is sub- 
cylindrical and slender, except at the anterior bend where it is strongly 
flattened from front to back though not quite so broad as the fang at this 
point: it passes in a light curve immediately above the basal enlargement, 
and, twisting slightly outwards, terminates in an acutely pointed apex a little 
posterior to the hind margin of the basal enlargement; the length of the 
flagellum occupying a post-laminar position being much less than the distance 
between the anterior bend and the hind margin of the lamina. 
The stridulatory area of the chelicera is well developed. 
Colour. Head-plate and appendages pale brown: tibia and more distal 
segments of fourth leg dark brown, and the distal segments of the other legs 
and of the palp are also more darkly coloured than the basal segments: 
abdominal tergites pale brown with some infuscation laterally, but there is 
no strongly contrasting pigmentation on the tergites : sides of abdomen clothed 
with long pale hairs: malleoli broadly margined with black. 
Measurements. Total length 23, length of flagellum 1*7, of patella of palp, 
5-4, of tarsus and tibia of palp 6-2, of patella of fourth leg 5-75, of tibia of 
fourth leg 5*2. 
This species, and its near ally erythronota, are nearly related to 5 . lateralis. 
Solpuga derbiana Pocock [PI. II, fig. 4 and Text fig. 7], 1895. Ann. Mag. Nat. 
Hist. 6, xvi. p. 90, PI. IV, fig. 8. 
The type is labelled “Interior of S. Africa. ” Dr Purcell has identified 
therewith a species common at Grahamstown, and the information kindly 
supplied to me by Mr S. Hirst regarding the characters of the type specimen 
seems to confirm the identification. The species is known to me from Grahams- 
town, Brakkloof (Mrs G. White), Peddie and Line Drift near Peddie (B. Marais), 
Majuba Nek, Herschel dist. (J. Hepburn), and Damplaats near Burghersdorp 
(A. Kruger). 
The length of the recurrent portion of the flagellum is greater than twice 
the distance from the anterior bend to the hind margin of the basal enlarge- 
ment: and the tip of the flagellum reaches to a point situated very much 
