90 Mr. R. I. Pocock on some 
first tooth of the posterior series small; moreover, the apex 
of the terminal fang is directed downwards. 
In the female there is only one small tooth between the 
second and third large ones on the upper jaw, and the poste- 
rior angles of the genital operculum are produced. The head, 
mandibles, legs, and palpi are brownish or yellowish red, and 
there is a dark stripe down the middle of the back, which 
becomes black towards the hinder end. 
Some of the measurements of the two species are as 
follows :— 
@. Length (abdomen shrivelled) 20; length of head-plate 
5°5, width 7°5, of tubercle 1:2; length of mandible 10:5; 
tibia of palp 7; protarsus and tarsus 7°5; tibia of fourth leg 
7°5, protarsus 6°5. 
&. Width of head 6, length 5; length of mandible 9 ; 
tibia of palp 9°3, protarsus and tarsus (noticeably curved) 9°8 ; 
tibia of fourth leg 9, protarsus 7:5, 
Loc. “S. Africa, near the tropic of Capricorn.” 
The male example of this species is the one that Mr. Butler 
identified as S. chelicornis. 
Solpuga Derbiane, sp. n. (PI. IV. fig. 8.) 
= 8, jubata, Koch, Butler, Tr. Ent. Soc. 1873, p. 421. 
g. Colour (dry) rufo-fuscous, with a dark median dorsal 
band, posteriorly blacker, on the abdomen; clothed with 
white hairs; the palpi and legs of the fourth pair become 
nearly black distally. 
Head as wide as the length of the protarsus of the fourth 
leg, but shorter than the tibia of the palp. Mandible much 
resembling that of S. hostilis, but with the upper jaw 
straighter, extending further beyond the flagellum, not or 
scarcely toothed on its inner side ; on the lower jaw the teeth 
are larger, conical, and more to the front ; the first, moreover, 
is on both sides small and apically bifid, somewhat as Karsch 
has described for S. scopulata; the flagellum does not 
approach so near the apex of the jaw as in hostilis, and, 
curving more sharply backwards, fails to reach the edge of 
the carapace. 
The palpi have the protarsus less bowed than in hostilis, 
and the scopula is composed of red hairs, and not of grey 
ones, as in that species. 
Measurements in millimetres— Total length 25; width of 
head 7°5, length 5; length of mandible 10°5, of tibia of 
palp 85, protarsus and tarsus 9; tibia of fourth leg 8 
protarsus yigiy ; 
