88 _ Mr. R. I. Pocock on some 
Apart from the form of the flagellum, the male of this 
species may be recognized from the male of Keyserlingii and 
of paludicola by its longer head, shorter legs and palpi. 
The female is harder to discriminate. 
In the structure of its flagellum the male approaches S. cheli- 
cornis of Licht. and Herbst (=jubata, Koch), a species which 
is unknown to me. But the three figures that have been 
published of the mandible of that species agree at least in one 
respect, namely in showing that the recurved portion of the 
flagellum starts a long distance behind the apex of the upper 
jaw. 
Solpuga nigrescens, sp. n. 
Colour black or very deep green throughout, hairs on abdo- 
men and the long ones on the appendages reddish ; the genital 
operculum pale in the middle; coxal racquets also entirely 
ale. 
: In general structure this species resembles S. ferox, but, 
apart trom colour, certain other differential characters may 
be made out. The ocular tubercle is smaller (cf measure- 
ments) and the legs and palpi are shorter, ¢. e. the protarsus 
and tarsus of the palp are shorter than the width of the 
cephalic plate, whereas in ferox they are longer; so, too, 
are the tibia of the palp and the tibia and protarsus of the 
fourth leg more noticeably shorter than the width of the 
cephalic plate than in ferox; and, lastly, the posterior 
borders of the two halves of the genital operculum are more 
convex than in the last species. 
Measurements in millimetres.—Total length of trunk 34, of 
head 6°7; width of head 10, of ocular tubercle 1°6; length of 
mandible 13, of palp 26:5, its tibia 8, protarsus and tarsus 9°2 ; 
of fourth leg 42, its tibia and protarsus about 8. 
Loc. Lower Zambesi (J. Grant). 
The above measurements show that, although the cephalic 
plate of S. nigrescens is actually slightly wider than that of 
S. ferox, the ocular tubercle is noticeably narrower, and the 
segments of the palpi and legs noticeably shorter. 
Solpuga Butlert, sp. n. 
¢. Colour (dry example). Head, mandibles, legs, and 
palpi entirely fuscous ; abdomen pale. 
Cephalic plate not very high, equalling in width the pro- 
tarsus of the fourth leg, but noticeably less in width than the 
tibia of the fourth and the tibia and protarsus and tarsus of 
the palpus. Ocular tubercle low, moderately wide. Man- 
dibles with their dentition as in 8. feroz, ¢. e. with two small 
