Solifuge in the British Museum. 93 
parallel-sided, extends only to the ninth segment, and is 
anteriorly continuous with the white of the thoracic segments. 
Rhax ornata, sp. n. (PI. IV. figs. 2, 2 a.) 
Colour. Head black, yellow along the antero-lateral border ; 
mandibles fulvous above, infuscate externally ; thoracic seg- 
ments behind the head white; first, second, and third abdo- 
minal terga black ; fourth yellow; fifth yellow in the middle, 
black at the sides; sixth and seventh black ; eighth and ninth 
yellow ; tenth black; sides and lower surface of abdomen 
brownish ; legs and palpi yellow, ringed with black, palp 
with a band round the femur and another round the tibia ; 
tarsus and distal half of protarsus also black; first leg with a 
black ring round the femur, tarsus deep brown; second and 
third legs also with a ring round the femur; fourth leg with 
a black spot on the lower side of the femur. 
Ocular tubercle without additional sete. 
Mandibles powerful, the anterior denticle on the movable 
digit far in advance of the posterior; on the immovable digit 
there is a wide space between the second and third teeth; the 
terminal fangs of both digits long and slender. 
Legs and palpi slender and longish ; tibia of palp consider- 
ably longer than the protarsus and tarsus, the latter unarmed 
beneath, “the protarsus, like that of the legs of the first pair, 
normally spined_ below. Spine-armature of the remaining 
legs also normal, but the spines prolonged distally into seti- 
form terminations; cox of the first, second, and third legs 
armed below with a pair of spines set transversely (when the 
spines have been broken off, their situation may be easily 
recognized by the scars). 
Measurements in millimetres.—Total length of body, from 
ocular tubercle to anus, 30; length of abdomen 17:5, of 
head 7; width of head 12; length of mandible 18, of palp 25, 
of its tibia 9°3, protarsus and tarsus 7°5, of fourth leg 35. 
Loc. Mombasa. A single male example. 
Somewhat resembling the male of Rhax termes of Karsch, 
judging from the description of the latter, but certainly 
differing in having black markings on the appendages, white 
thoracie segments, and the fourth and fifth abdominal terga 
pale above; moreover, the structure of the mandible is quite 
different in the two species (compare figures). 
