A Survey of the Scorjjion Fauna of South Africa. 
165 
G-rahamstown and Fort Brown) which seems referable to whitei ; its measure- 
ments are as follows : Length of carapace 10 "5 ; first caudal segment, length 
9, posterior height 3, posterior breadth 2*6 ; second caudal segment, length 
12 25, posterior height (not including spine) 3'1 ; third caudal segment, 
length 13-1, fourth caudal segment 14-6, fifth caudal segment 14; vesicle, 
length 6-2, height 2*75; length of movable finger 11, of hand-back 10*3, 
breadth of hand 6-75; last] tergite, breadth 8-5, length 8. Pectiual teeth 
16-18. 
A variety occurring at Cradock is rather like my H. gracilis var. 
namaquensis, and but for the fact that the terminal teeth of the superior 
keels on the second and third caudal segments are strongly spiniform in the 
male, there could be little justification for specifically separating the two 
forms. This variety I now describe under the name of H. trichiurus var. 
graciloides (PI. XXT and XXXII, figs. 35, 93 and 97 ; also text-fig. 5 (1) 
and (2). The types are one adult male and three adult females from Cradock 
(D. White-Cooper). 
In the male the carapace is only moderately excavated in front, in the 
female rather more deeply so. The superior crests of the fifth caudal 
segment of the female, as well as male, are strongly denticulated. Supero- 
anterior crest of humerus with 13-16 granules in both sexes. Caudal 
segments of both sexes more slender than in whitei. The measurements 
are : Total length, M. 143, F. 101 ; length of carapace, M. 12, F. 13 ; length 
of last tergite, M. 9-5, F. 8-5 ; breadth of same, M. 9 5, F. 10-2 ; length of 
first caudal segment, M. 12-2, F. 7*5 ; posterior breadth of same, M. 2*5, 
F. 2"5 ; posterior height of same, M. 3, F. 3 ; length of second caudal segment, 
M. 16, F. 9-4 ; height posteriorly at base of spine, M. 3-15, F. 3 ; length of 
third segment, M. 17*1, F. 9-5; length of fourth segment, M. 18-5, F. 1075; 
length of fifth segment, M. 17-5, F. 11; length of vesicle, M. 7-5, F. 7-5; 
height of vesicle, M. 3, F. 2-6; length of hand-back, M. 1275, F. 1415; 
breadth of hand, M. 67, F. 8-5 ; length of movable finger, M. 11-5, F. 13'5. 
Pectinal teeth, M. 17, F. 13-16. 
We have specimens of a smaller size from Eooispruit, near Rosmead 
(A. G-ibbons). The male of this small form has the following measure- 
ments : Length of carapace 11, of first caudal segment 975, of second 
segment 13, of third segment 1375, of fourth segment 15*6, of fifth seg- 
ment 14*3, of vesicle 6-25, posterior height of first caudal segment 275, 
posterior height of second caudal segment 2'8, length of movable finger 10'6, 
breadth of hand 6-5. Pectinal teeth, M. 16, F. 13-15. 
The British Museum has a still smaller male specimen from Deelfontein. 
The anterior excavation of the carapace is deeper than in the Cradock male, 
whilst the last tergite and the external surfaces of the femora are more 
coarsely granulated. The measurements are as follows : Length of cara- 
pace 1075, of hand 20*5, of hand-back 11-5, of humerus 11*6, of first caudal 
