A Survey of the Scor]jion Fauna of South Africa. 103 
median keels of each caudal segment, except the first, tend to merge into 
each other and cannot be sharply separated ; pectinal teeth usually nume- 
rous, 13 to nearly 30 in the adult male ; cutting edge of fingers armed with 
2 continuous parallel rows of teeth ; carapace and pedipalps more or less 
strongly depressed Hadogenes, Kraepelin. 
Ventral surfaces of brachium and of hand with only few trichobothria 
near the posterior margins ; tail not so strongly compressed laterally, not 
modified in the adult male ; the two iuferomedian keels of each caudal 
segment are well separated from each other except sometimes in segment V ; 
pectinal teeth not more than 10 . . . . . . . .2 
2. Cutting edge of fingers armed with 2 continuous parallel rows of 
granular teeth ....... Opisthacanthus,'^ Peters. 
Cutting edge of fingers armed with only a single continuous row of 
granular teeth, adjacent to which inferiorly there is a series of about 5 or 
6 widely separated teeth ..... Cheloctonus, Pocock. 
Fam. BUTHIDAE. 
aen. BUTHIJS Leach. 
1. B. TRiLiNEATus Peters, Mon. Ak. Berlin, p. 515, 1862. 
Distribution : The type was recorded from Tette ; an immature specimen 
in the Transvaal Museum collection was taken in the Transvaal, north of 
Zoutpansbergeu ; it is recorded by Mr. S. Hirst (24), from Peira District, 
from East Bank Loangwa, P.E.A., and from Madona, North-East Ehodesia ; 
according to Kraepelin (10) it extends to G-erman East Africa. In the 
Transvaal specimen all the keels of the last abdominal sternite are rather 
strongly granular ; there are 13-14 granular rows on the digits and 25 pectinal 
teeth ; the superciliary ridges and groove of the ocular tubercle are granu- 
lated. It seems doubtful whether this species can be separated from 
B. minax L. Koch, of the Sudan, and Erythraea, and as Peters' type is lost 
and his description incomplete, Kraepelin has recently abandoned the name 
trilineatus (see Mit. a. d. Nat. Mus. Hamburg, xxx, p. 169). 
2. B. coNSPERSus Thorell, Actes Soc. Ital. Sci. Nat. xix, p. 115, 1877. 
The specimen on which this species was founded came from " Caffaria," 
where it was taken by Wahlberg. The type was almost certainly immature, 
being only 39 mm. long, but it was probably quite distinct from trilineatus, 
with which it has been associated by Kraepelin (10), and quite recently it 
is recognised by that authority as a distinct species. Unfortunately the 
type is the only specimen yet recorded. 
* The related genus Jomachus is recorded by Kraepelin from " Natal " (J. politus 
Poc.);, but the record needs confirmation. 
