South African Arachnida. 151 



or less distinct. Hand about 1.^ times as "svide as the tibia ; fingers 

 short, shorter even than in the type, the proportion of the length of 

 the hand-back to the movable finger being 3 mm. : 3f mm. in the 

 larger, 2f mm. : 3^ mm. in the smaller spirit specimen, and 3 mm. : 

 3 mm. in the dry specimen. (In Thorell's typical 2 24 mm. : 4|- mm.). 

 Movable finger with 11 (rarely 10) anterior flanking teeth, the main 

 rows in the middle third of this finger composed of 3-5 teeth 

 (including the enlarged basal tooth of each row). 



Pectines with 26-28 teeth in the <? (in Thorell's ^ specimen 29-30, 

 in his $ 24) ; the posterior basal lamella of the scape normal, not 

 lobate in the <3^ (but produced into a broad lobe behind in the $ , 

 according to Thorell). 



Measurements of largest S' • — Total length 41 ; length and width 

 of cephalothorax 4^ ; distance of eyes from anterior margin 2, from 

 posterior margin 2i ; length of femur of pedipalp 4, of tibia 4, of 

 hand-back 3, of movable finger 3f ; width of femur 1, of tibia 1^, of 

 hand If ; length of tail 25, of first caudal segment 3^, of second 3f , 

 of third 3ij , of fourth 4^, of fifth 44, of sixth 44 ; width of first and 

 fifth segments 24, of second, third, and fourth 2|-, of vesicle 2;^; 

 height of fourth segment 2^, of fifth 24 ; length of upper surface of 

 first segment 2, width of this surface in its middle 1^. 



This remarkable species is well characterised by the converging 

 inferior caudal crests of segments 2-3, the U-shaped transverse 

 crest of segment 3, the absence of crests from the sides and under 

 surface of segment 4, the large eyes and the short fingers. Its area 

 of distribution, as far as known, includes German South- West Africa 

 and Bushmanland, in the north-west corner of Cape Colony. 

 Pocock has recently described a species under the name P. cristatus, 

 in which the second, third, and fourth caudal segments show all the 

 structures characteristic of hrevimanus. No structural character 

 whatever is mentioned in Pocock's diagnosis, which would dis- 

 tinguish this species from brevimamis, but as the locality is stated to 

 be the Congo and the total length 62 mm. it would perhaps be 

 iinwise to assume that the species are necessarily identical. 



4. PaRABUTHUS LiEVIFEONS (Sim.). 



1887. Butlms I., E. Simon, Ann. Soc. ent. France (6), v. 7, 

 p. 379. $ . 



1899. Parabuthus I., Kraepelin, Das Tierreich, Scorp. and Pedip., 

 p. 30. 



The following description has been made from 3 ^ with incras- 



