456 Annals of the South African Museum. 



Eyes. Posterior medians about 1 diameters apart, and at least 

 4 times the area of the anterior medians ; latter with their centres 

 about in a line with anterior margins of the posterior medians ; anterior 

 laterals slightly larger than anterior medians and than posterior 

 laterals. Ocular area 3 times as wide as long. 



Chelicera. Much as in ^ , but blunter and coarser ; bristles shorter 

 and stouter. 



Sternum. Length less than twice the greatest width. 



Legs. Metatarsi III and IV armed with 3-5 spines each, on under 

 surface, apically. 



Vulva. As in fig. 5 c. 



Measurements. Length 18 mm. Carapace 7 - 5 mm. long, and 5'7 mm. 

 wide ; i. e. ratio of length of carapace to width slightly over 1'3 : 1. 



DKESSERUS NIGELLUS, n. sp. (Plate XXIX, fig. 6). 



Specimens. One ? and juv. (No. B 2977, Type), Matroosberg ; 

 altitude 3500-3700 ft. (1/17, E. W. Tucker). 



Colour. In spirits the carapace is black tinged with red ; chelicera 

 black, legs blackish-brown, the anterior ones being darker. Abdomen 

 infuscated testaceous, clothed with black hairs ; sternum reddish- 

 brown ; labium and coxae of pedipalps darker ; coxae and under 

 surface of legs tinged olivaceous. When dry the general colour is 

 darker. 



Carapace. Equal in length to the patella, tibia and metatarsus of 

 the 1st leg, and greater than the tibia, metatarsus and tarsus of the 

 same ; also equal in length to the patella, tibia and |-| metatarsus 

 of the 4th leg. Width equal to the tibia and metatarsus of the 1st 

 leg, and to the distance from bottom of the fovea to just behind the 

 posterior median eyes. Upper surface of the carapace flat and not 

 much raised above the fovea. 



Eyes. Posterior medians slightly over one diameter apart, and 

 from. 6-7 times the area of the anterior medians ; latter very small 

 and with their centres above the line joining the lower borders of the 

 posterior medians. Anterior laterals just over twice the posterior 

 medians' diameter from the latter, and larger than the posterior laterals. 

 Ocular area 3 times as wide as long. 



Chelicera. With stiff short hairs around fang and groove. 



Sternum. Twice as long as wide. 



Legs. Metatarsus IV with 5-6 spines apically on under surface. 



Vulva. As in fig. 6. 



