478 Annals of the South African Museum. 



likewise obtains, the abdomen being- lighter and more testaceous above, 

 the spots joined together and the under side of the abdomen pale. 



The stages represented and presumably explained by the variations 

 and state of maturity of the .specimens are as follows : 



Juvenile specimens have the abdomen deep black above and orna- 

 mented with 7 testaceous spots ; 5 are arranged just as in U. quinyue- 

 notata,vfiili the addition of two extra ones between the median laterals 

 and the terminal central spot. The additional spots may be large, 

 small, occasionally merged or even absent. The next stages, which 

 are most plentifully represented, are probably just adult, and the 

 majority greatly resemble U. srhinzi, being distinguished therefrom 

 by the vulva and sternum. Some, however, retain the 7 spots, dull 

 and more or less linked when adult ; others show 5, 4 and 2 according 

 to the amount of black pigment present ; all, however, have the same 

 characters in eyes and vulva, etc., and can hardly be separated 

 specifically. 



The large and old adult stages have often all black abdomens above, 

 sometimes with a cinereous tinge; others show traces more or less 

 distinct of the two anterior abdominal spots, which are the largest and 

 clearest in all stages. 



The above are possibly only variations of U.xchhi;;!, but other speci- 

 mens in the Museum collection, from Little Namaqualand, are lacking 

 in the brown markings on the vulva, and otherwise agi'ee more closely 

 with the description of U. schinzi ; hence U. sei>tniui<>fiif<i has been 

 separated as above. 



The variable markings of the abdomen are apparently usual in the 

 genus, since U. indica (Poc.) recorded from India has occasionally 

 7 spots. 



9 . Colour. Carapace dark brown ; sternum pale testaceous with 

 brown border ; coxae brown, being the same colour or lighter than the 

 border of sternum. 



Posterior border of labiuni and maxillae dark brown (in U. schnr:i 

 the brown border to the sternum is not so prominent, and the coxae 

 are the same colour as the sternum itself). Abdomen as described 

 above, and bearing stiff black hairs anteriorly, which curve over 

 abdomen above cephalothorax. 



Leys. Well clothed with hairs and spines, especially the posterior 

 pairs ; colour as in U. schinzt, but tending often to be dark mahogany 

 iu shade. 



Vulva. Seen in spirits, its characteristic form is as in fig. 12 A ; 

 exceptions, however, occur in which the 2 lateral marks are closer 

 together and coalesce, or are joined by a dark band. The specimens 



