'98 Annals of the South African Museum. 



which is rapidly and completely extracted by spirits {capcnsis, 

 balfouri). 



In the above no account is taken of the legs, as their colour varies 

 with the species rather than with the colour of the trunk. The dorsal 

 surface of the legs almost always retains much dark green or black, 

 even in the reddest specimens; red papillee may be present or absent 

 according to the species, and sometimes also according to the locality 

 in which it was found. 



The narrow black medio-dorsal stripe, divided longitudinally by a 

 fine white median line, is always present and well defined, even in 

 the darkest specimens, and there is generally also a dark stripe on 

 each side joining the bases of the legs. 



The antennae have always much dark pigment, although often with 

 admixture of red. 



The skin between the papillae on the head is sometimes pallid 

 (balfouri), and occasionally orange-yellow {cinctipes). White-headed 

 varieties, in which the greater part of the head is devoid of pigment, 

 sometimes occur (moseleyi, balfouri). 



The red pigment appears to be present in several modifications. 

 Thus in balfouri and leonina from the Cape Peninsula the red of 

 the papillae soon dissolves in spirits, whereas red specimens of 

 sedgivichi and moselcyi still retain the red of the dorso-lateral surface 

 after an immersion of four years and longer, even when exposed to 

 light. The colour is, however, not so bright as it was originally, and 

 is evidently gradually fading. Eeadily soluble and insoluble red 

 pigment may even occur in specimens of the same species. Thus 

 a large brick-red and a smaller greenish-red specimen of capcnsis, 

 found at the same time and place, were put into spirits, with the 

 result that the large species is still brick-red after nearly a year, 

 while the smaller specimen lost almost every trace of its red within 

 a few days and became dark green. 



The reddish pigment of the ventral surface was always of the 

 soluble kind in the various species in which it was found. 



With regard to the distribution of the red and the dark varieties of 

 the same species, it appears that some localities produce only black 

 or dark-green specimens; others both black and red ones; others, 

 again, apparently only red specimens. Thus capcnsis from the 

 mountain-sides at St. James (False Bay) and Platteklip (Cape Town): 

 is black, but specimens from the flatter country on the Peninsula 

 (Diep Eiver, Plumstead, and Wynberg) are frequently, perhaps 

 mostly, red or reddish. 



No red specimens of leonina and clavigera have as yet been found. 



