2d. Studies on Arthropoda. I. 



due to age. When viewed obliqueh- there ma>- 1)e observed a 

 faint vestige of the sublateral impression on the cnculhis, wliile 

 in the type this feature was not perceived. 



Adult specimens. — Body and legs brown or dark l^rown 

 and on some places reddish ; the granules which are extremely 

 numerous, especially on the body, are in immature specimens 

 purple and therefore very conspicuous in contradistinction to 

 the yellowish skin, but in the adults they are not distinctly 

 marked off by colour from the skin ; v. hen the adult animal is 

 flried it changes its aspect, as the exceedingly numerous scales 

 are \'ery light, being somewhat slate-whitish with a yellowish 

 tint, and consequently the animal looks rather clayey, darkest 

 on the median ])ortion of tlie ventral surface where the clotliing 

 is less dense. 



The cephalothorax has the same outline and dorsal grooves 

 as the subadult type, but it differs in a curious feature. A me- 

 dian area, nearly triangular with the sides convex, is raised 

 l)etween the end of the median groove and the posterior margin 

 as a moderately large, rounded j^rotuberance or rather low 

 tubercle badly marked off, which in the male is directed mainh' 

 upwards, in the female upwards and considerably backwards, 

 so that in the latter sex the cephalothorax seen from above 

 (fig. 2 a) has the median part of its posterior margin very con- 

 spicuously ccmvex. 



Tlie cucullus (fig. 2 b) seems to be slightly broader in pro- 

 ])ortion to length than in young specimens, and a sublateral 

 oblong impression is distinct, but real grooves are not developed. 



The palps (fig. 2 c) have the femoral part a little or conspi- 

 cuously more than half as thick as long. The tibial i)art is ador- 

 ned with numerous granules on more than its distal two-thirds, 

 and these granules are oblong and rather coarse on the most 

 distal third. - (As usual in adults the thick connecting skin bet- 

 ween tlie large abdominal tergites has nearly disappeared). 



