Pedipalpi, Ricinulei, and Opiliones. 23 



are immovably united as in the adults, while in the 

 adults the coxae of fourth pair are movable. Furthermore 

 the larva differs from postlarval stages in the tarsi of second 

 and third pairs of legs. The tarsi of third pair (pi. Ill, fig. i i) 

 have only two joints, the second not fully twice as long as the 

 first, but otherwise not showing any peculiarity worth mentio- 

 ning. But the tarsi of second pair (pi. Ill, fig. i h) are interesting. 

 Each of them has only two joints, both very large, somewhat 

 compressed and very deep, much deeper than the metatarsus; 

 the proximal joint is more than one-third as long as the metatar- 

 sus, only a little longer and deeper than the second, which has 

 the claws and even the normal subdistal sensory hair (s.) nor- 

 mally developed. - - The interesting fact that the Ricinulei 

 thus possess a larval stage with only three pairs of walking legs 

 removes the order further from all other orders of Arachnida 

 except the Acari, but in nearly all other structural features 

 hitherto known the Ricinulei have no affinity to the Acari. 



Cryptostemma crassipalpe Hans. & Sor. 



PI. II, figs. 2 a 2 h. 



This species was established on two immature specimens, 

 one among them not far from full-grown, with the full number 

 of joints in the tarsi, but the animal was light-coloured, and the 

 tergites of the three large abdominal segments were rather 

 removed from each other. The material collected by Fea com- 

 prises two immature specimens and five adult animals of both 

 sexes. It may be convenient to begin with the young specimens. 



The largest of the immature specimens is somewhat smaller 

 than the type, as its body is only 4.2 mm. long, while the type 

 was 4.8 mm. It agrees well with the description and figures 

 quoted, excepting that the femoral part of the palps is only 

 half as thick as. long, while in the type it was distinctly more 

 than half as thick as long, but this difference is in other forms 



