586 IVAR TRÀGARDH 



top, which is truncated. The distal half of the tarsi is provided 

 with a comparatively very large number of fine hairs, most of 

 which are half as long as the joint, and some still longer 

 (fig- 106). 



The claws, which are smaller than those of the other legs, 

 but pointed and sharply curved, hâve no empodia, nor any 

 submarginal slips, and are attached to a short peduncle. 



Ambulacres II to IV of unif orm shape (fig. 107), with 

 larger claws, on thicker peduncles. Between the claws there 

 is an e m podium, the exact shape of which I hâve failed to 

 discover, but which is small and seems to be tongue-shaped ; 

 at the base of the claws, lateraUy, there is a pair of narrow, 

 setiform slips, curved like a hook at the top of legs III and IV, 

 but straight in legs II. 



On the ventral sidewe notice that the small stigmata are 

 placed on a level between coxae III and IV, ant that the 

 peritremata are very long, running forwards above the base 

 of gnathosoma, where they bend backwards, and towards 

 each other, for a short distance. 



This feature is very remarkable. In the adults of the genus 

 Zercon the peritremata are very short, and as a rule in the 

 Parasitidae the length of the peritremata increases during 

 the growth of the animal ; hence it is likely that the species 

 is no Zercon. On the other hand it is possible that the short 

 peritremata of Zercon are a recently acquired characteristic 

 and that the nymphœ still préserve the more primitive 

 feature, the long peritremata. 



Subfam. Uropodinae. 

 UROSEJUS Berl. 



This peculiar genus is generally referred to the Uropodi- 

 nae, as is also Trachytes Micli. It seems, however, doubtful 

 whether this is their proper place. In a previous paper I hâve 



