50 ARKIV FÖR ZOOLOGI. BAND 2. NIO 8. 



First Legs. — Eobust (fig. 1 c), nearly ''/-. as long as the 

 body. Coxa terminates somewhat behind the distal angle of 

 the mandible (fig. 1 b). Femur conspicuously longer than 

 tibia. Foot nearly as long as tibia, slightly more than eight 

 times longer than deep (fig. Id); second metatarsal joint as 

 long as the sum of the five proximal tarsal joints; terminal 

 joint somewhat shorter than the sum of the three proximal 

 tarsal jointe, and slightly less than half as long as the whole 

 metatarsus. 



Foiirth Legs. — Robust and slightly longer than the body. 

 Femur slightly more than twice as long as deep. the upper 

 part of its base produced in the proximal direction into a 

 strongly convex protuberance above the trochanter (fig. 1 e). 



Flagellum. — Slightly more than four times longer than 

 deep (fig. 1 f), very distinctly four-jointed; second joint scar- 

 cely as long as the third; fourth joint a little shorter than 

 the sum of the three other joints. Some of the setse are very 

 long, the longest pairs are even rather little shorter than the 

 whole flagellum. 



Measuremeiits. — Body 2.8 mm.; palps 1.4 mm.; first legs 

 3.4 mm.; fourth legs 2.9 mm. 



Colour. — Body and appendages somewhat diaphanous, 

 olivegreen; on the anterior part of ceph alo thorax and on the 

 palps the colour has a reddish tint; the antennse are bright 

 yellow-red. 



Locality. — Seychelles; one specimen (E. Simon's col- 

 lection). 



Remarks. — Judging from the long foot of first pair of 

 legs, the large angle on the trochanter of the palps, the colour 

 and the small size of the specimen I would be inclined to con- 

 sider it an immature female, but the existence of the curious 

 sacs described on p. 26 and guessed to be spermatophores 

 induces one to believe that it must be adult. It is rather 

 closely allied to S. insignis, but it is easily separated from 

 this and all other species by the shape of the proximal part 

 of femur of fourth legs. 



Trithyreus Kraepelin (1899). 

 (Tripeltis Thorell; Triplomus Cook.) 

 On the characters of this genus or rather subgenus see p. 34. 



