l6o ENTOMOLOGISK TIDSKRIFT 1900. 



Obisium (Roncus) euchirus E. S. 1879. 



Several specimens from Ibiza, San Antonio (i8-Vi27o) col- 

 lected in the »Cueva de Sta Inez» by A. Lindahl and belonging 

 to the same museum. 



This interesting species has at first been described by Mr. 

 EuG. Simon in his excellent work, Les Arachnides de France 

 T. 7, p. 65, from Bouches-du-Rhône : Martiques. A comparison 

 with his diagnosis induced me to think he has only had young 

 specimens, and when he has been so kind as to send one of 

 his, I am able to confirm it, for my specimens are in all 

 parts greater. 



Measurements of the joints of the pedipalpi. 



II III IV Va Vb 



Length 0,5g mm. 1,29 mm. 1,17 mm. 1,17 mm. 1,17 mm. 



Breadth 0,35 v 0,35 )> 0,46 >> 0,7 » 



Length of the céphalothorax 0,98 mm. 

 Breadth » » » o,8g » 



Length » » body 3,.>) — 4 » 



To his diagnosis I can further add: céphalothorax and pedi- 

 palpi very dark red-brown; flagellum consists of six simple hairs, 

 ■on the fore-edge clothed with very fine downs. 



Upsala, December 4, 1899. 



