BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND. 28. AFD. IV. N:0 1. 11 



lengtli of the tibdomen 2,r> mm. 



breadth » > l,i 



length »» 1st leg 7,i 



•? X- » 2d (j,ö ; 



•;- » » 3d » ;'),(! >. 



y> » ~> 4th » 6,'.i » 



Two males from the npper part of the Aysen Valley, 

 Jan. 1897. 



From the species O. singularis Nic. my species differs in 

 several parts. The greatest difference is in the pedipalpi, 

 which is easily visible b^^ a comparison between the figures 

 published by myself and by Mr Simon (Hist. Nat. d. Araign. 

 T. I, p. 316, fig. 283). An examination of the description 

 published hj Nicolet 1. c. p. 346 shows the following diife- 



rences: >.thorace — gibboso — ; pedibns robustis Q) 



» >: — corselete cubierto de largos pelos blondos, 



con visos de nn hermoso color violeta». 



Fam. Theridildae. 

 Theridium Walck. 1805. 



Walckenaer, Tabl. Ar. 1805, p. 72 (a. p.)- 



T. gracile Keyserling 1884. 



Male. — Ce2)haloiliorax dark brown, a little lighter on 

 the pars cephalica, comparatively convex, broad oval, in the 

 front nearly as broad as the half breadth of the pars thora- 

 cica; about as long as the second femnr. The middle-pit 

 short, blackish. The pars cephalica by distinct side-furrov^"s 

 separated from the pars thoracica. The clj^peus a little higher 

 than the area of the middle-eyes. 



Eyes. — The front-row nearly straight (very little re- 

 curved); the eyes about equal in size and the interval between 

 the two middle-eyes a little longer than the distance from 

 the lateral ones. The two lateral eyes a little prominent 

 and contiguous. The area of the middle-eyes more broad 

 than high, in front as broad as behind. The hind-row nearl}* 

 straight (a little procurved); the eyes nearly equal in size 

 and the interval between the two middle-eyes a little shorter 

 than the distance from the lateral ones. 



