BIHANG TILL K. SV VET.-AKAI). IIANDL, BAND 2S. AFD. IV. N:0 1. 9 



Kam. Dysderidse. 

 Subfam. Dysderinae. 



Orsolobus Simon 1893. 



EuG. Simon, Hist. nat. d. Araign., ed. 2, t. 1, fasc. 2, p. 319. 



As tlie type for this gemis Mr Simon has constitiited a 

 species described by Nicolet in Gay, Historia fisica y politica 

 de Chile, Zoolog ia III, p. 340, as belonging to the genus 

 Segestria: S. singularis Nic. In Hist. Nat. d. Araignées, T. 1, 

 p. 316 and 319, Mr Simon gives an account of the exteriör 

 morjjhology. He comes to that result tliat tbis genus is most 

 related to the genus Stalita Schiödte, which has the eyes 

 reduced and which lives in caves in the southern parts of 

 Europé. 



In the collection of Mr Dusen are two specimens — ma- 

 les — , which I believe must be a species of Orsolobus. Con- 

 cerning the cephalothorax it is broad oval, a little convex 

 and has the pars cephalica much narrow^er, of uniform breadth 

 and in the front transversely abrupted. The eyes arranged 

 in a transverse area, four in the a little procurved front- 

 row and the two posterior ones obliquely behind the anterior 

 lateral ones. The cheliceres are about twice as long as broad, 

 tapering towards the apex. The claw short and the inner 

 margin of the claw-furrow with two teeth, separated by an 

 interval, the outer one even with two teeth nearly conti- 

 guous. The laniinte raaxillares and the labium are perfectly 

 agreeing with those of the genus Harpactes (conf. the fig. 

 271 published by Mr Simon, 1. c. p. 309). The sternum is 

 broadly cordated and, projected between the posterior coxfe. 

 The legs are long and slender. By O. singularis Sim. the 

 anterior tibise and metatarsi have spines. By the spe- 

 cimen in m^' collection I have seen some very small spines 

 only on the front-side of the tibiee and at the apex of the 

 metatarsi III and IV. The tarsi of the legs are a little 

 clavated towards the apex and have two large claws situated 

 on a short onychium (conf. Pl. I, fig. 2 c). Only by the ab- 



