288 Dr. A. G. Butler on 



Lnc. El (lonyo eb Urru, on the M imbasa-Uganda Railway 

 in British East Africa {C. S. Betton). 



In the absence of the female I iiave assiinud that the 

 armature and carination of the carapace in this species are 

 merely sexual characters. 



Selenops basutus, sp. n. 



$ . — Resembling- S. atomarius and S. Spenceri in having 

 seven pairs of tibial and three pairs of protarsal spines on the 

 first and second pairs of legs. 



Ei/es of ocular quadrangle * apparently as in >S'. atomarius^ 

 but the anterior laterals with their centres on a level with 

 those of the anterior medians instead of with the upper 

 edges of the latter, and the inferior edge of the posterior lateral 

 scarcely higher than the inferior edge of the anterior medians. 

 (Simons's drawing of the eyes of S. atomarius in Hist. Nat. 

 Araign. ii. p. 25, is apparently diagrammatic, to judge by the 

 exceptional height of the anterior laterals above the clypeus ; 

 but it is not possible to make the figure fit the arrangement 

 shown in S. basutus.) 



Vulva with its lateral lobes subquadrate, in contact in the 

 middle line, the line of junction marked by a groove expanding 

 anteriorly ; in front of each lobe a distinct pit, the pit of the 

 right side separated from that of the left by a broad median 

 longitudinal bar, which narrows posteriorly and runs for a 

 short distance in between the two lobes. 



Total length 18 raillim. ; carapace 7. 



Loc. Teyateyaneng in Basutoland (L. Wroughton). 



XXXVIII. — DescrijAions of new Species q/" Lycajnidae in the 

 Collection of the British Museum. By A. G. BUTLER, 

 Ph.D. 



The following are all species which I have been unable to 

 name during my recent study of the family, or which have 

 been received subsequently. 



* In Hist. Nat. Araign. ii. p. 23 (1807j, Simon, when discussing the eyes 

 of the Selenopinne, writes : — " Les auteurs ne se sont jamais prononc^s 

 8ur I'homologie des petits yeux nocturnes latero-ant^rieurs, mais, pour 

 moi, ils repr^sentent des yeux medians posterieurs tres fortement d^vi^s 

 de leur situation normale." This view appears to me to complicate a very 

 simple question ; for surely the four median eyes in this genus are nothing 

 but the four eyes of the median quadrangle, forming a trapeze unusually 

 wide behind, and not the eyes of the anterior line much or a little 

 recurved, as Simon supposes; and "les petits yeu.x: nocturnes latero- 

 ant^rieurs " are the normal antero-lateral eyes. 



