some neiv African Spiders. 327 



a relatively small thickened sclerite lodged in the infero- 

 external angle. (Fig. C, p. 322.) 



Total length 17 millim. 



Loc. Estcourt, in Natal, 4000 feet {G. A. K. Marshall, 

 type); Vry burg, British Bechuanaland; Port Elizabeth (Z)/*.^. 

 JBroojn) ; Brak Kloof, Grahamstown {Mrs. White); Salisbury, 

 Mashonaland {G. A. K. Marshall). 



I formerly (Ann. & Mag. Nat. Hist. (7) i. p. 311, 1898) 

 referred this species to G. Vinsonity Thorell, on account of 

 the length and wide separation of the processes of the vulva. 

 Kecently, however, I have received from Mr. Qaekett an 

 example of C. nodulosa, Poc, from Zululand ; and since the 

 description of the vulva of G. Vinsonii applies more closely 

 to this organ in G. nodulosa than in G. corticosa, I have 

 been compelled to abandon the old supposition with regard 

 to G. Vtnso?iti\ and to give a new name to the form I at one 

 time supposed to be that species. 



Thorell's (Eug. Resa, Aranece, pp. 4-9) contribution to 

 our knowledge of the South- African forms of the genus 

 Ccerostris may be summarized as follows : — The species 

 Simon, probably rightly, determines as G. sexcuspidata, Fabr., 

 Thorell describes as C. mitralis, Vins., with two varieties, 

 humilis and turrigera, based upon the form of the abdomen. 

 As separate species he describes G. Kei/serlitigti and G. Wahl- 

 hergiiy based also apparently upon tiie form of the abdomen. 

 At all events, since the vulva is said to be alike in the three 

 species, it is probable that they all belong to one and the same 

 iorm, namely G. sexcuspidata. G. Vinsonii, on the other hand, 

 is no doubt distinct. The vulva is described as follows : — 

 " Vulva ut in iis [i. e. mitralis, Wahlbergii, and Keyserlingii'] 

 transversa, sed fovese ejus dure minores sunt, et antice plaga 

 elevata, transversa, cornea, qua3 impressione media, postice 

 latiore notatur, est liraitata; aculei duo recurvi, basi non 

 uniti, in margine anteriore hujus plagse longe ante foveas 

 conspiciuntur." 



Gcei'Ostris Darlingi, sp. n. 



? . — Nearly related to C. sexcuspidata and G. corticosa, 

 but differing from the latter in that the fringe on the poste- 

 rior side of the femur consists of expanded, flattened, blade- 

 like hairs. 



Vulva somewhat like that of G. corticosa, but with a distinct 

 transverse sclerite in front of the eminence bearing the 

 stylets ; tiie latter much thicker at the base than in G. corti- 

 cosa and not quite so widely separated ; the two fovea? have 



