1898.] CTENIFOBM SPIBEBS OF AFRICA, AllABlA, AND Si'KIA. 25 



clothed beneath with thick scopulfe. Tib. iii. and iv. with 1 — 1 — 1 

 dorsal spines, besides lateral and inferior spines. Protarsi iii. and 

 iv. spinose, inferior apical spines two. Claw-tuft present. Tarsal 

 claws two. 



Palpus. Tibia three times longer than broad, with short external 

 apical black spur, having on each side at base a short distinct cusp. 

 Tarsus piriform. Organs occupying whole breadth of tarsus, 

 consisting of a broad flat chitiuous disc, surrounded by a stout broad 

 circumferential marginal piece, terminating at apex in an abruptly 

 curved point, directed backward ; and a central lobe, short, curved 

 at base, dilate at apex, simple. 



A fine male of this large silky-haired Ctenus was taken at 

 Mombasa. Another male was taken by the late Emin Pasha on 

 the southern shores of the Victoria JSTyanza, while a third of the 

 same sex was taken at Kavala Island on Lake Tanganyika by 

 Mr. Carson. Two adult males were also obtained. 



Ctenps buktoni, sp. n. (Plate III. figs. 3 a-f.) 



c? . 27 mm. Mab. Cameroons, W. Africa, coll. Burton. Type 

 in coll. Brit. Mus. Nat. Hist. London. 



Total length 27 mm. Carap. 12 x 9-.5. Legs 1, 4, 2, 3. Pat. -f- 

 tib. i. 22-5. Pat. -I- tib. iii. 15. Pat. + tib. iv. 18. Prot.i. 17— iii. 

 13-25, iv. 19-5. 



Structure and colour similar to those of C. johnstoni, except that 

 the pubescence is rufous-yellow rather than oclire-yellow ; while 

 the basal half of the mandibles is clothed with rufous pubescence, 

 strongly contrasting with the black apical half. Abdomen with 

 narrow black central band, broad at genital rima, attenuate behind. 

 Eyes. Second row straight, line passing through centres of posterior 

 centrals falling just within posterior margin of laterals ; centrals 

 5 a diameter apart, g a diameter from laterals, and twice the size, 

 by transverse diameters; posterior laterals slightly smaller than 

 centrals, over one diameter from them, situate on a black tubercle. 

 Ocular quadrangle scarcely broader than long. Anterior side 

 slightly shorter ; central anterioi's slightly smaller, ^ a diameter 

 apart, ^ a diameter from posterior centrals. Clypeus one-half 

 wider than diameter of anterior central eye. 



Falp-us two and a half times longer than broad, broader towards 

 ppex ; external apical spur short, stout, abruptly curved, bifid at 

 apex. Tarsus elongate-piriform, having at base on upper outer 

 side a short, very stout, curved, sharp, conical spur, its point 

 directed forward and outward. Orga,ns occupying whole width 

 of tarsus, having two stout central lobes, their apices curved 

 towards each other, the outer being stouter, its point lying behind 

 that of the inner, which is longer and more slender. 



This western form, though obviously congeneric with the males 

 from the Victoria Nyanza district, differs distinctly in the position 

 of the eyes, and in the presence of a black band beneath the 

 abdomen. 



The tibial palpal spur and the organs are of course different 



