16 MB. F. O. PICKAED CAMBRIDGE OS THE [Jan. 18, 



base sftt with a tuft of fine clustered pale hairs, curving inwards 

 and backwards. 



This form, of which two adult females remain, is obviously quite 

 distinct from C. vagus and C. vividits, and from every other South- 

 African forms which have come before me. I have taken this 

 opportunity of redescribing and figuring the species, since the 

 original descriptions are inadequate. 



ClENTTS TIVIDTJS Bl. 



2 juv. 25 mm. Type in coll. O. P. C. Eab. S.E. Africa. 



2 . Total length 25 mm. Cap. 13 x 10. Legs : i. 49— ii. 45, 

 iii. — , iv. 49. Pat. + tib. i. 17— iii. 11, iv. 15. Prot. i. 11— iii. 8 

 — iv. 8. 



Colour. Carapace brown, with a broad yellowish- browTi band 

 (whose superior margin is somewhat dentated) extending along 

 each side, and a narrow longitudinal one in the middle. Abdomen 

 pale yellow, streaked and spotted with browTi. A broad dentated, 

 dull yellow band bordered with brown, and comprising a longi- 

 tudinal row of brown spots, extends along the dorsal surface, 

 and on each side is a series of brown spots. 



Structure. Tib. i. and ii. with 2 — 2 — 2 — 2 — 2 spines beneath ; 

 one or two lateral external basal spines ; one lateral internal basal 

 spine. Patella? i. and ii. sometimes with, sometimes without lateral 

 spines, iii. and iv. with one small spine on each side. Prot. i. 

 and ii. with 2 — 2 — 2 spines beneath, and a single small central 

 apical spine beneath. Eyes. Second row almost straight by anterior 

 margins, laterals slightly behind; otherwise the eye-formula is the 

 same as in C. vagus Bl. Clypeus 1 1 diameters of anterior central eye. 



Out of thirteen examples of this species from the relics of 

 Mr. Blackwall's collection, there is not, unfortunately, a single 

 adult specimen. Except in the difference in the height of the 

 clypeus, and a slight difference in the curvnture of the second row of 

 eyes, these two forms, C. vividus and C. vagus, are exceedingly aUke. 



Ctekus tagus Bl. 



2 juv. 33 mm. Type in coll. O. P. C. Hah. Zambesi, S. Africa. 



2 . Total length 33 mm. Cap. 16 x 12. Legs, i. 55— ii. 49'5 — 

 iii, 42— iv. 56. Pat. + tib. i. 19-5 -iii. 13— iv. 17. Prot. i. 12— 

 iv. 15. 



Colour. The specimen being very old the colour is merely a 

 uniform yellow-brown. Abdomen densely covered with brownish- 

 yellow hairs, having a series of broad, curved, angular lines of 

 a brown colour, with their convex sides towards each other and 

 their vertices directed forwards. 



Structure. Tib. i. and ii. with 2 — 2 — 2 — 2 — 2 spines beneath ; 

 1 — 1 outside, lateral ; 1 inside lateral, basal. Prot. i. and ii. with 

 2 — 2 — 2 spines beneath, and a single small central apical spine 

 beneath. Patellae i., ii., iii., and iv. with a single small spine on each 

 side. Ehjes. Second row straight by anterior margins ; diameter of 

 centrals more than three times transverse diameter of laterals. 



