Ctcniform Spiders of Ceylon^ Barmahf tOc. 345 



Ctenus Ifosei, sp. n. 

 (PI. IV. figs. 11, 17, 20, 28-30.) 



^fe<lfturemetlts. — <^ . Tot. leii. 17 mm., carap. 9"/>; legs i. 

 34, ii. 30, iii. 25, iv. absent ; ant. marg. of carap. 3'7o ; 

 pat. + tib. i. 12, iii. 8. 



? . Tot. len. 22 mm., carap. 10; legs i. 29, ii. 27, iii. 23-5, iv. 

 33"5; ant. marg. of carap. 5; pat. + tib. i. 10, iii. 8, iv. 9'75. 



(^ . — Colour. Carapace mahogany-brown, witli broad 

 central band of silvery-grey pubescence, with a pair of obscure 

 dark spots beliind eyes and attenuate at base of carapace. 

 Marginal grey band broad. Abdomen with double dorsal 

 series of obscure dark spots, or with broad ])aledcntated band, 

 the marginal interstices picked out with black. Dark brown 

 beneath, with two more or less distinct white lines and two 

 shorter ones immediately behind vulva. Legspaler mahogany- 

 brown, very indistinctly annulated beneath femora. A[)ical 

 half of tibiaj of all four pairs of legs (iv. absent?) clothed 

 with silvery pubescence. Coxai of legs clothed with silvery- 

 grey pubescence above. 



? . — Colour similar to that of the male, but no silvery- 

 white pubescence on tibite or carapace. Pubescence rufous 



(J . — Structure. Carapace gibbous behind, abruptly inclined 

 to base. In other respects similar to that of C. ThorelliL 



? . — Structure. Carapace horizontal above, abruptly in- 

 clined to base. Otherwise similar to tliat of G. Tkorellii. 



Pedipalp. Tibia one third longer than broad, with a 

 short, broad, curved, dark apophysis on outer side, squarely 

 but irregularly truncate at apex. Tarsus short and very 

 broad, produced at base above into a stout pointed cone, 

 terminating in a thin aculeate spur, strongly curved, directed 

 outwards. 



Palpal organs broad, simple. Central lobe small, produced 

 on inner side at base ; beyond its apex are two siiort spurs, 

 lying close together, their points directed outwards. 



Vulva as broad as long, convex ; a black corneous margin 

 encloses a transverse oval paler space, including a low convex 

 tubercle on each side, and converges behind, forming a narrow 

 transverse plate curving downwards. On each side of this 

 plate is a corneous dentiform process, its point directed 

 inwards. 



Two females and a male of this large and handsome 

 Ctenus were taken at Sarawak by Mr. C. H. Hose, while a 

 male was also taken in Borneo by Dr. Kiikentlial. This 

 species, though larger, closely resembles in general appear- 



Ann. S Mag. N. Hist. Ser. 6. Vol. xx. 24 



