344 Mr. F. O. P. Cambridge on the 



Pedipalp. Tibia three times as long as broad (excUiding 

 width of process). On outer side at apex is a stout bifid 

 spur, its outer limb shorter and sharplj conical, the inner 

 branch a little longer, dilate, and squarely truncate at apex. 

 Tarsus two and a halt times as long as broad, produced on 

 outer side at base into a short, straight, compressed conical 

 spur, its apex directed outwards. Area of palpal organs small, 

 oval. Central lobe simple, curved, twice as long as broad, 

 not produced at base. Unca siout, curving over the apex of 

 central lobe, its apex grooved on outer surface. Beneath 

 apex of unca lies a small pale membranous sheath, which is 

 present in some form or other in numerous species. 



$ . — Structure. Similar to that of the male, except that 

 the carapace is less gibbous at base, the lateral anterior 

 eyes are rather more removed from the central posteriors, 

 and the spinulation of the legs is different. Tibiai i. and ii. 

 5 pairs beneath ; no laterals and none above. Protarsi i. and 

 ii. with 3 pairs beneath ; no laterals and none above. 

 Patellge i. and ii. without spines, iii. and iv. with one lateral 

 spine on each side. Tarsi of all four pairs distinctly and 

 thickly scopulate -, protarsi i. and ii. only scopulate. 



Tarsal claws 2. 



Vulva a little longer than broad, globular ovate, convex 

 and plane above (without central depression or furrow), with 

 black coriaceous margins ; on each side of lateral margins, 

 just behind tlie centre, lies a small, stout, conical spur, curving 

 upwards and backwards, its apex well separated from margin 

 of vulva. 



The species Ilosei, sarawakensisj borneensis, and ceyhnensis 

 are all approximately similar to this form in general cha- 

 racters, so that there is no need for a tedious repetition of 

 them. Floweri and trabifer^ however, present characters in 

 common which are somewhat different; while those of den- 

 ticulatus are different in some respects from either of these 

 two forms. 



I strongly suspect that it was on a male of either Floweri 

 or trahifer that L. Koch based his genus Leptoctenus, but 

 am not yet in a position to give a reliable opinion. The 

 presence of the scopula might easily be overlooked, and it 

 seems by the figure that in Koch's Leptoctenus there are 

 five pairs of subtibial spines. The form of the labium and 

 maxillaj, of which Koch gives figures, precludes the idea that 

 Simon's L. denticulatus is congeneric with it. 



A male and female of this species, recorded from Ceylon, 

 were found in the Keyserling collection in the Natural 

 History Museum, South Kensington. 



