344 Mr. F. O. P. Cambridge on the 
Pedipalp. Tibia three times as long as broad (excluding 
width of process). On outer side at apex is a stout bifid 
spur, its outer limb shorter and sharply conical, the inner 
branch a little longer, dilate, and squarely truncate at apex. 
Tarsus two and a half 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 stout, 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. ‘Tibiz i. and il. 
5 pairs beneath; no laterals and none above. Protarsi i. and 
il, with 3 pairs beneath ; no laterals and none above. 
Patelle i. and 11. without spines, iil, and iv. with one lateral 
spine on each side. ‘Tarsi of all four pairs distinctly and 
thickly scopulate ; protarsi i. and il. 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 the centre, lies a small, stout, conical spur, curving 
upwards and backwards, its apex well separated from margin 
of vulva. 
The species Lose’, sarawakensis, borneensis, and ceylonensis 
are all approximately similar to this form in general cha- 
racters, so that there is no need for a tedions repetition of 
them. Llowert and trabifer, however, present characters in 
common which are somewhat different; while those of den- 
ticu/atus are different in some respects from either of these 
two forms. 
I strongly suspect that it was on a male of either Plower¢ 
or trabifer 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 
maxilla, 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. 
