— ol — 
judging from Van Hasselt’s figure, not identical with valvularıs, but doubtless there are 
several forms, with the same character of vulva, very closely allied. 
Genus Acantheis Thor. 
Acantheis tridens sp. n. 
d. Colour. Carapace and abdomen dull yellow, thickly clothed with erimson and 
orange pubescence. Legs similarly clothed. Under surface pale straw-yellow. 
Carapce a little broader than long, strongly gibbous and abruptly incelined behind. 
Central and thoracie striae deeply marked. Eyes closely grouped (always more so in d sex 
in Üteninae); ocular quadrangle longer than broad, scarcely narrower in front, eyes sub- 
equal, posteriors half a diameter apart, anteriors scarcely half a diameter. Second row pro- 
curved, laterals very small, less than half centrals, half their diameter from the latter and 
the same from posterior laterals; posterior laterals slightly smaller than central posteriors. 
Clypeus equal to 1'/z diameters of central anteriors. 
Sternum as long as broad, cireular, emarginate opposite coxae, pointed behind. 
Labium one half longer than broad, more than half but less than two thirds the length 
of maxillae; the latter long, straight, attenuate at base, dilate at apex, obliquely truncate 
on inner apical margin. 
Mandibles. Lower margin of fang-groove with 5 teeth, upper with 3. Legs 4, 
1, 2, 3; femora with numerous spines; patellae I, II, III, IV with one spine on each side. 
Tibiae I and II with 2-2-2-2-2-2-2-2-2 long spines beneath (the last pair small, 
apical); 1-1-1-1 small lateral spines on each side, no dorsal spines. Protarsus I and II with 
2-2-2-2-2 long spines beneath (last pair not strietly apical); 1-1 spines on each side in basal 
third, no dorsal spines, 
Scopula present on tarsi of all four pairs; none visible on protarsi. Tarsal claws 
2 with 4 dentieles towards base. Claw tuft present. 
Pedipalp. Tibia four times as long as broad, external apical process short, small, 
parallel-sided, slightly curved, trifid at apex, forming three distinet, short, equal teeth. 
Measurements in millimetres. Total length 12, length of carapace 5.25, width 
4.5, length omle]ee732:9000 22373070 32322601 487 38:5: 
Loc. Baram River, Borneo. A single male example. 
UK 
