1902. } SPIDERS FROM BORNEO AND SINGAPORE, 277 
the base.  Elytra very closely rugulose-punctate, gradually 
widening from the base backwards , broadly rounded and pughtly 
sinuate at the apex, with a short spine on each at the suture 
NorHoPEvs INTERMEDIUS, sp. n. (Plate XIX. fig. 21, 3.) 
Corpore supra, capite toto, pedibus antennisque fulvis, his versus 
apicem infuscatis ; thovace subtus et abdomine nigro-cyaneis, 
sed prosterno mesosternoque medio, maculis duabus metasternt 
et segmento primo abdominis fulvis, hoe argenteo-sericeo ; 
elytris (quod attinet ad hoc genus) perelongatis, apicem 
abdominis fere attingentibus. 
Long. 27; lat. (pone humeros) 7 mm. 
Hab. Savawak, Mt. Penrissen, May 1899. One male example ; 
in the Sarawak Museum, Kuching. 
Head, antenne (except the last four joints, which are brownish), 
disk of prothorax, and elytra tawny red; body underneath bluish 
black, but with the prosternum, mesosternum, a spot on each side 
of the metasternum, and the whole of the first abdominal seg- 
ment tawny, the latter being covered with a silky pubescence 
giving silvery reflexions in certain lights. The elytra, though 
unusually long for this genus, extending nearly to the apex of 
the abdomen, are consider: ably ed from a little behind the 
shoulders, and each in its posterior half is scarcely half as broad 
as itis at the base. The hind tibiw of the male are thickened 
and subeylindrical, narrowed towards the base and very slightly 
also towards the distal end. 
This species comes nearest in structural characters to Aphro- 
disiwm tibiale Rits., from Assain, but differs from it in having 
the elytra still more attenuated behind and the front of the head 
narrower.  Ritsema placed his species in Aphrodisium as an 
aberrant member of that genus; but considering the reduction 
in the size of the elytra and the ‘peculiar form of the male hind 
tibie, I believe it to be better placed in Mothopeus, though 
undoubtedly showing strong affinities with Aphrodisiwm. His 
species and the one here described are both extr emely interesting 
as showing the gradual progress of that modification lending to 
the very shortened elytra and the strongly mimetic forms charac- 
teristic of the genus Vothopeus. 
PSEBENA, gen. nov. 
Head short, as broad as the prothorax; eyes finely facetted, 
deeply emarginate, with the lower lobes rounded, the upper very 
narrow; palpi short and slender. Antenne (?) a little longer 
than the body, slender, filiform; 3rd, 4th, and 5th joints sub- 
equal to one another, each twice as long asthe 1st; 6th distinctly 
shorter than the 5th ; the succeeding joints evadually dimin- 
ishing in length. Prothorax subcylindrical, as broad as it is 
long. Elytra short, squamiform, not re aching beyond the apex 
of the first Ehdominal sternite. Prosternum narrowed behind ; 
front coxe prominent, their acetabula angulate outwards and 
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