Pacific Spiders, IV — Marples 
387 
margin. Dorsal surface near the base of the fang 
with a stridulating organ of 7 ridges. Strigil at 
the proximal end of the tarsal tibia. Five pro- 
marginal teeth, the next but one to the ventral 
end being the largest; 3 somewhat larger retro- 
marginal teeth. 
Maxilla: Large and rounded, converging, trun- 
cated anteriorly with only a slight anteromedian 
scopula. Posterolaterally adjacent to coxa I is a 
rounded dark elevation. 
Lip : Small, rounded, broader than long. 
Sternum: Length, 0.56 mm., breadth, 0.59 
mm. Convex. Hollows for the bases of the maxil- 
lae and legs. Extending between the hind legs. 
Palp: Tibia drawn out into a sharp dark dorsal 
process extending distally beside the base of the 
tarsus, below it a lateral convexity. Three dorsal 
trichobothria. Details as in figure. 
Legs: IV 
i 
II 
III 
Palp 
2.99 
2.86 
2.74 
2.25 
1.27 
PATELLA 
AND 
META- 
FEMUR 
TIBIA 
TARSUS 
TARSUS 
TOTAL 
Palp 0.56 
0.41 
— • 
0.39 
1.36 
1 0.62 
1.14 
0.78 
0.50 
3.05 
II 0.79 
0.97 
0.71 
0.25 
2.73 
III 0.71 
0.74 
0.58 
0.38 
2.41 
IV 0.91 
1.06 
0.81 
0.41 
3.19 
Tibial Index I 9.0 
Tibial Index IV 9.0 
Three claws, paired ones with 6 pectinations 
in a single row, median claw with 1. Spines few 
and inconspicuous. Tibiae with 2 dorsal spines 
except IV which has one. One on each patella. 
The femora have a double row of stout hairs or 
fine spines. 
‘Trichobothria: 6 in 2 rows on the tibiae and 
1 on the metatarsi, including metatarsus IV. 
Abdomen: Length, 1.11 mm., breadth, 0.73 
mm. Oval, slightly overhanging the waist. Spin- 
nerets posteroventral, 6, the anterior much the 
largest. Anal tubercle and colulus small. Geni- 
tal fold conspicuous. Posterior spiracles appear 
paired and close to the spinnerets. 
This species, on the evidence of the converg- 
ing maxillae, the single spine on tibia IV, and 
Fig. 2. Aitutakia armata, male, a, Sternum and 
maxillae; b, prolateral view of left chelicera; c, retro- 
lateral view of right palp. 
the single trichobothrium on metatarsus IV, 
would seem to belong to the micryphantid as- 
semblage. It is remarkable for the apophyses on 
the chelicerae and the swelling on the maxillae 
which distinguish it from the other species in 
the region. As its true generic position can only 
be determined by a specialist on the Linyphiidae, 
it is provisionally placed in a new genus. 
TETRAGNATHIDAE 
Dyschiriognatha oceanica Berland 
AITUTAKI: 5 Females. 
Dyschiriognatha upoluensis Marples 
NIUE: 1 Male. Swept in shrubs at night. Smaller 
than Samoan specimen. 
AITUTAKI: 4 Males. 
Leucauge tuberculata Keyserling 
NIUE: 15 Females, 5 males, 43 imm. 
AITUTAKI: 2 Females and 2 imm., 2 males imm. 
