Pacific Island Spiders, V — Marples 
403 
it, Paro simoni Berland from Rapa, may actually 
be a linyphiid. The present specimen may have 
been accidentally introduced to Swains Island 
from some other part of the world, as suggested 
above for the specimens from the Line Islands. 
As the island is not so isolated, and the other 
three species are found also in Samoa, the 
present specimen is described as Swainsai armata 
gen. et sp. nov. 
Swainsia armata gen. et sp. nov. 
MALE: Swains Island. Length 3.72 mm. Gen- 
eral color pale brown, the chelicerae and cepha- 
lic part of the carapace being darker, the abdo- 
men lighter. Black around the eyes and between 
AME and LE. 
Carapace: Length 1.87 mm, breadth 1.38 mm. 
Cephalic part parallel-sided, posterior part broad 
and rounded in outline, widest opposite legs II. 
Thoracic groove longitudinal. 
Eyes: Eight. From above, both rows recurved. 
Ratios of the diameters of the eyes and of their 
distances apart: AM, 112; AL, 147; PM, 113; 
PL, 131; AM-AM, 113; AM-AL, 84; AM-PM, 
97; PM-PM, 188; PM-PL, 135; L-L, 62; cly- 
peus 148. Breadth of eye-group 0.60 mm. 
Chelicerae: With boss. Strong and geniculate 
at the base with a posterior swelling also. 
Groove oblique and somewhat concave, espe- 
cially the promargin. Ventral end of the pro- 
margin with two large conjoined teeth and one 
small one. Retromargin with a row of eight 
teeth decreasing in size from the base of the 
fang. 
Maxillae: Rather long, slightly converging, 
pointed in front. 
Lip: Free, as wide as long and rounded an- 
teriorly. About half the length of the maxillae. 
Sternum: Length 0.89 mm, breadth 0.94 mm. 
Convex, almost circular but truncated anteriorly. 
Palp: Tibia with a large rounded distally 
directed lobe on the retrolateral side and a very 
large pointed process on the prolateral side, 
curving dorsally. Cymbium with a rounded 
swollen body and slender distal extremity. As 
in Figure 2. 
Legs: 
I IV 
II 
Ill 
Palp 
3.71 3.41 
3.38 
2.94 
1.58 
Patella 
and 
Femur 
T ibia M etatarsus 
Tarsus 
Total 
Palp 1.08 
1.07 
0.82 
2.97 
I 1.75 
2.27 
1.48 
0.88 
6.38 
II 1.71 
2.25 
1.57 
0.89 
6.42 
III 1.59 
1.73 
1.36 
0.83 
5.51 
IV 1.91 
2.29 
1.96 
0.79 
6.95 
Tibial Index 
I 14.5 
Tibial Index IV 
10.8 
Legs slender 
and with 
slender 
spines. 
Three 
claws, the dorsal similar with 12 long pectina- 
tions, the ventral with 
three small ones. 
Tarsi 
Fig. 2. Swainsia armata. Ventral, dorsal, and retrolateral views of the male palp. 
