400 
PACIFIC SCIENCE, Vol. XVIII, October 1964 
TABLE 1 
Distribution of Spiders in the Line Islands 
HOWLAND 
BAKER 
CANTON 
JARVIS 
PALMYRA FANNING 
Eilistata bakeri 
X 
Scytodes striatipes 
X 
X 
X 
Clubionid 
Heteropoda sp 
X 
X 
Menemerus bivittatus 
X 
Plexippus payculli 
X 
X 
X 
X 
Salticid 
Thorellia ensifera 
X 
X 
Lycosa tongatabuensis 
Latrodectes geometricus 
Theridiid 
X 
X 
X 
x 
Linyphiid 
Epeira theisi 
X 
X 
X 
X 
Epeirid 
Epeirid 
X 
X 
from an incomplete specimen, is here described 
fully. Thirty-five species are recorded from 
Savaii and 34 from Tutuila, these being listed 
below, and the total for the Samoan Group is 
now 136. 
SOCIETY ISLANDS 
Forty species have been recorded from the 
Society Islands. The present collection includes 
12 species, mostly from Tahiti, and two of 
them are new records for the group. These are 
both clubionids, Australaena histricina Berland, 
previously recorded from Rapa, and Chiracanth- 
ium gilvum L. Koch, previously recorded from 
New Caledonia and Samoa. 
SWAINS ISLAND 
This is a small island situated between Samoa 
and the Tokelau Islands to the north. No spiders 
seem to have been recorded from it before, 
but the collection includes four species. Two 
of them are very widespread species, Thorellia 
ensifera Thorell and Epeira theisi Walckenaer. 
Ceruleocera ransfordi Marples, recorded from 
Upolu, Samoa, is surprising, as its habitat there 
is under stones in rather moist situations. The 
fourth species is an agelenid, described below 
as a new genus and species. 
TONGA 
New records are Ulohorus gibbosus L. Koch 
from Nukualofa, previously recorded from New 
Hebrides, Fiji, Samoa, and Tokelau, and Theri- 
dion albidum Berland from Vavau, previously 
recorded from Samoa. It had seemed curious 
that no uloborids were known from Tonga; 
this is the first of the genus. The total number 
of species for Tonga is now 51. 
TETRABLEMMIDAE 
T etrablemma samoensis n. sp. 
Malololelei Rd. Upolu, Samoa. Collected by 
E. C. Zimmerman vii-9-40. 
MALE: Length 1.16 mm. Bright chestnut 
brown, legs a little paler. 
CARAPACE: Length 0.52 mm, breadth 0.23 
mm. Outline from above pear-shaped, widest 
opposite leg II, rounded in front and behind. 
Profile rises steeply to the apex opposite leg I, 
where the eyes are situated. 
Eyes: Four, white, central area of the group 
black. Ratios of the diameters of the eyes and 
of their distances apart: AE, 65; PE, 56; A-A, 
0; A-P, 0; P-P, 40. Width of the eye-group 
0.09 mm; clypeus 0.25 mm. 
Chelicerae: Stout, with a large, anteriorly 
directed, upward-curving horn arising near the 
base. Ventral end of the retromargin of the 
groove with a large sharp angle. 
Maxillae: Sharply inclined inwards, the scapu- 
lae meeting in front of the lip. 
