70 
PACIFIC SCIENCE, Vol. IX, January, 1955 
The Tonga Islands are an extensive group 
lying some 450 miles east of Fiji. They are 
very low islands, especially Tongatabu which 
has an area of about 100 square miles and a 
height of only 200 feet. Berland records 20 
species, and the present collection, from Ton- 
gatabu only, includes 15, bringing the total 
to 31 species. One appears to be new and is 
described here. 
Pitcairn Island does not belong to the same 
region as the others included here. It lies to 
the southeast of the Tuamotu Group, some 
1,500 miles east of the Cook Islands. It is 
small, with an area of 1,200 acres and a height 
of 1,000 feet. Berland records two species and 
the present collection adds four more. I am 
indebted to Mrs. O. Clark and her family for 
the collection. 
Measurements were made with a micro- 
meter eyepiece, converted to millimeters and 
given to the nearest second decimal place. 
The leg formula is written as the legs in order 
of length above the line and the leg indices 
below it. For example, 1 2 4 3 indicates that 
Leg I is the longest and Leg III is the shortest. 
The leg index is calculated by dividing the 
length of the leg by the length of the cara- 
pace. The tibial index, giving a measure of the 
stoutness of the leg, is calculated by dividing 
the combined lengths of the tibia and patella 
by the breadth of the proximal end of the 
patella. It is given for Legs I and IV in each 
case. These methods of measurement follow 
those of Petrunkevitch. Dimensions of the 
abdomen, though of course not precise, are 
given to indicate its approximate shape. 
LIST OF THE SPECIES RECORDED 
DICTYNIDAE 
Syrorisa mutnfordi Berland. Tokelau. 
ULOBORIDAE 
Uloborus geniculatus Olivier. Tokelau. 
Uloborus tenellus L. Koch. Tokelau. 
SCYTODIDAE 
Scytodes striatipes L. Koch. Tongatabu. 
Scytodes marmorata L. Koch. Tongatabu. 
OCHYROCERATIDAE 
Apiacera minuta Marples. Tokelau. 
PHOLCIDAE 
Pholcus ancoralis L. Koch. Rarotonga. 
Physocyclus globosus Taczanowski. Pukapuka. 
Smeringopus elongatus Vinson. Tokelau, Ton- 
gatabu, Pukapuka. 
CLUBIONIDAE 
Clubiona samoensis Berland. Rarotonga. 
Corinna sp. Pitcairn. 
SPARASSIDAE 
Heteropoda venatoria (Linn.). Niue, Pitcairn, 
Pukapuka, Rarotonga, Tokelau, Tonga- 
tabu. 
SALTICIDAE 
Bavia aericeps Simon. Pukapuka, Tokelau. 
Menemerus bivittatus Dufour. Tongatabu. 
Plexippus payculli Audouin. Tokelau. 
Sandalodes calvus Simon. Rarotonga. 
Ascyltus pterygodes (L. Koch). Niue, Tokelau, 
Tongatabu. 
Athamas whitmei Cambridge. Pukapuka, Ra- 
rotonga, Tokelau. 
Thorellia ensifera Thorell. Pukapuka, Raro- 
tonga, Tokelau. 
Hasarius albocircumdatus L. Koch. Tongatabu. 
Trite longipalpis n. sp. Tongatabu. 
Avarua satchelli gen. et sp. nov. Rarotonga. 
LYCOSIDAE 
Lycosa tongatabuensis Strand. Pukapuka. 
Lycosa sp. Tongatabu. 
THERIDIIDAE 
Conopistha samoensis (L. Koch). Tongatabu. 
Conopistha unimaculata Marples. Tongatabu, 
PNiue. 
