Pacific Island Spiders — Marples 
73 
those from Rarotonga are more strongly 
developed. 
Hasarius albocircumdatus (L. Koch) 
lcT imm. Tongatabu. This specimen may be- 
long to this species, already recorded from 
Tahiti. 
Avarua gen. nov. 
Carapace flat above, thoracic groove small, 
situated halfway between the level of PLE 
and the posterior margin. Leg I stoutest, 3 
pairs of ventral spines on metatarsi I and II 
and on tibia I. Tooth on the retromargin of 
the cheliceral groove deeply serrated. 
The genus is similar to Efate Berland but 
differs in the position of the thoracic groove, 
the divided instead of entire retrolateral tooth 
and the arrangement of spines. 
Type species: A. satchelli n. sp. It is named 
after the place in Rarotonga where this species 
was collected. 
Avarua satchelli n. sp. 
Fig. 1 
lcf. Avarua, Rarotonga. Collected by Dr. G. 
H. Satchell, 1949. 
male. Length 5.40 mm. Carapace, sternum, 
chelicerae, palps, and first legs yellowish 
brown. Carapace dark in the ocular area and 
round the edge, palps with a dark streak on 
the dorsal side of the two distal joints. Ab- 
domen and other legs paler. Dorsal side of 
abdomen browner towards the anterior end 
and grey near the spinnerets, three pairs of 
lateral markings, ventral side pale. 
Carapace: Length 1.60 mm., breadth 1.35 
mm. Flat on top, especially the ocular area 
and back as far as the thoracic groove which 
is minute, longitudinal and situated halfway 
between a line joining the PLE and the pos- 
terior end of the carapace. Carapace slightly 
widest at the level of the second legs. 
Eyes: Ratio of eyes AM:PL:AL:PM = 224: 
106:102:39- Ratio of their distances apart 
AM-AM, 20; PM-PM, 585; PL-PL, 540; 
Fig. 1. Avarua satchelli gen. et sp. nov., male. 
a , Retrolateral view of left palp; b , ventral view of left 
palp; c, ventral view of mouth parts. 
AL-PM, 158; PM-PL, 150. Breadth of an- 
terior row of eyes 1.12 mm. 
Chelicerae: Fissidentate. A large blade on 
the retromargin of the groove almost divided 
into 3 teeth, the dorsal one largest and with 
a bifurcate point. Two teeth at the ventral end 
of the promargin. 
Maxillae: Long, the distal part much wider 
than the rest, its median corner with a scopula, 
its outer one forming a rounded lobe with a 
dark margin. 
Lip: Longer than broad. Notched at the tip 
and on each side near the base for the bases 
of the maxillae. 
Sternum: Length 0.99 mm., breadth 0.59 
