OF WASHINGTON. 21 
but the posterior lateral spines are larger and more recurved than in that 
species. 
FIG. 7. Giisteracantlia biolleyi. 
Two specimens from Cocos Island collected by Dr. Paul 
Biolley. 
Leucauge argyra Walckenaer. 
A few specimens of this common tropical spider. 
Leucauge nigriventris Keyserling. 
Taken by the Hopkins-Stanford Galapagos Expedition. It 
occurs also in northern South America and in the Galapagos 
Islands. 
Theridium species. 
A few specimens of a small species, with a short yellow abdo- 
men and a black cephalo thorax. Quite possibly it is new. 
Ctenus species. 
One immature specimen. 
Lycosa species. 
Several young specimens. 
PHALANGIDA. 
Pellobunus, new genus. 
Near Sterrhosoma Thorell, but separated therefrom by the slender legs, 
with fewer tarsal joints, and fewer spines on tibia of palpus, and by absence 
of claw to tarsus I. 
