MANN: ANTS OF THE BRITISH SOLOMON ISLANDS. 277 



Formicidae: Ponerinae. 



la. Cerapachys (Syscia) pusilla Emery, subsp. pawa, subsp. nov. 



A single worker found beneath a stone agrees with Emery's descrip- 

 tion of ixipuana from New Guinea, except that it is smaller and less 

 opaque and has the postpetiole distinctly longer than broad for which 

 reason I refer it to the closely related pusilla Emery, also from New 

 Guinea, which differs from papuana in the same characters. 



The subspecies pawa differs from pusilla only in sculpture. The 

 head is irregularly and coarsely punctate and rugose. The thorax is 

 shining and more regularly punctate and not rugose. 



The legs are shining. 



Ugi : Pawa. 



2. Cerapachys (Cerapachys) terricola, sp. nov. 



Worker. Length 3.5 mm. 



Head a third longer than broad, as broad in front as behind, with moderately 

 rounded sides, nearly rectangular occipital corners and feebly concave occipital 

 border. Mandibles short and stout, blades minutely denticulate. Frontal 

 lobes short, narrowly separated. Anterior border of clypeus almost straight. 

 Antennal scopes thick, club-shaped, extending more than half the distance to 



Fig. 1.- — Cerapachys (Cerapachys) terricola Mann. Worker. 



occipital corners; first flagellar joint as long as broad; joints 2-11 transverse; 

 apical joint as long as the six preceding joints and at the middle one and a half 

 times as thick as the penultimate. Eyes large, convex, located at sides of 

 head a little anterior to the middle. Thorax two and a half times longer than 

 broad; sides straight, anterior border evenly rounded and narrowly margined; 



