MANN : ANTS OF THE BRITISH SOLOMON ISLANDS. 339 



in front, smooth behind. Rest of body minutely punctate and very shining. 

 Everywhere with sparse, scattered, rather stiff, suberect hairs. Pile yel- 

 lowish. 



Santa Cruz: Graciosa Bay. 



Only one worker was found. The elevated sides of the mesothorax 

 and the absence of the median tooth on anterior border of clypeus 

 is characteristic of this distinct species. 



67. PRISTOMYRMEX OBESUS, Sp. nOV. 



JVorkcr. Length 2 mm. 



Head as broad as long, with convex sides, broadly rounded corners and 

 straight occipital border. Clypeus flat in middle; anterior border with three 

 triangular teeth. Mandibles stout, their basal border dentate at middle; 

 blades strongly 3-dentate. Eyes little convex, located at middle of sides of 

 head. Antennal scrobes broad and shallow, extending half the distance from 

 eyes to occipital corners. Antennae short; scapes somewhat thickened in 

 front of middle and at apex, extending five sixths the distance to occipital 

 corners; first funicular joint much broader and nearly twice as long as the 

 second; joints two to seven moderately transverse; eight and nine a little 

 longer than broad; terminal joint two and one half times as long as broad, 

 broadest in middle and acuminate anieriorly. Promesonotum with a trans- 

 verse impression in front which is joined at middle by a deeper longitudinal 

 impression; anterior border thinly margined, sides more roundly margined 

 and bluntly bituberculate ; inferior corners evenly rounded. Epinotum with 

 subequal base and declivity, the base transversely carinate at middle; de- 

 clivity concave, margined at sides; spines triangular, acute and nearly as long 

 as declivity. Peduncle of petiole nearly as long as the node; node in profile 

 deeper than long and highest in front, with concave anterior and posterior 

 surfaces and slightly convex dorsum; from above, twice as long as broad, 

 sides straight. Postpetiole from above, as broad as long; in profile, deeper 

 than long and rounded above. 



Shining. Mandibles with sparse and moderately strong punctures. Head, 

 except clypeus and antennal scrobes which are smooth and shining, coarsely, 

 foveolately punctate. Thorax punctate similarly to head but much more 

 sparsely. Epinotum, petiole, postpetiole, and gaster very shining, with a few 

 shallow punctures. 



Legs and antennae finely punctate. Every where with scattered, fine, erect 

 hairs. 



Color ferruginous. 



Female (dealated). Length 2.5 mm. 



