MANN: ANTS OF THE BRITISH SOLOMON ISLANDS. 333 



Form slender. Head much longer than broad, sides subparallel, posterior 

 border feebly emarginatc. Ocelli prominent. Eyes large and rather flat. 

 Thorax two and a half times as long as broad, broadest at wing insertions, 

 flattened above. Petiolar node shorter and thicker than in soldier and not 

 emarginate above. Postpetiole slightly broader than petiole, transversely 

 oval. Gaster three times as long as broad. 



Shining. Head punctate similarly to that of soldier. Epinotum rugulose. 

 Petiolar node densely and shallowly punctate, the remainder wnth sparse, fine 

 punctation. 



Pilosity of head as in soldier, of thorax and abdomen more abundant, erect 

 on thorax and suberect on abdomen. 



Color fuscoferruginous; appendages lighter. Wings hyaline, veins brown. 



Male. Length 2.5 mm. 



Head, excluding eyes, much longer than broad, concave at occipital border. 

 Mandibles well developed, 5-dentate. Clj'peus flattened at middle. An- 

 tennae (broken in specimens before me) with scape twice as long as first 

 funicular joint, joints three to ten cylindrical, each as long as the eye. Eyes 

 very large and convex. OcelU large. Thorax twice as long as its width at 

 wing insertions. Scutellmn shghtly convex. Petiole about twice as long as 

 broad, node low and rounded. Postpetiole barely broader than petiole and 

 as broad as long, narrowed in front. Genitalia prominent. 



Shining. Head very finely rugosely striolate, thorax and abdomen very 

 minutely punctate; postpetiole rather denselj^ so. Hairs on head and thorax 

 short, stiff, and erect; on gaster sUky and recumbent. Funicular joints with 

 a dense covering of short, white hairs. 



Ferruginous; head epinotum, petiole, postpetiole, and first gastric segment 

 fuscous. 



Wings hj^aline, with dense fuscous hairs, veins brown. 



San Cristoval: Wai-ai. 



Described from a series taken from several colonies in rotten wood. 

 The worker resembles that of 0. subreptor Emery of New Guinea 

 which is known only from that phase, but has verj' pronounced epino- 

 tal spines, while in subreptor the sides are merely obtusely angulate. 

 Type.— M.C.Z. 9,171. 



64a. PoDOMYRMA BASALis Smith, subsp. SALOMO, subsp. nov. 

 Worker. Length 5.5-6.5 mm. 



In general appearance very similar to the typical Australian form, but differ- 

 ing in the following characters : — 



The striae of the head, instead of being strong and uniform, are very delicate, 



