MANN: ANTS OF THK FIJI ISLANDS. 4()7 



Fonair (deiilated). Leii^-th 3.10 mm. 



Closely resembling the worker, with the usual sexual differences. 



Viti Levu: Nadari^'atu. 



Described from workers and a female taken in a small colony in 

 rotten wood. 



This species resembles fcae from Lower Burmah in its large size, 

 and slender form, the narrow head, which is not angulate in front or 

 impressed at vertex and in the small size of the inner mandil)ular tooth. 

 The head of feae is somewhat broader and the sculpture entirely dift'er- 

 ent, the disc of postpetiole is smooth and shining, the epinotal spines 

 are much more slender. 



Keij. 



1. Mandibles short, with distinct basal and apical margins, the latter with 

 numerous fine teeth. Antennal scrobes large and broad, containing the entire 

 antennae. Prothorax margined ntiensis Mann 



Mandibles linear, with three apical teeth. Antennal scrobes less developed. 

 Prothorax not margined 2 



2. Large species (3-5 mm.). Dark in color 3 



Small species (1-2 mm.). Light in color 4 



3. Head slender, gradually narrowed anteriorly, sides not constricted at 

 eyes, cheeks parallel. Basal mandibular tooth short. Epinotal spines short. 

 Peduncle of petiole shorter than node wheelcri Mann 



Head much broadened behind, strongly constricted at eyes; cheeks convex. 

 Basal mandibular tooth as long as terminal teeth. Epinotal spines long. 

 Peduncle of petiole longer than node nidifex Mann 



4. Occipital border shallowly concave scelestus Mann 



Occipital border deeply concave 5 



5. Mandibles longer, slender, of subequal thickness. Petiolar node 

 coarsely ])unctate and opaque above and with strongly developed spongiform 

 hairs godeffroyi Mayr 



Mandibles shorter, thicker, more arcuate. Petiolar node smooth shining 

 above and with less developed spongiform hairs jepsoni Mann 



54. Rhopalothrix (Rhopalothrix) elegans, sp. nov. Fig. 25. 



Worker. Length 3.75-4.25 mm. 



Head, distinctly longer than broad, its transverse diameter between eyes 

 about equal to the width at anterior border; vertex strongly impressed at 

 sides so that the occipital corners stand out as large lobes with margin rounded 

 at front half, then concave and with the posterior angles narrowly rounded; 



