474 bulletin: museum of comparative zoology. 



terminal joint as long as the three preceding joints together. Eyes large, 

 rather flat, situated in front of sides of head a little anterior to middle. Thorax 

 from above less than three times as long as broad, shaped as in mactavishi 

 Wheeler, like an hour-glass, with the mesothorax strongly constricted. Pro- 

 notum much broader than long and broader than the epinotum. Mesonotum 

 transversely oval. Epinotum broadened and truncated behind; in profile 

 with base and declivity of equal length and broadly rounding into each other, 

 the lateral margins bituberculate. Petiole small and thin, its upper border 

 broad and nearly straight when seen from behind. 



Smooth and shining. 



Rather .strong erect white hairs present on clj-peus and gaster. Pubescence 

 fine and moderately abundant on head and appendages. 



Honey-yellow, with the posterior half of gaster infuscated. 



Viti Levu: Suva. 



Described from three workers. 



Plagiolepis mactavishi Wheeler from the Society Islands (Moorea), 

 is close to foreli but has the posterior border of head distinctly excised 

 and the thorax more elongate. 



61. Plagiolepis longipes (Jerdon). 

 Formica longipes Jerd., Madras journ. litt. & sci., 1851, 17, p. 122, ^ . 



Abundant throughout the islands, especially in the cultivated dis- 

 tricts. 



Some Nautilus shells which I placed in my room at Vunisea, after a 

 week were tenanted by a populous colony of this ant, including larvae 

 and pupae. 



62. Prenolepis (Prenolepis) longicornis (Latreille). 

 Formica longicornis Latr., Hist. nat. fourmis, 1802, p. 113, ^ . 

 Abundant in all localities visited. 



63. Prenolepis (Nylanderia) vitiensis, sp. nqv. Fig. 28. 



Worker. Length 1.75-2 mm. 



Head subqujadrate, slightly longer than Inroad, sides moderately convex, 

 occipital border narrowly excavated at middle. Mandibles 6-dentate, the 

 basal tooth conspicuously stouter than the others. Clypeus convex, twice as 

 broad as long, obtusely carinate at middle, feebly and narrowly concave at 



