474 BULLETIN MUSEUM Ol COMPARATIVE ZOOLOGY. 



terminal joint aa long ;i> i In- three preceding joints together Eyes larg 

 rather flat, situated in fronl of sides of li»:.« 1 a little anterior '•> middle. Thorax 

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

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

 notum much broader than long and broader than the epinotuxn. 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 -mall and thin, its upper border 

 broad and nearly straight when seen from behind. 



Smooth and shining. 



Rather strong erect white hairs present on clypeus and gaster. Pubescence 



fine and moderately abundant on head and appendages. 

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



Yiti l.e\ u: Su\ a. 



Described from three workers. 



Plagiolepis madavishi Wheeler from the Society [slands (Moon 

 is close toforeli 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. 118, Q . 

 Abundant in all localities visited. 



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



Worker. Length 1.75-2 mm. 



Head subquadrate, slightly longer than broad, 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 



