MANN: ANTS OF THE FIJI ISLANDS, 



475 



middle of anterior border. Antennal scapes surpassing occipital corners by a 

 little less than half their length. Thorax stout. Mesonotum flat, but little 

 longer than broad. Mesoepinotal impression broad and deep. Basal portion 

 of epinotum convex, broad, about as long 

 as declivity and broadly rounding into it. 

 Node rather thick, cuneiform, moderately 

 inclined forward. 



Shining. Mandibles sparseh' punctate. 

 Front and vertex with coarse, setigerous 

 punctures. Pilosity arranged as follows : — 

 long and abundant on head and gaster 

 and mixed with shorter, fine, sparse, semi- 

 erect hairs. Prothorax with four pairs and 

 mesothorax with two pairs of coarse hairs, 

 the outer pairs on the pronotum shorter 

 than the inner ones; short, erect, and fine 

 hairs sparseh- distributed on appendages. 



Color browni.sh yellow, with the tips of 

 antennae paler and the gaster somewhat 

 infuscated. 



Male. Length 1.80 mm. 



Fig. 28. — Prenolepis (Nylanderia) 

 vitiensis Mann. Male. Genitalia. 



Head, excluding eyes, distinctlj' longer than broad, sides in front of eyes 

 convergent. Eyes about three times as long as their distance to base of 

 mandibles. Chijeus convex, its anterior border very broadh" and shallowly 

 concave. Mandibles well developed, their blades distinctly denticulate. 

 Antennal scapes surpassing occipital corners by about half their length. 

 Thorax robust, broadest in front of wing insertions. Metanotum in profile 

 sloping above, nearly straight, with the base a little longer than the declivous 

 portion. Petiole low, rather thickly cuneiform, rounded above. 



Genitalia with squamulae a little shorter than the stipes, nearly straight 

 at tips; stipes elongate, curved, narrowly rounded at tips; volsellae broadly 

 spear-head shaped; sagittae slender, with the ends narrowly rounded. 



Kadavu : Vmiisea. 



The workers resemble some small Tongan specimens of P. invidida 

 in the U. S. N. M. collection (ex Coll. Mayr.) but is readily distin- 

 guished by the difference in the hairs on the antennal scapes, \vhich in 

 vii'idula are very coarse and erect and in vitiensis fine and silky. The 

 genitalia of the male is somewhat similar to that of P. caledonica Forel 

 as figured by Emery, with the volsellae broader basally and more 

 narrowed at tips, though because of the arrangement of the thoracic 

 macrochaetae in the worker, vitiensis belongs in the vividida group as 

 defined by Emery (Nova Caledonia. Zool., 1914, 1, p. 422). Type. — ■ 

 M. C. Z.' 8,717. ' 



