470 bulletin: museum of comparative zoology. 



longitudinal diameter one and two thirds times as long as the distance from 

 anterior borders to base of mandibles. Thorax elongate. Mesothorax very 

 slightly convex above. Scutellum about as long as broad, feebly rounded. 

 Epinotum in profile short and convex, the base broadly rounding into the 

 declivity. Petiole shorter and thicker than in worker. Gaster long and 

 slender. 



Moderately shining. Head densely punctate and opaque as in worker. 

 Thorax and abdomen with dense, but minute punctures. 



Erect hairs short and sparse. Very fine appressed pubescence on head, 

 body, and legs, longest on gaster. 



Color black. Funiculi and mandibles dark red-brown; tarsi brown. Wings 

 clear, with pale brown veins and stigma. 



Male. Length 1.75 mm. 



Head a little broader than long, broadly rounded behind. Mandibles well 

 developed, pointed apically, finely denticulate. Eyes a little more than half 

 as long as head. Antennae short and thick, decreasing in thickness toward 

 apex, 13-jointed; scapes slightly longer and more slender than first funicular 

 joint; funicular joints 2-11 subequal, a little longer than broad; terminal 

 joint less than twice as long as penultimate. Thorax robust. Mesonotum 

 moderately convex. Scutellum strongly convex. Basal and declivous por- 

 tions of epinotum subequal and rounding into each other. Node thickly 

 wedge-shaped, broad and concave above and obliquely excavate behind, with 

 narrow anterior and lateral margins and prominent angulate corners. 



Shining. Densely, shallowly punctate. Pilosity short and exceedingly 

 sparse. 



Color black; gaster and legs dark reddish brown. Wings hyahne, veins 

 and stigma pale. 



Viti Levu: Nadarivatu. 



Described from a large series of workers from colonies in Myrrae- 

 codia bulbs. A clavigerid beetle is harbored by this ant. 



This species resembles glaber from Australia and its subspecies 

 someri Forel from New Caledonia, but is distinct in the shape of the 

 head which is much shorter and with more convex sides. Type. — 

 M. C. Z. 8,712. 



56. Iridomyrmex nagasau, sp. nov. Fig. 27. 

 Worker. Length 3-5 mm. 



Head longer than broad, narrowed in front and behind, sides convex, occi- 

 pital corners rather narrowly rounded, border concave at middle. Maadibles 

 with six stout triangular teeth on apical two thirds of blades, behind these, on 



