MANN: ANTS OF THE FIJI ISLANDS. 449 



oarinae short and curved, thoir Icjbos moderately elevated and rounded. Eyes 

 rather small, situated at anterior third of sides of head. Antennae stout, 12- 

 jointed; club elongate, 3-jointed, shorter than remainder of funiculus. Thorax 

 Ayithout sutures, narrower than head, broad in front narrowed behind, humeri 

 j)rolonged and annulate, inferior angles broadly rounded, dorsal surface flat. 

 Epinotum with two pairs of spines at sides of basal portion; declivity distinctly 

 broader than base and flat, margined laterally. Petiole short and thick, sub- 

 quadrate, with two small, rounded projections beneath. Postpetiole broad 

 and short, strongly margined anteriorly. Caster very short and broad, widest 

 behind middle of basal segment. Sting not visible. Anterior tibiae with a 

 lai-ge and very strongly pectinate spine; middle and posterior tiliiae without 

 spurs; claws simple. Hairs long and very fine. Sculpture coarse. 

 Genotji^e. — Archaenmiirmcx cacabmi, sp. nov. 



A distinct genus, which may l)est be referred to a new tribe, Archaeo- 

 myrniecini, between the Myrinecini and the IVIeranophni, (Hstinouished 

 by the shape of the head, with its margined lateral inferior border, 

 lobed cLypeus, absence of antennal scrobes, the stout, flat, triangular, 

 sutureless thorax, the armature of epinotmn, the broad, flat declivity, 

 the short, thick, non-pedunculate petiole and the short and broad 

 gaster. 



37. Archaeomyrmex cac.\bau, sp. nov. Fig. 17. 



Worker. Length 3.75 mm. 



Head broader than long, in profile convex, sides arcuate, posterior corners 

 rounded and rather prominent; occipital border straight at middle and round- 

 ing at sides, with an elevated margin in front extending straight and trans- 

 versely across the head. Mandibles stout, the basal border enlarged apically, 

 blades armed ^\'ith two large stout triangular teeth at apex and a .series of 

 seven broad, rather tuberculate teeth along the basal three fourths. Middle 

 of clypeus in the form of a concave lobe, broader than long and margined at 

 sides, the margins terminating as broadly truncate projections; anterior 

 margin concave, with a large very blunt tooth at middle, the latter minutely 

 excised at tip. Erontal carinae short, little elevated in front, curving and 

 forming an acute posterior margin to the antennal fossae. Antennal scapes 

 nearly attaining occipital angles, gradually thickened apically; first funicular 

 joint thicker than the second and a little longer than broad, second joint nmch 

 shorter than the third, joints 3-8 subequal in width and transverse, gradually 

 increasing in length toward apex, joints 9-10 longer than broad and together 

 distinctly shorter than the terminal joint. Eyes small (composed of about 

 thirty distinct facets), situated at anterior third of sides of head. Thorax 

 broad, without sutures, front of pronotum narrowly margined, concave at 



