MANN: INTO OF THE I m [BLANDB. 469 



55. [ridomtrmex bororis, sp. nov. Pig. 26. 

 Worker. Length 1 .7.") 2 nun. 



I lend about one (if i li longer than broad, moderate^ narrowed In front, with 

 convex sides, broadly rounded posterior corners and nearly Btraighl occipital 

 border. Mandibles thick, their blades with six small triangular teeth. Cly- 



peus roundly elevated at middle of basal half, very shallowly concave at mid- 

 dle of anterior border, Frontal carinae extending a little beyond anterior 

 border of eyes. Antenna] scapes barely surpassing occipital corners] funicu- 

 lus stout, first and second joints nearly twice ;is long as broad, remaining 

 joints, excepl the terminal, slightly Longer than broad, terminal joint not quite 

 as Long as the two preceding joints together. Byes large, feebly convex, 



situated in front of sides a little before the middle. Thorax robust. Pro- 

 notum broader than Long, strongly rounded at sides, rather flat above. Meso- 



thorax longer than broad, little convex above. Mesoepinotal impression very 

 Btrong. Base of epinotum slightly longer than broad, moderately convex, 

 much shorter than the declivity over which the thick posterior border projects; 

 declivity in profile concave. Node very broad and thin, as broad basally as 

 :ii lop, narrowly rounded above; seen from the front, the dorsal surface is 

 broadly rounded. Gaster short, and broad. 



Fig. 26. — Iridomyrmex sorosis Mann. Worker. Lateral view of thorax and petiole. 



Opaque, except the gaster, which in certain lights has a strong violaceous 

 reflection. Mandibles densely punctate at basal half, more sparsely apically. 

 Head, thorax, and epinotum very densely punctate; petiole, gaster, and legs 

 densely but much more finely punctate. 



Clypeus with a few erect hairs; gaster with a covering of microscopic re- 

 cumbent pubescence. 



Color black, except for the violet reflections on gaster, and the basal half of 

 snipes and the funiculi which are reddish brown and the tarsi, which are 

 yellowish brown. 



Female. Length 4 mm. 



Head similar to that of worker. Antenna! scapes not quite attaining 

 occipital corners. Eyes situated at sides of front anterior to middle; their 



