821 



instead of red, without metallic reflections. The head and 

 thorax are beautiful metallic green, the gaster black, the 

 mesopleurae and fore coxae metallic-purple as in the var. 

 smaragdiniLS . 



Seven workers, four from the Everard Range and three 

 from Flat Rock Hole in the Musgrave Ranges. 



30. POLYRHACHIS (CaMPOMYRMa) LONGIPES, U. Sp. 

 Pis. Ixv., figs. 1 and 2, and Ixvi., fig. 10. 



Worker. — Length, 9-10 mm. 



Head subrectangular, excluding the mandibles, a little 

 broader behind than in front, with straight sides and rather 

 sharp, distinctly marginate posterior corners, the occipital 

 region convex in the middle, the frontal region convex, and 

 the vertex rather flat. Eyes large and convex, situated a 

 distance about equal to their longest diameter from the pos- 

 terior corners of the head. Mandibles with moderately convex 

 external and 5 -toothed apical borders. Clypeus distinctly 

 carinate, produced in the middle as a rounded lobe, bearing 

 at its edge a row of regular, fine, acute teeth, its sides broadly 

 excised. Frontal area small, triangular, impressed ; frontal 

 groove distinct ; frontal carinae closely approximated in front, 

 gradually diverging behind, nearly straight. Antennae very 

 long and slender, scapes reaching fully half their length 

 beyond the posterior border of the head ; first funicular joint 

 more than five times as long as broad, remaining joints grow- 

 ing successively shorter. Thorax long, its dorsal surface 

 flattened and but slightly convex in profile, very sharply 

 marginate on the sides, so that the pleurae are slightly con- 

 cave, the margin rather deeply incised at the pronounced 

 promesonotal and only feebly indented at the distinct meso- 

 epinotal suture. Pronotum as long as broad, a little narrower 

 behind than in front, its anterior corners in the form of small 

 acute teeth, which are as long as broad at their bases. Meso- 

 notum a little longer than broad, narrower behind than in 

 front, with evenly rounded anterior and lateral borders ; base 

 of epinotum longer than broad, rather narrow, especially 

 behind, where it is produced into two parallel, flat, blunt 

 teeth, which are longer than broad at their bases, as long as 

 their distance apart, and directed backward and upward. The 

 small notch-like space between the teeth is not marginate. 

 Declivity of epinotum shorter than the base, sloping, feebly 

 convex. Petiole thick at the base, when seen from above as 

 long as broad, with convex anterior and posterior surfaces, the 

 apical border compressed and bearing four long, slender, acute 

 spines, directed upward and backward, the inner pair approxi- 

 mated and shorter, so that an imaginary line joining the tips 



