AUSTRALIAN CERAPACHYINI. 



241 



borders nearly straight. Clypeus very short, vertical, fused with 

 the front. Frontal carina? large, erect, rounded, truncated and 

 confluent behind. Frontal groove short but distinct. Carina of 

 cheeks bluntly dentate in front, curving inward behind and ending 

 half way between the eye and antennal insertion. Posterior border 

 of head inarginate, the margination at the posteroinferior corner 

 sending a horizontal carina forward nearly to the eye and another 

 ridge downward and forward along the lateral surface of the gula 

 half way to the anterior border of the head. Antennae rather long 

 and slender; scapes more than half as long as the head, slender at the 

 base, gradually enlarging towards their tips; first funicular joint a 

 little longer than broad, second twice and third nearly twice as long 

 as broad; remaining joints 1^ times as long as broad, except the last 

 which is slender and pointed, twice as long as broad and not longer 



Figure 7. Phyracaces heros sp. nov. Worker; a, lateral view of body; 

 b, dorsal view. 



than the two preceding joints together. Thorax through the pro- 

 notum narrower than the head and the epinotum, narrowed in the 

 mesonotal region, in profile evenly rounded and rather convex above 

 to the epinotal declivity which is straight and sloping. Pleurse con- 

 cave. Anterior border, sides of thoracic dorsum and of epinotal 

 declivity strongly marginate. Boundary between base and declivity 

 of epinotum feebly marginate; corners of epinotum bluntly dentate. 

 Petiole a little broader than the epinotum, a little broader than long, 

 decidedly narrower behind than in front, with straight anterior and 

 convex lateral borders, its posterior border deeply excised in the 

 middle, with a flattened, rounded lobe at each corner. The whole 

 border is marginate except in the middle behind. In profile the upper 

 surface of the petiole is flattened, its anterior surface abrupt and 

 truncate, forming a right angle with the dorsal surface and longer 



