AUSTRALIAN CERAPACIIYINI. 253 



than the two preceding together. Thorax as broad through the 

 pronotum as through the epinotum, distinctly narrowed in the middle, 

 the dorsum feebly convex, the mesopleune rather concave, the epino- 

 tal declivity nearly vertical, feebly conca\e. The anterior border 

 of the pronotum, the sides of the dorsum, the boundary between 

 the epinotal base and declivity, the sides of the latter and the pro- 

 sterna sharply marginate. Petiole as broad as the epinotum, nearly 

 l| times as broad as long, as broad behind as in front, with feebly and 

 evenly rounded sides, concave anterior border and the posterior 

 corners projecting as flattened, rather acute teeth. Only the anterior 

 and lateral borders are marginate. In profile the dorsal surface is 

 feebly convex, the anterior surface vertical and joining it at a right 

 angle, the ventral surface with a strong, pointed tooth at the anterior 

 end. Postpetiole broader than long, broader than the petiole and 

 distinctly broader in front than behind, with distinctly rounded 

 anterior, lateral and posterior borders, the lateral borders marginate. 

 First gastric segment a little broader than long and a little broader 

 than the postpetiole, distinctly broader behind than in front. 

 Pygidium with a large concave depression on its dorsal side, marginate 

 and minutely spinulose on the sides. Legs moderately stout; coxse 

 of hind pair with a small, translucent lamella at the tip on the inner 

 side. 



Smooth and shining; mandibles coarsely and sparsely punctate. 

 Dorsal surface of body with small, scattered, piligerous punctures. 



Hairs grayish yellow, erect, rather long, slender, pointed and sparse, 

 not appreciably longer and denser on the gaster than on the remainder 

 of the body, shorter and somewhat more oblique on the scapes and legs. 

 Legs, coxse and scapes with rather long, appressed, grayish pubescence. 



Black; gaster, except the extreme base of the first segment rich, 

 cherry red. Mandibles, except their bases and borders, insertions 

 and terminal joints of antennae, tarsi and articulations of legs and the 

 space between the frontal carinse, reddish brown. 



Described from a dozen specimens taken Dec. 4, 1914 in the BuUi 

 Pass, New South Wales. They were running over the sand in a loose 

 file, carrying the nude pupae of a Myrmicine ant whose nest they had 

 just plundered. 



This beautiful species is easily distinguished by its peculiar color 

 and the shape of its petiole. 



