AUSTRALIAN CERAPACHYINI. 255 



ventral surface with a blunt, compressed tooth in front. Postpetiole 

 a little broader than the petiole, subrectangular, scarcely broader 

 behind than in front, convex above and on the sides, the latter sharply 

 niarginate. First gastric segment broader than long and broader 

 than the postpetiole, a little broader behind than in front. P\gi- 

 dhnn feebly concave above, niarginate and minutely spinulose on the 

 sides. Legs moderately stout; coxae of the hind pair with a large, 

 rounded, translucent lamella at the tip on the inner side. 



Smooth and shining; mandibles coarsely and sparsely punctate. 

 Upper surface of body with very sparse piligerous punctures, which 

 are large on the vertex of the head and the middle of the postpetiole. 



Hairs yellowish, sparse, rather long, slender, erect, shorter and more 

 oblique on the appendages. Sides of petiole, coxse, legs and antennal 

 scapes with conspicuous grayish pubescence. 



Reddish yellow; postpetiole and gaster, except the tip, black or 

 very dark brown; pronotum and often also the sides of the mesono- 

 tum and sides and posterior portions of the base of the epinotum 

 castaneous or reddish brown; mandibles, antenna-, legs and tip of 

 gaster reddish brown, varying in depth of hue in different specimens. 



Female. Length 4.5 mm. 



Resembling the worker, but with larger eyes, ocelli and a diflferent 

 thorax. The latter is narrower than the head and like the thorax 

 of the worker in shape, but with distinct pronotal, mesonotal, scutellar, 

 metanotal, parapteral, sternal and mesepimeral sclerites, though 

 there are no traces of wing stumps. The mesonotum is very small 

 and flat, suborbicular, scarcely longer than broad. The gaster is 

 much larger than in the worker, fully twice as long as broad. 



Sculpture, pilosity and color much as in the worker, ocellar region 

 with a brown cloud. 



Described from forty workers and a single female, forming the 

 greater portion of a single colony taken Sept. 16, 1914 near Souther- 

 land, a short distance from Sydney, New South Wales. The ants 

 were bunched together under a large piece of sandstone in a thin layer 

 of earth which in turn was lying on the sandstone wall of a deep ravine. 

 There were no larvte, and as the preceding night had been very rainy, 

 I infer that the colony had been washed out of its nest and had taken 

 refuge in the place in which it was found. Two workers taken by 

 Mr. E. H. Zeck at Berowra, N. S. W., and belonging to Dr. W. M. 

 Mann, are also referable to this species, which differs from all the pre- 

 ceding members of the genus in its peculiar color and small size. 



