816 



and straight posterior surface, and sharp apical border, which 

 seen fr9m behind is rounded and entire. Gaster of the usual 

 shape. Legs rather slender; tibiae cylindrical. 



Shining ; thorax slightly more opaque. Mandibles rather 

 coarsely punctate; head and thorax densely punctate-reticu- 

 late, gaster very finely, transversely rugulose. Hairs erect, 

 short, very sparse, present only on the mandibles, clypeus, 

 front, and venter. Femora with a few bristles at their tips ; 

 tibiae with a sparse row of bristles along their flexor surfaces. 

 Pubescence absent on the body, very short, sparse, and 

 appressed on the tibiae and scapes. Black ; mandibles, 

 clypeus, cheeks, and front deep-red ; antennae and tarsi 

 reddish-brown; coxae, femora, and tibiae yellow; knees 

 infuscated. 



Worker minor. — Length, 5 '5 -6 mm. 



Body slender ; head subrectangular, about as broad 

 behind as in front, nearly one and a half times as long as 

 broad, with straight posterior and lateral borders. Eyes large 

 and prominent, situated at a distance less than their length 

 from the posterior corners of the head. Clypeus carinate, its 

 anterior border entire, subangularly produced in the middle. 

 Antennae very slender, reaching nearly half their length be- 

 yond the posterior corners of the head. Thorax very long, 

 narrow, and low, less compressed behind than in the major 

 worker, in profile evenly rounded, highest in the middle, 

 pronotum not marginate in front and on the sides, epinotum 

 without distinct base and declivity, but merely continuing the 

 gentle curve of the mesonotum. Petiole with its anterior sur- 

 face more convex and its upper-border more transverse than in 

 the major worker. Graster small and narrow. 



Sculpture much as in the major worker, but thorax more 

 shining and cheeks sparsely and feebly foveolate. Pilosity 

 much more abundant than in the large worker. There are 

 very sparse, erect hairs on the whole upper-surface, including 

 the petiole, and also on the gula. The head is covered with 

 sparse and rather long yellowish pubescence. Head and 

 thorax brown, petiole and gaster black ; scapes and legs, 

 except the tarsi, yellow, the latter and the anterior half of 

 the head pale-brown. 



Described from a single major and three minor workers 

 from the Everard Range. As all of these specimens were 

 glued on the same card it would seem that they must have 

 been taken from the same nest. The major and minor workers, 

 however, differ in so many important particulars as to suggest 

 some doubt as to their being co-specific. 



This species is very closely related to C. (Myrmogonia) 

 m,ichaelseni, Forel, from South-western Australia, judging 



