236 WHEELER. 



South West Australia: Lion Mill. 



I believe this form must be regarded as a distinct species as the 

 characters in which it differs from clarus, are, according to Forel's 

 statement, more than subspecific. The mandibles are not striated 

 as in froggatti and are less geniculate at their bases, the anterior 

 corners of the pronotum are more rounded, the thorax longer, the 

 epinotum not marginate above, the petiole hardly broader than long, 

 with shorter ventral tooth and the puncturation is feebler and sparser 

 than in froggatti. 



The " ergatomorphic female," described by Forel, is eyeless, with 

 swollen epinotum, shorter and more rounded head, the petiole 1| times 

 as broad as long, more voluminous gaster, emarginate pygidium, and 

 the surface is more opaque, more punctate and more pubescent than 

 in the worker. This singular individual measured 6.5 mm. It was 

 found in the same vial with a number of workers and undoubtedly 

 belonged to the same species. Forel believes that such individuals 

 must represent the type from which the dichthadiiform females of the 

 Dorylinse have developed. 



12. Eusphinctus (Nothosphinctus) manni sp. nov. 



(Fig. 6.) 



Worker. Length 3-5 mm. 



Head distinctly longer than broad, a little broader in front than 

 behind, with evenly rounded sides, feebly and broadly concave occi- 

 pital border and short, blunt posterior corners. Eyes and ocelli 

 absent. Occipital border marginate, the margination surrounding 

 the posterior corners. Carime of cheeks very feebly developed. 

 Mandibles not geniculate nor abruptly curved at the base, their 

 apical borders finely denticulate. Frontal carinse short, erect, sur- 

 rounding the antennal insertions in front, truncated and fused behind 

 in a depression uniting the antennal fovepe. Antennis rather slender; 

 scapes less than half as long as the head, thick at the apex, rather 

 suddenly narrowed at the basal fourth; funicular joints 2-9 much 

 broader than long, tenth joint as long as broad, terminal joint rather 

 slender, fully as long as the three preceding joints together. Thorax 

 fully 2| times as long as broad, distinctly narrowed in the mesonotal 

 region, flattened above, submarginate on the sides; pronotum with 

 rectangular humeri, vertically truncated and submarginate in front, 

 the mesoepinotal suture indicated by a feeble impression; epinotal 



