new Ants from Australia. 439 
Whole of head above and below, including the fosse, 
finely striated right up to the occiput. The occipital 
groove extends from the edge of the depression to the 
occiput, deep. 
The striz on top of pronotum in front are spiral, on the 
hinder part they are transverse. On the rest of thorax 
they are transverse, much coarser on the base of epinotum. 
The declivity has a few coarse transverse striz. 
Fig. 3. 
Head and end of mandible of Odontomachus rugiceps, Sm., type. 
Back of node quite smooth, the front has transverse 
strie. 
Gaster microscopically reticulate. 
Forel’s race acutidens (/.c. and Ann. & Mag. Nat Hist. 
ser. 9, vol. vil. p. 90, 1921) varies in length from 7°5 to 
10:0 mm. or more, the largest % almost deserving the name 
of “ soldier.” 
