92 Mr. W. C. Crawley on new and 
There is also a fine reticulate ground-sculpture on the head, 
with the exception of the clypeus and occiput. 
This strikingly coloured species was taken by Mr. Hill 
(no. 604) at Koolpinyah, Northern Territory of Australia. 
The nest was in a small hole on a gravel ridge, and had 
neither crater nor mound, 
Type in the British Museum. 
Acromyrmex octospinosa, Reich., var. pallida, nov. 
% major. Entirely pale yellow ; antennze deeper yellow, 
teeth of mandibles dark brown or black. 
8 minima. Slightly deeper in colour than the 8 major. 
In both % major and minima the spines are somewhat 
thinner and shorter than in the type, but otherwise, with the 
exception of the colour, the new variety is similar to the type. 
Issororo, British Guiana, 1918 (Bodkin, no. 422). Nest 
in soil under a rock. The ants were associated with three 
new species of coccid. 
Types in the British Museum. 
Subfamily LV. Dozrcnoprrrw2, For. 
Iridomyrmex obscurus, sp.n. (Fig. 1.) 
8. Length 3°5 mm. 
Dark brown, with a faint metallic sheen; mandibles, 
clypeus, scapes, tibie, tarsi, and articulations of legs casta- 
neous. 
Fig. 1. 
io} 
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ea 
Profile of thorax of Iridomyrmex obscurus, sp. n. 
ay 
Clypeus, front, occiput, pronotum, node, and base of gaster 
with groups of stiff hairs ; tibize with exserted hairs, antenne 
with none. Whole body covered with a fine cinereous 
pubescence. 
Head longer than broad, wider behind than in front, widest 
at level of eyes, which are placed just behind the middle of 
