437 
new Ants from Australia. 
dark yellow-brown, with no sign of metallic sheen, and in 
the following points :— 
The head is shorter and broader behind. The node of 
the petiole is distinctly less pointed in front (when seen 
from above). The sculpture of the gaster is distinct; the 
first segment is coarsely and evenly semicircularly striate, 
the striz forming a narrow arch in the centre near the apex 
of the segment. The segment has no punctures, but there 
is a slight emargination or notch in the apical border, which 
is present in all the specimens examined, The second 
segment is similarly striate, with a similar arching of the 
strize, but the strize are much finer than in the first segment. 
(In var. varians the second segment is much more finely 
and transversely striate, with no arching, and is punctured 
in addition.) 
All the thirty-five specimens examined conform to the 
above description. 
Perth, W. Australia (Clark, no. 31). 
Type in W.C.C. coll. 
Though hesitating to add to the varieties of such a vari- 
able species as metallica, I have thought it best to do so, as 
neither Prof. Emery nor myself could make these two forms 
agree with any of the published varieties. 
Odontomachus coriarius, Mayr, var. oBscURA, nov. 
(Fig. 1%.) 
%. Length 11°5 mm. (without mandibles) ; mandibles 
2°0 mm. 
Differs from typical coriarius as follows :— 
coriartus. (Fig, 2. 
(Specimen from Godeftroy Mus.) var. obscura. 
Scapes pass occiput by about 
half their breadth. 
Occipital groove less deep and 
narrower. 
Striation of head very fine, not 
Scapes do not quite reach oc- 
ciput. 
Occipital groove deep and broad. 
Striation of head very even and 
distinct under X10 magnification. 
Pronotum evenly transversely 
striate, 
Base of first segment of gaster 
longitudinally reticulate - striate ; 
whole of second segment reticu- 
late with several points. 
distinct under x 10. 
Striation in centre of pronotum 
oval, with the long diameter of 
the oval across the segment. The 
whole of thorax more tinely sculp- 
tured than in cortarius. 
First and second segments only 
very superficially reticulate. 
* The names used in reference to the three teeth are:—apical tooth 
for the terminal, subapical for the smaller one following it, and preapical 
for the large broad tooth forming the innermost of the three. 
