new Ants from Australia. 437 



dark yellow-brown, witli uo sign of metallic sheen, and in 

 the following points : — 



The head is sliorter 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 striae forming a narrow arch in the centre near the apex 

 of the segment. The segment has no punctures, but there 

 is a slight emarginatiou 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 

 striae, but the striie are much finer than in the first segment. 

 (In var. variaiis the second scnmcnt is much more finely 

 and transvi'isuly striate, with no arching, and is jjunctuied 

 in addition.) 



All the thirty-five specimens examined conform to the 

 above description. 



Perth, AY. Australia {Clark, no. 31). 



Type in W. C. C. coll. 



Though hesitating to add to the varieties of such a vari- 

 able species as metalhca, 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 corianus, Mayr, var. obscura, nov. 

 (Fig. 1*) 



$. Length 11"5 mm. (without mandibles); mandibles 

 2-0 mm. 



Differs from typical coriarius as follows : — 



coriarius. (Fig. 2.) 

 (Specimen fromGodeft'royMus.) var. obscura. 



Scapes do not quite reach oc- Scapes pass occiput by about 



ciput. lialf their breadth. 



Occipital groove deep and broad. Occipital groove less deep and 



narrower. 

 Striation of head very even and Slriation of head very fine, not 



distinct under x 10 magnification. distinct under xlO. 



I'ronotum evenly transversely Striation in centre of pronotum 



striate. oval, with the long diameter of 



the oval across the segment. The 

 whole of thorax more finely sculp- 

 tured than in coriarius. 

 Base of first segment of gaster First and second segments only 



longitudinally reticulate - striate ; very superficially reticulate, 

 whole of second segment reticu- 

 late with several points. 



* The names used in reference to the three teeth are : — apical tooth 

 for the terminal, subapical for the smaller one following it, f\ndi preapical 

 for the large broad tooth forming the innermost of the three. 



