610 NEW FOSSORIAL HYMENOPTERA, 



Legs short, the posterior femora serrate, intermediate coxae 

 scarcely separated. 



Hab. — Mt. Wellington, Tasmania, 2,200 ft. ; January, 1<J; 

 March, (J 9 in cop. 



The male is the type. 



The male specimen, taken in March, has the abdomen almost 

 entirely black. There is another specimen of the typical form of 

 the male with red on the abdomen in the Tasmanian Museum, 

 taken at a lower elevation. The species is easily distinguished by 

 the yellow apical joints of the antennae in the male. It belongs to 

 the group of E. ichneumoniformis, Sm., but is larger and more 

 robust than any of the related species. Two species of Ichneu- 

 monidce, taken freely in the same locality, also have the apical 

 portion of the antennae yellow and the abdomen red, and though 

 rather smaller, closely resemble this Eirone. 



Subfamily Thinning. 

 Ariphron bicolor Erichs. 



Ariphron bicolor Erichs., Arch. f. Naturg. viii., p.264, 1842,9. 



Ariphron rigidulus Turn., Proclaim. Soc N. S. Wales, xxxii., 

 p.274, 1907,<J. 



Taken in cop., by Mr. Lea, at Ulverston, Tasmania. I do not 

 believe the Victorian record for the male is correct. I took 

 several males at Eaglehawk Neck in Tasmania, flying round and 

 settling on a fallen Eucalyptus log, which contained a nest of 

 Myrmecia ants. I searched the ants' nest as far as possible, 

 hoping to find the female, but was not successful. 



Ariphron petiolatus Sm. 



Thynnus petiolatus Sm., Cat. Hym. B.M. vii., p.36, 1859,<J. 



9. Nigra, punctata; pygidio integro; antennis tuberculisque 

 antennalibus fusco-testaceis; mandibulis fusco-ferrugineis. Long. 

 8 mm. 



9. Mandibles falcate, not bidentate ; head shining, closely 

 microscopically punctured, with larger scattered punctures, a 

 little broader anteriorly than long, but a little longer than the 

 posterior breadth, an obscure, short, frontal sulcus, the antennal 



