98 ON THE SCYDM^NIDES OF N. S. WALES, 



of a smaller size, and in having the club of the antennae less 

 elongated, the penultimate joint being almost globose. The 

 penultimate joint of the max. palp, is thicker in proportion in the 

 present than in the preceding species. 



Heterognathds geniculatus. 



Piceo-castaneus ; antennarum articulo penultimo ultimo valde 

 latiori et cum antepenultimo alte emarginato ; thorace ad 

 basin piceo 4-foveolato, ante medium latiori, anticerotundato 

 postice contracto. 

 Long. -^ 

 South Creek. 



The large size of the club and the smallness of the three 

 preceding joints give to the antennas of this and the next species 

 H. princeps, a geniculate appearance. The 5th joint is thicker 

 and longer than the 3rd or 4th. The last joint of the max. palpi 

 is hardly distinguishable. 



Hetbeognathus princeps. 



Castaneus ; antennarum clavae articulo penultimo ultimo latiori 

 obsolete emarginato, antepenultimo alte emarginato : thorace 

 antice rotundato postice contracto, ad basin 2-foveolato. 

 Long.^^. PI. VII. 1,2. 

 Paramatta. — Lane Cove. 



This species may readily be distinguished from the preceding, 

 which hovpever, it much resembles, by the obsolete notch on the 

 10th joint of the antennas. It was found associated with H. 

 Carinatus in an ant's nest. 



Heterognathus armitagei. 



Pallide castaneus ; antennarum clava 4-articulata, articulis 8, 

 9, et 10 subaequalibus, ultimo longiori acuminato ; thorace 

 fossula transversa basali. 



Long. yfo. 



Pennant Hills, under dead bark. 



I discovered this very distinct species in an entomological 

 excursion with the Rev. F. Armitage, over his farm at the 



