BY T. G. SLOANE. 445 



A monotypie group showing no near affinity to any other group, 

 but with evident suggestions of being a connecting form between 

 Notonomus and Sarticus. 



81. JY. mediosulcatus Chaud.,( = Adetipa punctata Cast., = 

 Omaseus occidentalis Cast., = 0. satanas Cast.) is the only species 

 as yet known from South-Western Australia; it varies greatly 

 in colour and appearance.* 



The chalybeus-group. 



Prothorax with posterior marginal puncture at basal angle. 

 Elytra feebly striate; interstices depressed (including eighth at 

 apex), third 2-punctate. Intercoxal declivity of prosternum 

 rounded. Intermediate tarsi with first joint spinulose on outer 

 side above usual row of external spinules; posterior tarsi often not 

 similarly spinulose, sometimes with one upper spinule, external 

 costa of first joint not well developed, sometimes obsolete; ony- 

 chium glabrous beneath. 



A satisfactory group, for which Motschulsky thought a generic 

 name needful (Ternox). Ohaudoir did not consider Ternox as dis- 

 tinct from Notonomus; and it seems to me that, if the separation 

 of Ternox had to be supported by valid reasons, such reasons would 

 not be easy to indicate; therefore, I follow Chaudoir in merging 

 Ternox with Notonomus. This group gives indications of ancient 

 relationships towards the sphodroides-group through N. tenui- 

 striatus SI., and also in a more shadowy way towards A 7 , mediosul- 

 catus Chaud. 



Table of Species. 

 l.(4)Co!our black. 

 2. (3) Elytra with humeral angles not raised; prothorax evenly rounded on 



sides, widest about middle .". 82. N. gravis Chaud. 



3.(2)Elytra with humeral angles strongly raised; prothorax rather obliquely 



narrowed to base, widest considerably before middle ... 



83.iV. molestus Chaud. 



4.(l)Elytra virescent. 



o.(6)Size large(17-21 mm.); elytra with basal border very little raised above 



lateral border at humeral angles 84. N. philippi Newm. 



*Sloane, These Proceedings, 1898, p. 478. 



