150 Proceedings of the Royal Society of Victoria. 



genera strictly on the characters cited below. This statement 

 will prevent any difficulty arising in identifying my new species, 

 even if it should prove that any new genera have been founded 

 elsewhere based on the peculiarities mentioned below in some of 

 the species described. The principal instance of doubtful appor- 

 tionment occurs in 8aprosites, some of the species I attribute to 

 this genus having the intermediate coxae considerably more widely 

 separated inter se than they are in the American species before 

 me. I cannot, however, ascertain that any genus has been formed 

 at the expense of 8aprosites on this character, nor does it appear 

 to me a sufficient character for the establishment of a new genus. 

 A. — Mesosternum declivous between interme- 

 diate coxae — not continuing plane of 

 metasternum. 

 B. — Dorsal surface of elytra not having a 

 basal edging. 

 C. — Intermediate coxae approximate - - - Aphodius. 



CC. — Intermediate coxae widely separated 



from each other - . . - Proctammodes. 



BB. — Dorsal surface of elytra having a basal 

 edging. 

 C — Hind femora oblong or subparallel 

 (their tibiae narx-ow, not or scarcely 

 dilated externally). 

 D. — Pronotum not transversely sulcate. 

 E. — Sides of pronotum normal 

 EE. — Sides of pronotum explanate 

 DD. — Pronotum transversely sulcate 

 CC— Hind femora short and wide, their 

 front outline strongly arched - 

 A A. — Mesosternum horizontal, continuing the 

 plane of the metasternum. 

 B.^ — Labrum and mandibles normal 

 BB. — Labrum and mandibles protruded 



- Ataenius. 



Euparia. 



Rhyssemus. 



Psammodius. 



- Saprosites. 

 Saprus. 



Aphodius. 



The Australian species of this genus differ from all the other 

 Australian Aphodiides observed by me (except the two species 

 of Proctammodes) in that the dorsal surface of the elytra passes 



