Art. V. — Revision of tJte Australian Aphodiides, and 

 Descrijitions of Three New Species allied to them. 



By Rev. T. BLACKBURN, B.A. 



(Communicated by the Hon. Secretary). 

 [Read 9th June, 1904.] 



SCATONOMIDES. 



Thyregis, gen. nov. 



Corpus oblongum, convexum ; clypeus antice emarginatus ; 

 palporum maxillarium articulo apicali elongate, manifeste acu- 

 minato, mentuni antice emarginatuni; palporum labialium articu- 

 lis P, 2''que sat aequalibus leviter dilatatis, 3° angustiori paullo 

 breviori ; antennae 9-articuIatae ; prothorax subtus ad caput 

 recipiendum A'ix impre.ssus ; scutellum valde minutum sed baud 

 plane obtectuni ; elytrorum epipleurae angustae ; coxae anticae 

 fere ut Coptodactylae sed inter femora nonnihil latiores ; coxae 

 intermediae sat parallelae ; metasternum elongato-quadratum, 

 episternis modicis (fere ut Coptodactylae) ; pygidium (exempli 

 typici) verticale ; tibiae anticae extus tridentatae, subtus carina 

 marginatae (ut Coptodactylae) ; tarsi antici modici ; tibiae pos- 

 ticae apicem versus fortiter dilatatae, extus bidentatae, ad apicem 

 sat longe setosae et calcari modico armatae ; tarsi postici modici, 

 articulis basali sat brevi fortiter triangulari (quam ad apicem 

 latus baud longiori) 2° quam basalis vix breviori sed multo angus- 

 tiori 3" 4"que gradatim paullo brevioribus et angustioribus 5° 

 quam praecedentes 2 conjuncti sublongiori ; unguiculi parvi ; 

 abdomen medium brevissimum, suturis bene definitis. 



I cannot find any described genus of the Coprides having the 

 above characters in combination. According to Lacordaire's 

 classification, this species must stand in that author's group 

 Scatonomides, on account of its having the third joint of its 

 labial palpi well developed and its front coxae not prominent ; 

 and the following characters place it (among the genera of that 

 group) beside Choeridium, viz.: — Elytral epipleurae narrow, ven- 

 tral sutures well defined, sides of elytra not emarginate, front 



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