56 Linnean Society. [June 19, 



species may not prove a concolorous variety of that insect. Judging 

 from the description and figure of the antennae however, this suppo- 

 sition appears very doubtful. 



Subgenus Arthropterus. 

 Cerapterus {Arthropterus) denudatus, Westw, 



C. piceo-castaneus subnitidus tenuissitne punctatus, elytris magis nitidis, 

 antennis angustis planis; articulo ultimo duobus prsecedentibus longi- 

 tudine sequali, capitis angulis posticis porrectis, prothorace capite 

 paullo angustiori supra subdepi-esso truncato-cordato linea media 

 impressa, pedibus subangustis ; tibiis omnibus angulo externo apicali 

 acuto. — Long. corp. lin. 6. 



Hah. in Nova HoUandia, ad ripas fluvii " Mundarra " dicti. 



In Mas. F. Bond. 



Cerapterus (Arthropterus) Wilsoni, Westw. 



C. totus castaneus nitidus, capite pai-vo punctato et inter oculos bi- 

 impresso : angulis posticis vix ultra oculos lateraliter porrectis, anten- 

 narura clava subangusta sub lente tenuissime granulata ; articulo 3tio 

 clavae latiori : ultimo angustiori longitudine vix tribus prsecedentibus 

 • asquali, pronoto subquadrato punctato : angulis anticis rotundatis : disco 

 baud longitudinaliter sulcato ; elytris elongatis tenuissime punctatis : 

 punctis ad basin majoribus castaneis : sutura magis fulvescenti, pedibus 

 angustis; tibiis vix tarsis duplo latioribus. — Long. corp. lin. 7. 



Hab. in Novse Hollandise Adelaide, D. Wilson. In Mus. Westw. 



Cerapterus (Arthropterus) suhsulcatus, Westw. 



C. totus castaneus, capite punctato inter oculos baud impresso : angulis 

 posticis pone oculos valde porrectis, antennis tenuissime punctatis clava 

 sensim a basi ad articulum ultimum latiori ; articulo ultimo sexta pai-te 

 latiori quam longo tribusque articulis prsecedentibus longitudine sub- 

 gequali, pronoto punctato cordato-truncato : sulco longitudinali medio 

 fere omnino obliterato, elytris longitudinaliter subsxdcatis vix punctatis : 

 disco setis brevissimis pauciter instructobasilongius setosis, tibiis tarsis 

 plus duplo latioribus basi angustioribus apice externo praesertim in 

 pedibus anticis acutis. — Long. corp. lin. 5|. 



Hab. in Nova Hollandia, King George's Sound. In Mus. D. Parry. 



Subgenus Pleuropterus. 

 Cerapterus (Pleuropterus) alternans. 

 C. rufus, elytris magis fnlvis : singulo plagis duabus latis nigris postice con- 

 junctis, opacus fere Itevis, capite brevi ; vertice antice longitudinaliter 

 impresso punctisque duobus impressis intra partem oculorum posticam, 

 antennis fere planis ; clava e basi ad apicem sensim angustata : arti- 

 culo basali postice in lobum rotundatum producto, pronoto transverse : 

 angidis anticis rotundatis : posticis valde incisis : inter angulos posticos 



