7 



204 Mr. J. O. Westwood's Descriptions 



parvo. Mandibulae apice bidentato, intus incisione profunda 

 membrana tecta. Antennae mediocres, articulis duobus basa- 

 libus brevibus, 3-tio omnium longissimo ; ultimls breviori- 

 bus, submoniliformibus, non aut vix incrassatis. Prothorax 

 latior quam longus, antice angustior, disco parum convexo. 

 Elytra oblongo-subovata, subdepressa, parum rugosa, late- 

 ribus fere parallelis ad basin prothorace latiora, ultra medium 

 paullo dilatata, apicibus sensim attenuatis. Pedes satis elon- 

 gati, simplices, tarsis heteromeris baud dilatatis. Presternum 

 pone basin pedum anticorum extensum in fossula triangular! 

 mesosterni subreceptum, metasternum satis elongatum, pos- 

 tice inter trocbanteres posticos emarginatura et ante apicem 

 in medio profunde impressum. 



This genus approaches very near to Cyphaleus, Hope (Westw. 

 Arc. Ent. vol. i. pi. 12, fig. 1), but is distinguished by its more 

 flattened form and less rugose surface. The species have some- 

 what the appearance of large narrow metallic-coloured species of 

 Colymhetes. They are exclusively natives of Western and Southern 

 Australia. 



Sp. 1. Prophanes aculeatus, Westw. (PI. XXI,*, fig. 4.) 



Pr. niger, elytris nigro-aeneis, nitidis, irregulariter punctatis, 

 lineisque subelevatis notatis, apicibus acuminatis, prothoracis 

 angulis anticis acute porrectis, disco bi-impresso. 



Long. corp. lin. 13. 



Habitat apud Swan River, Novae Hollandiae. 



In Mus. Melly. 



Antennae subbreves, articulis apicalibus parum latioribus. Pi'o- 

 thorax transversus, lateribus fere rectis, versus angulos pos- 

 ticos paullo rotundatis, angulis anticis elongato-aculeatis, 

 lateribus marginatis, disco tenuissime punctato, in medio bi- 

 impresso, utrinque etiam ad marginem posticum fossula pa- 

 rum profunda instructo. Elytra ad apicem sensim attenuata 

 et singulo in spinam terminalem producto, disco singuli lineis 

 tribus parum elevatis glabris, interstitiis punctatis. 



Sp. 2. Prophanes metallescens, Westw. (PI. XXII. fig. 5, and details). 



Pr. niger, nitidus, punctatus, elytris aeneo purpureoque tinctis, 

 apicibus truncatis, angulis externis truncaturae spinosis, pro- 

 thoracis angulis anticis acute porrectis, angulis posticis ob- 

 lique truncatis. 



Long. corp. lin. 11. 



