Australian Coleoptera. 209 



A. — Species not having a continuous sharply 

 defined longitudinal sulcus on the pro- 

 thorax. 

 B. — Front declivity of shoulder not asperate 

 and pilose. 

 C. — All the elytral interstices wider than 

 the striae. 

 D. — The distance between the pair of 

 tubercles behind the base of the 

 clypeus, not more than half the 

 Avidth of the labrum - - capitalis, Blackb. 



DD. — The distance between those 

 tubercles scarcely less than 

 the whole width of the labrum 



australasicus, Bhickb. 

 CC. — The lateral interstices of the elytra 



not wider than the adjacent striae - dilatatus, Dalm. 

 BB. — Front declivity of shoulder asperate 



and pilose ------ politus, Burm. 



AA. — A well defined continuous longitudinal 

 sulcus (about as deep and wide as the 

 elytral striae) on prothorax - polyphyllus, W. S. Macl. 

 M. capiialis,s,^. Y\ov. Minus depressus; nitidus; ater, abdomine 

 supra ferrugineo ; pygidio, labro, prosterno ad latera, antennis 

 pedibusque, pilis fulvis plus minusve crelire vestitis; labro antice 

 leviter (fere ut M. dilatati^ Dalm.) emarginato, fere symmetrico, 

 grosse sat sparsini punctulato, sat nitido ; clypeo minus nitido, 

 minus perspicue punctulato, longitudinaliter inajqualiter rugato, 

 utrinque ut dens magnus conicus producto ; capitis partibus 

 depressis minus (elevatis magis) nitidis, vix perspicue punctulatis 

 sed grosse vermiculato-rugulosis ; capite postice (ad partis 

 excavatae basin) tuberculo elongato transverso (hoc in medio 

 antrorsum producto fortiter dentiformi) et ante hunc tuberculo 

 laminiformi sat anguste bitido armato ; antennis sat elongatis, 

 flabello 6-articulato (articulis gradatim longioribus, quaui M. 

 politic Burm. multo longioribus); prothorace fere laevi, antice sat 

 fortiter sinuato vix emarginato linea mediana subtil issima longi- 

 tudinali (hac antice et postice omnino deleta) impresso, utrinque 

 pone medium fovea magna profunda (hac in fundo punctulata) 



