AvMralian Coleoptera. 217 



C. — Joints 2 and 3 of antennae together 



much longer than the 4th joint - Microrhagus. 

 CC. — Joints 2 and 3 of antennae (3 exces- 

 sively minute) together much 

 shorter than the 4th joint - Entomophthalmus. 

 BB. — Disc of pronotum dev6id of carinae. 

 C. — Hind outline of mandibles strongly 

 sinuous. 

 D. — Apex of apical ventral segment pro- 

 duced in a short narrow process. 

 E.— Episterna of metasternum parallel Nematodes. 



EE. — Episterna of metasternum 



narrowing towards front - - Trigonopleurus. 

 DD. — Apex of apical ventral segment 



not produced - . - - Hypocoelus. 



CC. — Hind outline of mandibles straight or 

 nearly so. 

 D. — Joint 4 of tarsi produced beneath - - Eumenes. 

 DD. — Joint 4 of tarsi not produced Ijeneath. 

 E. — Clypeus strongly narrowed at base. 

 F. — Antennal joints gradually and 



continuously longer from 4th joint Orodotes. 

 FF. — Antennal joints notably elon- 

 gated only from 9th joint - Dyscolocerus. 

 EE. — Clypeus very feebly narrowed at base Lycaon. 



Dyscharachthis (gen. nov. Eucnemidarum). 

 Corpus breve, sat latum, postice obtuse angustatum ; clypeus 

 ad basin sat angustatus, a fronte linea suljtilissima continua (hac 

 contorta ut litteram w simulat) divisus, antice sat rotundatus; 

 frons longitudinaliter carinata ; mandibula minus rugulosa, 

 postice fere recta ; antenni^ sat breves (prothoracem vix super- 

 antes), tiliformes, sat roliusta', articulo 3"- quam 4"" multo 

 longiori ; pronotum transversum, antrorsum a basi arcuatim 

 parum fortiter angustatum, ad basin fortiter bisinuatum, lobo 

 mediano (hoc a pronoto sulco recto transverso insigni diviso) lato 

 bene definito, angulis posticis acutis nullo modo divaricatis ; 

 suturae prosternales manifeste impressit> rectje ; sulci prosternales 

 marginales profundi sat lati (sed quam basis trianguli propleuralis 



