428 Entomological Society. 



majori, binisque lateralibus minoribus ; toto corpore infra luteo. 

 Long. lin. 3|, lat. lin. 1-|. 



Gyrinus Iridis, Hope. Atro-ceneus, elytris abrupte truncatis, 

 striatis, purpurascentibus ; corpore infra aneo, pedibus piceis. 

 Long. lin. 3^, lat. lin. 1|. 



Hydrobius marginicollis, Hope. Niger, Icevis margine postico 

 thoracis rufo-piceo, corpore infra nigra et pubescenti segmentis 

 abdominis utri?ique macula rufescente notatis, pedibus piceis. 

 Long. lin. 5|, lat. lin. 2|. 



Hydrobius assimilis. Affinis pracedenti, at minor, toto corpore 

 supra nigro ; elytris sub forti lente subtilissime punctulatis ; cor- 

 pore infra nigro tomentoso, palpis tarsisque rufo-piceis , femoribus 

 tibiis nigricantibus. Long. lin. 5, lat. lin. 2^. 



Sternoxi. 

 Agrypnus grandis, Hope. Niger, capite fere quadrate auricomato, 

 angulis anticis rotundatis ; thorace convexo disco lateribus parum 

 depressis ; elytris atris striato-punctatis , corpore infra concolori, 

 pedibus piceis et auro-tomentosis. Long. lin. 15, lat. lin. 5. 

 The above is the only species of large dimensions ; there are also 

 seven others from Port Essington, but as they are not remarkable in 

 any respect, and are allied to various undescribed species, I pass 

 them by. 



LONGICORNES. 



Mallodon insulare, Hope. Castaneum, capite atro, antennis piceis, 

 mandibulis denticulatis ; thorace transverse quadrato, lateribus 

 valde serratis, disco variolosa punctato ; elytris castaneis quibus- 

 dam lineis parum elevatis distinctis, corpore infrd, rufo-piceo, pe- 

 dibus atrioribus. Long. lin. 21, lat. lin. 6^. 



Plocsederus Australasise, Hope. Piceus, pubescentid grised tectus ; 

 thorace constricto rugoso ; elytris bispinosis griseo piceoque co- 

 lore irroratis ; corpore infra griseo-tomentoso, pedibus concolori- 

 bus tarsisque infra fiavo- spongiosis. Long. lin. 10^, lat. lin. 2^. 



There is one remarkable character apparently peculiar to this spe- 

 cies ; the male insect has the third and fourth joints of the antennae 

 subglobose : I can scarcely regard the appearance as a sexual distinc- 

 tion. 



Monohammus mixtus, Hope. Canosus, colore nigrescenti marmo- 

 ratus ; thorace spinoso punctis sparsim notatis; elytris bispino- 

 sis concoloribus ; corpore infra grisescenti, tarsis supra et infrcL 

 auricomatis. Long. lin. 11, lat. lin. 3^. 



Stenochorus vicinus, Hope. Nigro-piceus, antennis pallidioribus , 

 thorace tuberculato, spinis lateralibus vix distinctis ; elytris piceis 

 disco favis maculis notato, guttd flavd ovali ante apicem positd; 

 corpore infra fusco-griseo, pedibus piceis, femoribus incrassatis. 

 Long. lin. 9, lat. lin. 2. 



Stenochorus cruciger, Hope. Rufo-piceus, antennis pallidioribus, 

 thorace tuberculato lateralibus spinis subacutis ; elytris piceis 

 disco in medio cruce flavd notatis, apicibus concoloribus ; corpore 

 infra rufo-piceo. Long. lin. 7, lat. lin. 1^. 



