428 Entomological Society, 



majori, binisque lateralibus minoribus ; toto corpore infra luteo. 



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

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



striatiSf purpurascentibus ; corpore infra ceneo, pedibus piceis. 



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

 Hydrobius marginicollis, Hope. Niger, Icevis margine postico 



thoracis rufo-piceo, corpore infra nigra et pubescenti segmentis 



abdominis utrinque macula rufescente notatis, pedibus piceis. 



Long. lin. 5j, lat. lin. 2^. 

 Hydrobius assimilis. Affinis pr(Bcedenti, at minor, toto corpore 



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

 . pore infrvi nigro tomentoso, palpis tarsisque rufo -piceis, femoribus 



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



Sternoxi. 

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

 angulis anticis rotundatis ; thorace convewo 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 punctata ; elytris castaneis quibus- 

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

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



Plocsederus Australasise, Hope. Piceus, pubescentid grised tectus ; 

 thorace constricto rugoso ; elytris bispinosis grisea piceoque co- 

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

 bus tarsisque infra flav a- spongiosis. Long. lin. 10 J, 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. Ccenosus, colore nigrescenti marmo- 

 ratus ; thorace spinoso punctis sparsim notatis ; elytris bispino- 

 sis concoloribus ; corpore infra grisescenti, tarsis suprd, et infrh 

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



Stenochorus vicinus, Hope. Nigra-piceus, antennis pallidiaribus , 

 thorace tuberculato, spinis lateralibus vix distinctis • elytris piceis 

 disco favis maculis notata, guttdflavd ovali ante apicem pasitd ; 

 corpore infr a fusco-griseo , pedibus piceis, femoribus incrassatis. 

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



Stenochorus- cruciger, Hope. Rufa-piceus, antennis pallidiaribus, 

 thorace tuberculato lateralibus spinis subacutis ; elytris piceis 

 disco in medio cruce flavd notatis, apicibus concoloribus ; carpore 

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



