Entomological Society. 427" 



hexagono lateribus marginatis concolori; elytris striato-puncta- 



tis ; corpore infra piceo, pedibus concoloribns . Long. lin. 4^, 



lat. lin. 1^. 



This, I believe, is the first time that Catascopus has occurred in 



New Holland, and it is singular that the form of it approaches the 



species of Africa much more than those of India. 



Gnathaphanus (M. L..'') Licinoides, Hope. Niger, thorace fossulis 

 posteafortiter impressis, elytris sulcato-striatis, punctisque excava- 

 tis, corpore infra atro nitido, tar sis infrU fusco-spongiosis . Long. 

 Un. 5|, lat. lin. 1|. 

 I have little hesitation in regarding this insect as a true Gnatha- 

 phanus ; it has not hitherto been found but in the island of Java. 



Cyrtoderus*, n. g. 



Antennce W-articulatee, articulo \'^° quatuor proximis aquali, cylin- 

 drico, apice incrassato, subtruncato, reliquis fere cequalibus. Man- 

 dibulce apice subincurvatce. Lubrum quadratum medio productum 

 subciliatum. Mentum transversum. Palpi maxillares ultimo ar- 

 ticulo subsecuriformi, obliqtie truncato. Palpi labiates ultimo ar- 

 ticulo fere trigono, valde securiformi. Thorax subquadratus an- 

 gulis posticis lateribusque rotundatis. Corpus gibbosum. Pedes 

 robusti, tibiis spinosis. 



Cyrtoderus Australasise. Niger, antennarum articulis tribus primis 

 piceis, reliquis pubescentibus ; thorace lined medid longitudinali, 

 antice posticeque interruptd, fossuldque utrinque retrorsum fortiter 

 impressd ; scutello parvo vix distincto ; elytris striatis interstitiis 

 elevatis, marginatis, serie tuberculorum ad margines externos ap- 

 proximatd ; corpore subtus nigro, tibiis spinosis. Long. lin. 8, 

 lat. lin. 2^. 



Hydra DEPHAGA. 



Cybister insularis, Hope. Niger, capite integro convexo, oculis albis, 

 thorace stib lente subtilissime punctato, marginibus exterloribus 

 flavescentibus ; elytris nigris jlavo-marginatis, disco binis lineis 

 punctorum haud fortiter impresso ; corpore infra nigro nitido, 

 pedibus quatuor anticis flavo-ornatis, posticis atro-piceis. Long, 

 lin. 8, lat. lin. A\. 



This is the smallest species known, being scarcely larger than a 

 Hydaticus. 



Colymbetes monostigma, Hope. Ater, nitidus, elytris uno aurantio 

 stigmate ornatis, corpore infra nigro, pedibus rufo-piceis. Long, 

 lin. 3^, lat. lin. 2. 



Hydroporus coUaris, Hope. Nigro-piceus punctatus ; thorace medio 

 convexo, lateribus utrinque fortiter depressis ; elytris subtilissime 

 punctulatis piceis, corpore infra pedibusque concoloribus. Long. 

 lin.l|, lat. lin. |. 



Dineutes (MacLeay) Gouldii, Hope. Nigro-ceneus nitidus, thora- 

 cisque elytrorumque margine favo, elytris trispinosis, spina medid 



* Ky^TSf and "hsQn. I know not where to place this genus; it seems allied 

 to Zabrus, and unites in itself the characters of other families. I have alsa 

 received it from Melville Island. 



2 F2 



