Entomological Society, 427 



hexagono lateribus marginatis concolori; elytris striatb-puncta- 



tis ; corpore infrd, piceo, pedibus concoloribus . Long. Un. 4^, 



lat. lin. 1^. 



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



New HolJand, 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 sulcata -striatis, punctisque excava- 

 tis, corpore infrd atro nitido, tarsis infra fusco- spongiosis. Long, 

 lin. 5f, 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 ll-articulatee, articulo \"^ quatuor proximis aquali, cylin- 

 drico, apice incrassato, subtruncato, reliquis fere (equalibus . Man- 

 dibul(B apice subincurvatce. Labrum quadratum medio productum 

 subciliatum. Mentum transversum. Palpi maxillares ultimo ar- 

 ticulo subsecuriformi, oblique truncato. Palpi labiates ultimo ar- 

 ticulo fere trigono, valde securiformi. Thorax subquadratus an- 

 gulis posticis lateribusque rotundatis. Corpus gibbosum. Pedes 

 robusti, tibiis spinosis. 



Cyrtoderus Australasias. Niger, antennarum articulis tribus primis 

 piceis, reliquis pubescentibus ; thorace lined media 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. liji. 8, 

 lat. lin. 2|. 



Hydra DEPHAGA. 



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

 thorace sub lente subtilissime punctato, marginibus exterioribus 

 flavescentibus ; elytris nigris flavo-marginatis , disco binis lineis 

 punctorum haud fortiter impresso ; corpore infra nigro nitido, 

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

 lin. 8, lat. lin. 4^. 



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

 Hydaticus. 



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

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

 lin. 3J, lat. lin. 2. 



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

 convexo, lateribus utrinque fortiter depressis ; elytris subtilissime 

 punctulatis piceis, corpore infrd pedibusque concoloribus. Long. 

 Hn.lf, lat. lin. |. 



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

 cisque elytrorumquemargine flavo, elytris trispinosis, spina media 



* KvQTos and Be'^w. I know not where to place this genus ; it seems allied 

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

 received it from Melville Island. 



2 F2 



