400 Rev. H. Clark on the Dytiscidse 



and, especially, Mr. Bakewell. The following pages will include, pro- 

 bably, nearly every species that has as yet been brought in collections 

 to this country. It will be seen that nearly all that we know as yet 

 of the fauna of that vast continent is furnished by the neighbour- 

 hood of Melbourne, which has been so carefully examined by Dr. 

 Howitt and Mr. Bakewell. 



Family Dytiscidae. 

 Tribe I. Haliplid^. 

 Genus Haliplits, Latr. . 



1. H. testudo, n, sp. 



H. ovatus, subelongatus, pallide fen-ugineis ; thorace antice constricto, ad 

 basin et antice fortiter nigro punctato ; elytris nigro striatis ; anteunis 

 pedibusque pallide fiuTugiueis. 



Long. Corp. 2 lin., lat. 1 lin. 



Ovate, somewhat elongate, convex, of a pale-ferruginous coloiu-: 

 head narrow, subelongate, impunctate ; eyes large : thorax ti-ansverse, 

 at the base nearly twice the breadth of the medial length, the sides are 

 veiy slightly roimded, and very much constricted towards the front ; 

 the sm-face at the base is medially somewhat depressed, and impressed 

 with two or three irregular rows of coarse black pimctiu-es ; the an- 

 terior margia is also medially more or less distinctly punctm-ed : 

 elytra ovate, the outline being broadly dilated near to the thoracic 

 angle (the greatest breadth being in front of the middle of the insect) ; 

 the surface is marked by ten deeply pimctured striae, of which eight 

 are perceptibly marked by dark lines from the apex to the base (the 

 two lateral striae being micoloured) : legs and antenna pale ferru- 

 ginous. 

 H. testudo may be separated from H. australis by the manifest 



coloration of the thoracic punctures and also of the strise of the 



elytra ; in H. testudo the interstices between the striae are Isevigate, 



and not sparingly punctate as in H. australis. 



This species does not appear to be abundant. The four examples 



before me (all fairly uniform in colour and striation) are from the 



neighbourhood of Moreton Bay. 



In the collections of the British Museum, Mr. Bakewell, Mr. 



Waterhouse, and the Rev. Hamlet Clark. 



2. H. australis, n. sp. 



H. ovatus, convexus, subelongatus, pallide flavus ; thorace antice con- 

 stricto, ad basin et antice punctato ; elytris puuctato-striatis et inter 

 strias punctatis ; anteunis pedibusque flavis. 



Long. corp. l|-2 lin., lat. 1 liu. 



