and Gyrinidae of Australasia. 401 



Ovate, convex, somev^^hat elongate, of a pale-flavous colour : head 

 subelongate : thorax considerably constricted in front, more so than in 

 H. testudo ; at tlie base the breadth is twice the medial length, the 

 surface is subglobose, and thickly punctate both in front and along the 

 line of the base (the pimctures being very slightly darker in colour 

 than the surface, and not decidedly fuscous as in H. testudo) : elytra 

 convex, considerably broader in front than the base of the thorax, the 

 shoulders being somewhat more prominent than in the preceding 

 species ; from the base to the apex are eleven coarsely punctate striaj 

 (the eleventh being in one example almost obsolete) ; the punctures are 

 in colom* very slightly fuscous, while between the striae are distinctly 

 apparent irregularly aiTanged punctiu'es : leys and antennce flavous. 



This pretty species approaches nearly to H. testudo ; it is mani- 

 festly separated by its form (the humeral angles being more di- 

 stinct) and by the character of the punctuation of the thorax and 

 elytra. Both species entirely differ from species known to me from 

 other continents. 



Of the three examples before me of this species, one is from the 

 collection of the British Museum (the precise locality being unre- 

 corded), and two I received some years ago from Mr. Stevens, the 

 locality being " South Australia." 



3. H. fuseatus, n. sp. 



H. ovatus, subcylindricus, rufo-fuscus : thorace ad basin fortiter depress©, 

 pimctato; elytris ad humeros latis, leviter pimctato-striatis, punctis 

 rufo-fuscis (hand ut in H, yihbo uigro coloratis) ; anteunis pedibusque 

 rufo-fuscis. 



Long. Corp. 1^ lin., lat. f lin. ' 



Ovate, broad, somewhat cylindrical, attenuated towards the apex, 

 of a rufo-fuscous colour : head, when seen imder a high power, finely 

 pimctate towards the base : thorax transvei"se, considerably constricted 

 towards the apex, the sides being in outline rectilinear, the surface 

 along the line of the base is considerably depressed, which gives to the 

 disk (when viewed laterally) a distinctly globular form; this lateral 

 depression of the base is even more apparent when viewed in front ; 

 the surface is coarsely and sparingly pimctate throughout : the 

 elytra, broad, somewhat parallel, when viewed from above the line of 

 the shoulder, form a distinct angle with that of the thorax (the thorax 

 at its base appearing somewhat constricted) ; ten stria?, consisting of 

 small and evenly an-anged punctures, are faintly coloured with fuscous, 

 the lateral striae being in pimctation and colouring more irregular: 

 leys and antennce rufo-fuscous. 

 This and the following species present a peculiarity of form in the 



striking basal depression of the thorax. The species before us dift'crs 



