and Gyrinidos of Australasia. 409 



the surface is more distinctly punctate, iu colour flavo-nifous, the 

 medial posterior disk being black ; this medial marking varies in extent 

 in difSjrent examples, and sometimes contains within itself a basal 

 circular flavous patch : eli/tra very finely and thickly punctate, in 

 coloiu' black; from the humeral angle proceeds an iri'egular flavous 

 marking obliquely towards the suture, behind which also is another 

 irregular transverse flavous marking ; the margin is also more or less 

 distinctly flavous; in some examples these markings are severally 

 absent, and in some few examples they are all entirely absent, the 

 elyti'a being wholly black : legs and atitenncs rufo-flavous. 



This pretty species is subject to considerable variation in colour ; 

 it appears to be a veiy common species near Adelaide. In the 

 collections of the British Museum, R. Bakewell, Esq., and the Rev. 

 H. Clark. 



5. H. Thoreii, n. sp. 



H. ovatus, valde pmictatus, rufo-flavus ; thorace punctidato, nigro mar- 

 ginato ; elytiis rufo-fuscis, quinque flavis stiiis undique ornatis, sub- 

 pubescentibus. 



Long. Corp. 1a lin., lat. f lin. 



Ovate, broad, thickly punctate throughout, rufo-flavous : head im- 

 punctate : thorax very finely punctate ; when seen through a fine lens, 

 somewhat more distinctly punctate at the base, narrowly margined 

 with black : elytra very finely punctate, in colom- rufo-fuscous, with 

 five pai'allel longitudinal flavous lines extending from the apex to the 

 base ; the surface, when viewed obliquely, is seen to be finely clothed 

 with pubescence : leys and antennce flavous. 



A single specimen has been forwarded to me by M. Thorey, of 

 Hamburg, to whom I am indebted for several interesting species of 

 this group, with the locality " Tarangoo, Nov. Holland." 



6. H. gigas, Boheman (' Eugenics, Resa, &c.,' Stockholm, 

 1858, p. 18). 



H. oblongo-ovalis, modice convexus, supra niger, subnitidus, creberrime 

 punctulatus ; capite medio, palpis, antennis, corpore subtus pedibusque 

 testaceis ; prothorace lateribus anguste ferrugineo-marginatis ; elytris 

 breviter cinereo pubescentibus, fascia insequali basali maciUisque 

 quatuor pone medium flavo-testaceis omatis. 



Long. G|, lat. 3^ mill. 



Patria Nova Hollandia {Sydney). 



Caput superne parima convexum; prothorax longitudine diiplo et 

 dimidio latior, apice subtruncatus, utrinque leviter sinuatus, lateribus 

 tenuiter reflexo-marginatis, angulis anticis promiuulis acutis, posticis 

 rectis, superne parum convexus, niger, nitidus, extrorsum ang^^ste rufo- 



