546 REVISION OF THE GENERA COLPOCHILA, ETC., 



The prothorax has no indication of a dorsal channel, and is 

 quite three-quarters again as wide as long ; its base (which is very 

 feebly convex hind ward all across) is distinctly less than half 

 again as wide as the front which is not bisinuate (as it is in most 

 species of Sericesthis), and is only moderately emarginate with 

 angles not much produced though sharp ; the sides are feebly 

 rounded, the hind angles much rounded off. The pygidium is not 

 at all strongly tumid. The tarsi resemble those of *S'. jjlaniceps but 

 are more slender and scarcely so long. 



S. Australia ; Woodville near Adelaide ; two male examples 



flew to light. 



Sericesthis micans, sp.nov. 



Minus elongata ; minus convexa ; sat nitida ; rufa, capita 

 prothorace elytrisque rufo-cseruleis ii-idescentibus ; capite 

 (hoc postice sat tumido) suVjtilius crebre (postice quam in 

 clypeo minus crebre), prothorace (hoc postice quam 

 antice plus dimidio latiori) crebre fortiter, elytris (his 

 4-geminato-striatis) sat fortiter minus crebre, pygidio sat 

 fortiter sat crebre, punctulatis ; clypeo antice rotundato 

 fortiter reflexo; subtus latera versus metasterno et coxis 

 posticis sparsim sat fortiter, abdomine minus fortiter vix 

 crebrius, punctulatis ; sternis femoribusque pilis elongatis 

 sparsissime vestitis; tibiis anticis extus acute tridentatis, 

 dente feraori proximo 2° multo minori ; tarsis minus robustis 

 minus elongatis subtus vix setosis ; tarsorum posticorum 

 articulo 1° 2° sat sequali ; antennis 8-articulatis ; flabello 

 {1 feminpe) stipite multo breviori ; segmento ventrali apicaii 

 postice truncato. [Long. 4^-5|^, lat. 2^-3^ lines. 



Var. (?) supra vix cserulea. 



The distinguishing characters of this species among those known 

 to me having their upper surface iridescent are the distinctly 

 bluish tone of the upper surface, in some examples entitling the 

 insect to be called a bright blue one, — and the close strong punc- 

 turation of the prothorax accompanied by an exceptionally sparse 

 puncturation of the sides of the raetasternum and hind coxae. 

 The prothorax is nearly twice as wide as long, its front angles well 



