BY T. P. LUCAS. 1099 



and alternately orange and black on tibice. Forewings elongate- 

 triangular, gently dilate, costa nearly straight, hindniargin 

 rounded, green-grey, with marks and shadings of grey and black 

 in various shades ; spot in centre near base, a larger one at ^ costa, 

 a broader and diffused one immediately beyond on costa, a smaller 

 just beyond in middle and one nearer base on inner margin — a 

 broad fascia from J costa deeply dentate to ^j inner margin, 

 widened at inner margin, a discal spot at ^ near costa, a 2nd 

 fascia at § costa sinuous and dentate to t inner margin, a broad 

 suffusion from just beyond to apex, on inner half of wing nar- 

 rowed to interrupted horseshoe dots, to anal angle of hindmargin ; 

 a sub-marginal line of deep black dots, a marginal black-grey line : 

 cilia black-grey. Hindwings with hindmargin rounded, costa for 

 I and whole inner margin rich orange colour, rest of wings 

 coloured as forewings but with more white : spot near base of 

 costa orange, large spot in middle of wing at ^, and a band from 

 near costa just before sub-marginal spots on middle f of wing, 

 blue-white : a suffused line near base in centre and between 

 costal orange and white, centre spot green-grey ; a fascia at h 

 between orange bands and bounded faintly on either side with 

 orange-black : a broad suffusion from apex of costa, breaks at ^ 

 into horseshoe spots on inner- side of white band and expands 

 in suffusion near anal angle, black : sub-marginal spots deep 

 black ; cilia as forewings. 



Brisbane ; rare ; dense scrub. 



This handsome species comes near B. carinentalis. 



Postscript, — Since this paper left my hands I have come to the 

 conclusion that it might perhaps be better to consider the fore- 

 going species (5. arctandalis) as a well-marked variety of B. 

 didymalis, Walk. It does not entirely agree with Walker's 

 description in which the markings on the under side are said to 

 be obsolete, whereas in my species (or variety) the under surface 

 is rich orange, and the markings deep black. 



