606 DESCRIPTIONS OF AUSTRALIAN MICRO-LEPIDOPTERA, 



1. Forewings with dark markings from inner 



margin 2. 



Forewings without dark markings from inner 



margin 6. 



2. Hindvvings white 196. stiriella. 



Hindwings not white 3. 



3. Forewings with anterior fascia formed by 



two triangular sj)ots 200. xenodoxa. 



Forewings with anterior fascia not formed 



by triangular spots 4. 



4. Anterior fascia straight 199. diorthota. • 



Anterior fascia angulated 5. 



5. Forewings with two angulated fasciae 198. chalinias. 



Forewings with one angulated fascia 197. gephyraea. 



6. Forewings with grey subbasal streak in hind- 



marginal cilia 194, basilissa. 



Forewings without grey subbasal streak in 



hindmarginal cilia 195. orestias. 



194. Op. basilissa, n.sp. 



9. 11-15 mm. Head, palpi, antennae, thorax, and abdomen 

 white. Legs white, anterior pair and all tarsi more or less 

 infuscated. Forewings elongate-lanceolate, apex produced ; snow- 

 white ; a light yellow-ochreous streak along upper half of hind- 

 margin to apex : cilia white, with two fine suberect black bars 

 above apex, a small black subbasal spot and blackish hook at 

 apex, and a subbasal grey streak along hindmargin, interrupted in 

 middle. Hindwings light grey ; cilia white, sometimes ochreous- 

 tinged. 



Deloraine, Tasmania ; Perth, West Australia ; in October and 

 November, two specimens. The larger of these is quite gigantic 

 for this genus. 



195. Op. orestias, Meyr. 



(Opostega orestias, Meyr,, Proc. Linn. Soc. N.S.W. 1880, 175.) 



