192 THE PROCEEDINGS OF THE LINNEAN SOCIETY 



margin, ending abruptly just before hindmargin ; from the point 

 of deflection proceeds a second branch similar and nearly parallel 

 to the first, but more slender and sometimes in great part obsolete ; 

 from half-way between origin of this branch and base rises a 

 third very slender branch, proceeding nearly to anal angle, but 

 generally obsolete a,t extremity ; the interspaces between these 

 branches are somewhat suffused anteriorly with blackish ; im- 

 mediately above the point of deflection of the median streak, but 

 not touching it, rises a moderately broad, basally attenuated, 

 silvery- white blackish-margined streak proceeding directly towards 

 hindmargin, but ending abruptly before reaching it ; above this 

 is sometimes also a faint whitish short linear mark ; a white sub- 

 marginal streak from apex to anal angle, inwardly convex, not 

 touching hindmargin, receiving the apices of all the discal streaks, 

 broadest above, sometimes obsolete or absent on its lower half, 

 internally edged with fuscous shading ; immediately before and 

 parallel to this submarginal streak is sometimes a wavy pale 

 bluish line ; hindmarginal line dark fuscous, with three or four 

 elongate black dots towards anal angle ; cilia white, tips and a 

 strong parting-line (sometimes confluent) dark metalUc-grey. 

 Hindwings whitish-grey, apex and hindmargin rather abruptly 

 darker grey, hindmarginal line fuscous ; cilia white, with a faint 

 grey parting-line near base. 



Allied to the three succeeding species, difi'ering especially by 

 the median streak having only two branches beneath, instead of 

 three or four. Not very common, but very widely distributed, 

 occurring at Sydney, and on the Clarence River ; near Melbourne 

 and Adelaide, and in Tasmania ; in March. 



Or. opulentellus Z, Gr. 46. 



11 J"-12|". Head greyish-ochreous, with a rather broad whitish 

 line above each eye. Labial palpi more than twice as long as 

 head, fuscous, beneath whitish at base ; maxillary palpi whitish, 

 towards base fuscous. Antennae dark fuscous. Thorax ochreous, 

 darker above, with a slender white longitudinal line on each side 

 of back, forming two conspicuous approximated white spots be- 

 hind the collar. Abdomen vvhitish-ochroous, more sufiused with 



