778 REVISION OF AUSTRALIAN LEPIDOPTERA, 



first small, round ; second suboval ; third diamond-shaped ; fourth 

 elongate, narrow ; fifth roundish. Hind wings greenish-black ; 

 spots hyaline, colourless ; first roundish, almost wholly beneath 

 lower median vein ; second roundish, upper section very small. 

 Cape York, Queensland ; one specimen (Coll. Macleay). 



122. Hydr. leucacma, n. sp. 



£ 2 33-42 mm. Head orange; a transverse line between an- 

 tenna? dark fuscous. Antennae black, tip white. Thorax blue-black, 

 with a posterior orange spot. Abdomen iridescent-orange, base of 

 segments blue-black, three apical segments wholly blue-black. 

 Forewings black ; spots moderate, semitransparent, pale dull 

 orange ; first rather small, subquadrate ; second irregular ; third 

 diamond-shaped, upper angle truncate ; fourth very elongate, 

 sometimes surmounted posteriorly by a dot : fifth subcordate. 

 Hind wings black ; first spot very small, cloudy, or obsolete ; 

 second moderate, semitransparent, tinged with dull orange, sub- 

 cordate, unevenly bisected. 



Cairns, Queensland ; four specimens (Coll. Lucas and Macleay). 



123. Hydr. cyanura, n. sp. 



^. 30 mm. Head orange, with a few dark fuscous scales 

 between antennae. Antennae black. Thorax black, posteriorly 

 with a few orange scales. Abdomen orange, base of segments 

 black, ventral surface black throughout, three apical segments 

 wholly black. Forewings black; spots moderate, semitransparent, 

 tinged with pale dull orange ; first rather small, subquadrate ; 

 second elongate-trapezoidal ; third diamond-shaped, upper angle 

 truncate ; fourth very elongate ; fifth subcordate. Hindwings 

 black ; spots semitransparent, tinged with pale orange ; first 

 rather large, subquadrate, nearly touching base, reaching from 

 inner margin to lower median vein, suffused with orange beneath ; 

 second moderate, rounded-triangular, unevenly bisected. 



Thursday Island, Torres Straits ; one specimen (Coll. Lucas). 



