92 



porrected, loosely scaled. Spurs very short. Forewings with 2- 

 from about f , 4 and 5 approximated at base, 7 out of 8 below 10 ; 

 9, 10, and 11 out of 8. Hindwings with vein 4 absent, 3 and 5 

 separate at base, 6 absent. 



The neuration resembles Choromeles, Meyr., but the antennae 

 are non-pectinated. 



Syntomis angustipenna, Lucas. 



Hydrusa angustipenna, Lucas, Proc. Linn. Soc, N.S.W., 1889. 



Male and female, 23-27 mm. Head and face black, collar 

 orange. Antennae wholly black. Thorax black. Abdomen 

 orange, bases of segments broadly black, two apical segments and 

 anal tuft wholly black. Forewings blackish, spots rather small, 

 semi-transparent, dull orange ; basal spot absent ; second wedge- 

 shaped, with apex obtuse, anterior ; third trapezoidal or triangu- 

 lar ; fourth elongate, sometimes surmounted by a small dot ; 

 connecting spot absent ; fifth roundish, fairly evenly bisected. 

 Hindwings black with a roundish basal orange spot. 



In the females the spots are rather larger than in the males. 



Brisbane. 



HYDRUSA, Walker. 



Tabulation of Species. 



1. Abdomen wholly orange 

 Abdomen not wholly orange 



2. Forewings wholly black without spots 

 Forewings with spots present 



3. Anal tuft black 

 Anal tuft orange 



4. Forewings with spots colourless 

 Forewings with spots more or less orange 



5. Thorax with orange spots 

 Thorax wholly black 



6. Connecting spot between fourth and fifth completely 



developed (as long as fifth) 

 Connecting spot absent or only partially developed (less 

 than half fifth) ... 



7. First and third spots wholly confluent 

 First and third spots separate 



8. Spots large, those of hindwings wholly confluent 

 Spots small, those of hindwings touching only ... 



9. Patagia partly yellowish 

 Patagia wholly black 



10. Antennse with apex white 

 Antennae wholly black 



11. Abdomen with last two or three segments wholly black 

 Abdomen with last two or three segments not wholly 



black 



12. Abdomen wholly black beneath, or with only a few 



orange scales 

 Abdomen with orange markings beneath 



xanthosoma 



2 



3 



4 



bicolor 



eschatias 



5 



6 



pyrrhoderck 



hyalota 



11 



8 



9 



ecliptis 



lampetis 



chlorometis 



10 



stdotis 



sphenophora 



12 



14 



cyanura 

 13 



