792 REVISION OF AUSTRALIAN LEPIDOPTERA, 



HYDRIOMENIDAE. 



Forewings with vein 10 anastomosing with 9, rising out of or 

 anastomosing with 11. Hindwings with vein 5 present, 8 anas- 

 tomosing with upper margin of cell from near base to near end of 

 cell. 



The anastomosis of veins 9, 10, 11 of forewings forms an 

 auxiliary cell, which is hereinafter called the areole ; if 10 rises out 

 of 11, the areole is simple, if it rises separate, doul^le. Vein 6 of 

 the forewings sometimes rises out of 7, and I formerly employed 

 this as a distinctive point, but on examination of many specimens 

 I find that it is so often variable within the limits of the same 

 species that it is not available in this family. Rarely the posterior 

 wall of the areole is obsolete through non-development ; this 

 apparent abnormality is explained beneath (cf. Hydriomena 

 phaedra). 



The following is a tabulation of the genera : — 



1. Thorax roughly hairy beneath 19. Dasyuris. 



Thorax not hairy beneath 2. 



2. Posterior tibise without median spurs 3. 



Posterior tibiae with median spurs 5. 



3. Tongue absent ; antennae in $ pectinated 16. Anomocentris. 

 Tongue present ; antennae in (J simple 4. 



4. Face with scale-cone ; hindwings in ^ 



simple 1 • Gymtioscelis. 



Face smooth ; hindwings in ^ lobed and 



folded 6. Remodes. 



5. Antennae in ^ pectinated 6. 



Antennae in ^ simple 7. 



6. Forewings with vein 7 out of 8 18. Xanthorhoe. 



Forewings with vein 7 separate from 8.. .. 17. Acodia. 



7. Areole simple 8. 



Areole double 13. 



