BY A. JEPFEKIS TUENEE. iM 



areole. Hindvvings with 12 approximated, connected, or anastomosing with cell 

 at one-fourth, occasionally approximated to or beyond middle. 



A small group which diverged early from the Notodontmae. It is easily 

 recognised by the combination of characters given, but with the doubtful excep- 

 tion of the abdominal tuft, none of these is by itself absolutely distinctive, hence 

 it cannot be maintained as a distinct family. The typical genus Cnethocampa 

 ranges from Europe to India. C. processioiia Lin. has remarkable larval habits, 

 which have been the subject of some classical observations by Fabre. The larvae 

 of Ochrogaster contraria form similar "processions." There is another Indian 

 genus, Gazalina Wlk., and several African genera. When the insect fauna of 

 the ancient "Austral Land," now represented by Western Australia, became isolated, 

 it contained species of this group, and these have since spread to the east, so 

 that they are now found in all parts of Australia, in which the subfamily is un- 

 usually well represented. 



1. Hindwings with 12 approximated to cell as far as or beyond 



middle 2. 



Hindwings with 12 diverging from cell at about one-fourth .... 4. 



2. Areole absent 3. Epicoma. 



Areole present 3- 



3. Areole small, 10 connate or stalked with 7, S, 9 8. Cynosarga. 



Areole large, 10 separate 9. Oenosand-a. 



4. Areole absent 5. 



Areole present 6. 



5. Hindwings with 12 anastomosing with cell 1. Trichetra. 



Hindwings with 12 not anastomosing 2. Axiocleta. 



6. Areole moderate, 7 arising from it separately 7. 



Areole small, 7 stalked with 8, 9 8. 



7. Forewings with 10 connate or stalked with 8, 9; hindwings with 



cell two-thirds 4. Tanystola. 



Forewings with 10 separate; hindwings with cell not exceeding 



three-fifths 5. Sthenadelpha. 



8. Palpi obsolete 6. Ochrogaster. 



Palpi short, porrect 7- Teara. 



Gen. 1. Trichetra. 



Arcturus, Curtis, Brit. Ent., 336 (praeocc). — Trichetra. Westw., Ins., ii., 

 1840, Generic Synopsis, p. 92. 



Palpi obsolete. Patagia long, reaching beyond thorax. Abdominal tuft in 

 c? very long. Posterior tibiae with terminal spurs very short, middle spurs 

 absent. ForewingB with 5 from middle of cell, 6 from upper angle, 7, 8, 9, 10 

 stalked, areole absent. Hindwings with 3 and 4 separate, 5 from slightly above 

 middle of cell, 6 and 7 stalked, 12 anastomosing with cell at about one-third. 



1. Trichetra sparshalii. 



Arcturus sparshalii, Curtis, Brit. Ent., 336. — Trichetra mesom.elas, Wlk., Cat. 

 Brit. Mus., iv., p. 845.— T. stibosma, But!., Cist. Ent., ii., 1877, p. 204.— 2". fra- 

 terna, Butl., ibid., p. 204. 



<S. 40-50 mm. Head white or grey; face often ochreous-tinged, lateral mar- 

 gins usually fuscous. Antennae white or gxey; pectinations ochreous-tinged. 

 Thorax white or grey, sometimes blackish in centre. Abdomen white, sometimes 

 blackish or grey on dorsum; tuft white or whitish-grey. Legs white; anterior 

 pair usually fuscous. Forewings narrowly triangular, costa straight to two-thirds, 



