KEY TO THE GROUPS— CHRYSALIS, 5o 



eighth abdominal segment scarcely 



perceptible 14. Eiujonia. 



j^ Tubercle just above spiracle-line on 

 eighth abdominal segment minute 



but distinct 15. Polygonia. 



E^ Base of wings marked by only a single tuber- 

 cle. 

 F'. Middle prominence of thorax very high and 

 strongly compressed. 

 (Tribe Sovereigns.) 16. Basilarchia. 

 F\ Middle prominence of thorax not highly 



developed (Tribe Emperors.) 



g\ Abdomen transversely ridged on the 

 fourth segment, with no longitudinal 



ridge 17. Ancea, 



g^. Abdomen longitudinally ridged along the 

 middle of the back, with no trans- 

 verse ridge 18. Clilorippe, 



C\ With no conspicuous prominences. 



D'. Back of abdomen with a transverse series of 



tubercles. 



(Subfamily Danaids.) 1. Anosia. 

 D\ Back of abdomen with no transverse series of 



tubercles. 



(Subfam. Satyrs or Meadow-Browns.) 

 e'. Front and lower planes of head forming less 

 than a right angle. 

 t\ Abdomen with a pair of distinct longitudi- 

 nal ridges 19. Cissia. 



f^ Abdomen with no longitudinal ridges. 

 g\ Abdomen beyond tip of wings as long as 



the wings 20. Satyrodes. 



g^ Abdomen beyond tip of wings shorter 

 than the wings 21. Enodia. 



