150 Dr. A. G. Butler on the. 



20. Delias glauce, 



S. Pieris glauce, Butler, P. Z. S. 1865, p. 431, pi. xxv. fig. 2. 



Borneo. Type, B. M. 



This species chiefly differs from the preceding in the 

 absence of the subapical yellow markings from the under 

 surface of the primaries. It is said to be common in Sumatra. 



21. Delias inferna. 



Delias inferna, Butler, Lep. Exot. p. 63, pi. xxiv. fig. 6 (1871) ; Grose 

 Smith & Kirby, Rhop. Exot., Del. pi. ii. figs. 3-G. 



Type N.W. Australia ; two males and two females, Cape 

 York and Port Moresby. B. M. 



Twelve examples, of which ten are from the Godraan and 

 Salvin collection. Hewitson also possessed a pair which he 

 mixed up with D. aruna. 



22. Delias aruna. 



cJ. Pieris aruna, Boisduval, Vov. de I'Astr., L^p. p. 48 (1832) ; Hewit- 

 son, Exot. Butt, ii.. Pier. pi. in. figs. 20-22 (1861). 

 2 . Pieris bajura, Boisduval, /. c. 



Two males and one female, Humboldt Bay ; male, Bat- 

 chian ; male, Waigiou. B. M. 



From the Godman and Salvin collection ; there are also two 

 males and a female in the Hewitson collection from Batchian 

 and Waigiou. 



23. Delias Honrathi. 



$ . Delias Honrathi, Mitis, Iris, vi. p. 134, pi. iii. fig. 1 (1893). 



Ralum, New Pomerania. 



This may turn out to be only a dimorphic form of the 

 female of D. madetes, from which it principally differs in the 

 white instead of yellow ground-colour of the upper surface 

 and in having most of the spots on the under surface of the 

 primaries white. 



24. Delias madetes. 



Pieris madetes, Godman & Salvin, P. Z. S. 1878, p. 733. 



Male and female, types (coll. G. & S.) ; male and female, 

 New Ireland. B. M. 



25. Delias diaphana. 



Delias dtaphana, Semper, Verb. Hamb. iii. p. 114 (1878): Reis. Phil. 

 V. p 228, pi. xxxiv. figs. 3-6 (1890). 



Mindanao and Davao. B. M. 



