152 Dr. A. G. Butler on the 



31. Delias cceneus. 



Papilio caneus, Linnaeus, Mus. Lud. Ulr. p. 271 (1764). 

 Papilio plexaris, Donovan, Ins. New Holland, pi. xviii. fig. 2 (1805). 

 Cathcemia anthyparete, Hiibner, Verz. bek. Schmett. p. 92 (1816). 

 Pirn's philyra, Godart, Enc. Meth. ix. p. 150 (1819). 



Amboina, Ceram. B. M. 



Nineteen examples, of which nine are from the God man and 

 Salvin collection. 



32. Delias philotis. 



Thyca philotis, Wallace, Trans. Ent. Soc. ser. 3, vol. iv. p. 357, pi. viii. 

 fig. 4 (1867). 



Bourou. Types coll. Hewitson. 



Hewitson united this species to D. cceneus, from which it 

 may be readily distinguished by the oblique inner edge of 

 the blackish area of primaries on the underside, leaving a 

 large white patch from median vein to inner margin. 



33. Delias argenthona. 



Papilio argenthona t Fabricius, Ent. Syst. iii. 1, p. 200 (1793). 

 . Pieris protocharis, Boisduval, Sp. G&i. Le"p. i. p. 457 (1836). 



Queensland, Port Denison, Richmond Eiver, More ton 

 Bay. B. M. 



Fourteen examples, eight of which are from the Godman 

 and Salvin collection. The Hewitson collection contains six 

 specimens. 



The specimen figured by me as Delias fragalactea (Lep. 

 Exot. pi. xxiv. fig. 7) is only a small example of this species ; 

 the white spot at end of discoidal cell in primaries on the 

 under surface is frequently confluent with the white of the 

 ground-colour in this species, and therefore cannot be 

 regarded as one of the distinguishing characters of D. fraga- 

 lactea. 



34. Delias fragalactea. 



Thyca fragalactea, Butler, Ann. & Mag. Nat. Hist. ser. 4, vol. iv. 

 p. 243 (1869), but not of Lep. Exot. 



N. Australia. Two examples. Type B. M. 



It is possible that this may eventually be linked to D. ar- 

 genthona] but the greater depth of the pale basal area on the 

 under surface of the secondaries, which encloses the red spot 

 and extends to the end of the cell, as also the heavier black 

 bordering of these wings on the upper surface, readily distin- 

 guish it at present from that species. Apparently the hind 

 wings are comparatively longer than in D. argenthona , there 



