152 Dr. A. G. Butler on the 
31. Delias ceeneus. 
Papilio ceneus, Linneeus, Mus. Lud. Uly. p. 271 (1764). 
Papilio plexaris, Donovan, Ins, New Holland, pl. xviii. fig. 2 (1805). 
Cathemia anthyparete, Hiibner, Verz. bek. Schmett. p. 92 (1816). 
Pieris philyra, Godart, Enc. Méth. ix. p. 150 (1819). 
Amboina, Ceram. B. M. 
Nineteen examples, of which nine are from the Godman and 
Salvin collection. 
32. Delias philotis. 
Thyca philotis, Wallace, Trans. Ent. Soe. ser, 3, vol. iv. p. 357, pl. viii. 
fic. 4 (1867). 
Bourou. Types coll. Hewitson. 
Hewitson united this species to ). cwneus, 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, Fabricius, Ent. Syst. iii. 1, p. 200 (1793). 
©. Pieris protocharis, Boisduval, Sp. Gén. Lép. i. p. 457 (1836). 
Queensland, Port Denison, Richmond River, Moreton 
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. pl. 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 
