146 Dr. A. G. Butler on the 
6. Deltas niasana. 
Delias niasana, Kheil, Rhop. Nias. p. 35, pl. iv. figs. 22, 23 (1884). 
Var. amarilla, ibid. t. ¢. 
Nias. Three examples. B. M. 
Two of the specimens are from the Godman and Salvin 
collection. The species is a well-marked one, having the 
yellow on the under surface of the secondaries of a bright 
primrose tint, the submarginal scarlet spots almost enclosed 
in black and with pale edges; it approaches more nearly to 
D. hyparete, but is quite easily separated from that species 
by the form, pale edging, and number of the scarlet spots. 
7. Delias hyparete. 
Papilio hyparete, Linnzeus, Mus. Lud. Ulr. p. 247 (1764). 
Papilio autonoe, Cramer, Pap. Exot. ii. pl. clxxxvii. C, D (1779). 
Assam, Penang, Borneo, Sumatra, and Java. B. M. 
Thirty-four examples, of which thirteen are from the God- 
man and Salvin collection. The species varies chiefly in the 
size of the submarginal scarlet spots on under surface of 
secondaries, but not to any great extent. 
8. Delias luzonensts. 
Pieris luzonensis, Felder, Wien. ent. Monatschr. vi. p. 285 (1862). 
Var. Delias palawanica, Staudinger, Iris, ii. p. 24 (1889). 
Vars. Delias mindanaensis, Mitis, Ivis, vi. p. 159, pl. ii. figs. 4, 5 (1893). 
Philippine Islands and Formosa. B. M. 
Eighteen examples, of which twelve were received from 
the Godman and Salvin collection. Hewitson also had four 
other specimens. 
In its typical form LD. luzonensis nearly resembles the 
darker examples of D. hyparete from Java (D. autonoe), but 
is at once seen to differ in the greater obliquity of the inner 
edge of the blackish apical patch, owing to its being carried 
backwards to the end of the discoidal cell; also (on the 
under surface) in the broader black border of secondaries, 
which completely encloses the scarlet submarginal spots, and 
the much greater extent of yellow on these wings. The 
species is very variable, easily divided into five torms, as 
follows :— 
1. Typical form, with blackish apical patch to primaries 
streaked above with grey between the veins; secondaries 
below with six scarlet spots.—Luzon, Manilla, and Formosa. 
2. Secondaries below with the second and third spots 
