146 Dr. A. G. Butler on the 



6. Delias niasana. 



Delias niasana, Klieil, Khop. Nias. p. 35, pi. iv. figs. 22, 23 (1884). 

 Yar. amarilla, ibid. t. c. 



Nias. Three examples. B. M. 



Two of the specimens are from the Goclman 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. Jiyparete^ but is quite easily separated from that species 

 by the form, pale edging, and number of the scarlet spots. 



7. Delias hyparete. 



Pajyilio hyparete, Linngeus, Mus. Lud. Ulr. p. 247 (1764). 

 Papilio autonoe, Cramer, Pap. Exot. ii. pi. clxxxvii. C, I) (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 submai-ginal scarlet spots on under surface of 

 secondaries, but not to any great extent. 



(S. Delias luzonensis. 



Pieris luzonensis, Feldev, Wien. ent. Monatsclir. vi. p. 285 (1862). 



Var. Delias palaicanica, Staudinger, Iris, ii. p. 24 (18S9). 



Vars. Delias mindanaensis, Mitis, Iris, vi. p. 189, pi. ii. tigs. 4,5(1893). 



Philippine Islands and Formosa. B. M. 



Eighteen examples, of which twelve were received from 

 the Godnian and Salvin collection. Hewitson also had four 

 other specimens. 



In its typical form I), 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 forms, 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 



