COLIIN^. 119 



Mas Vollenlwvii, Thestias Vollenhovii, Wallace, Trans. Ent. Soc. 1867, p. 393. Butler, Ann. Mag. 



Nat. Hist. 1898, p. 135. Synonym, Thestias Venatrix, Wallace, I.e. p. 393. Ixias Venatrix, 



Butler, Proc. Zool. Soc. 1871, p. 254, pi. 19, fig. 1, ^. Habitat, Java; described in error by 



Wallace as from Maulmein. 

 Ixias undaius, Butler, Proc. Zool. Soc. 1871, p. 252, pi. 19, fig. 4, $. Druce, Proc. Zool. Soc. 1873, 



p. 356. Butler, Ann. Mag. Nat. Hist. 1898, p. 137. Habitat, Borneo. 

 Ixias verna, Druce, Proc. Zool. Soc. 1874, p. 108, pi. 16, figs. 5, 6, (J 9 • Habitat, Siam. 

 Ixias Insignis, Butler, Cistula, Entom. ii. p. 431, pi. 8, fig. 1, $ (1877); id. Ann. Mag. Nat. Hist. 



1898, p. 137. Habitat, Formosa. 

 Ixias Birdii, Distant, Ann. Mag. Nat. Hist. 1883, p. 351 ; id. Rhop. Malayana, p. 309, pi. 26, 



fig. 4, $ (1885). Butler, Ann. Mag. Nat. Hist. 1898, p. 137. Habitat, Malay Peninsula. 

 Idas Flavijpennis, Grose-Smith, in Forbes' Nat. Wanderings, p. 275 (1885). Butler, Ann. Mag. Nat. 



Hist. 1898, p. 135. Thestias Flavipennis, Snellen, Tijd. voor Ent. 1891, p. 335, pi. 16, 



figs. 1, 2, ^, 3, 4, ?. Synonym, Ixias Pyrites, Weymer, Stett. Ent. Zeit. 1886, pi. i. fig. 4, J; ; 



id. 1887, p. 13. Habitat, Sumatra. 

 Ixias Yunnanensis, Fruhstorfer, Soc. Entom. 1902, p. 81, ?. Habitat, Yunnan. 

 Ixias Malum-Sinicum, Thieme, Berl. Ent. Zeit. 1896, p. 408. Habitat, Nias. 



Note. — As regards China, this genus seems to be confined to the south ; no 

 mention of it is made by Leech in his Butterflies of China, Japan and Corea. 



This practically ends Dr. Frederick Moore's contribution to these volumes ; for 

 the remainder I have his notes to go on ; it is a very great pity he did not live to 

 finish the entire work, the compilation of his lifetime ; his notes are innumerable, and 

 refer to the whole of the Heterocera as well as the Rhopalocera ; his knowledge of the 

 Lepidoptera of the Indian Region was very great ; he was the father of all Indian 

 Lepidopterists, always patient, kindly and courteous, never sparing time or trouble in 

 helping workers who came to him for assistance ; his industry was prodigious, his 

 Books and Memoirs on the Indian Lepidoptera extend over a long period of years, 

 many of them will remain as standard works ; his Monograph of the Limnaina and 

 Euplceina, published in the Proceedings of the Zoological Society, 1883, is a classic; 

 his division of the difierent genera, though misunderstood by ordinary Collectors, was 

 almost at once adopted by all scientific Lepidopterists in Germany, and is now 

 universally adopted. 



I must, of course, continue the work on Dr. Moore's lines, otherwise I should adopt 

 the excellent trinomial system used by Messrs. Rothschild, Hartert, and Jordon ; so 

 much nonsense has been written about the multiplicity of names, and as to what is, or 

 is not a species, the trinomial system seems to be necessary to show Collectors that, 

 because a name is given to an insect, it does not mean that this insect represents a 

 distinct species ; the study of variation and of local and seasonal forms is the very 

 essence of the theory of evolution, and for the sake of convenience, if for nothing else, 

 every form must have a name : as I cannot use the trinomial system, I will endeavour 

 to put the typical species first and follow on with the allied forms. 



