482 Mr. L. de Nice*ville on ih 



Province Wellesley, Perak, Sumatra, Java, Borneo (Distant) ; 

 Northern Borneo, not common (Distant & Pryer) ; is rather 

 rare in North-eastern Sumatra, and occurs from Bekantschan 

 to the Central Plateau. Collectors never bring- in more than 

 two or three specimens at one time. We have specimens 

 caught from February to August only (de Niceville & 

 Martin) ; Perak, N.E. Sumatra, N. & S.E. Borneo (coll. 

 de Niceville). 



This is a very well-marked species. Mr. Distant has alone 

 recorded it from Java, where it is probably rare. 



4. Dercas Wallichii, Doubleday. 



Gonepteryx Wallichii, Doubleday, Proc. Ent. Soc. Loud. ser. 1, vol. v. 

 p. xlvi'i (1849). Rhodocera Wallichii, Butler, Proc. Zool. Soc. Loud. 

 1866, p. 452. Dercas Wallichii, Wallace, Trans. Ent. Soc Lond. 

 ser, 3, vol. iv. p. 398. n. 3 (1867). ? Dercas Wallichii, Elwes, Proc. 

 Zool. Soc. Lond. 1882, p. 402; id., Elwes, Trans. Ent. Soc. Lond. 1888, 

 p. 415. n.373; id., Swinhoe, Trans. Ent. Soc. Lond. 1893, p. 308. 

 n. 344; id., de Niceville, Gazetteer of Sikbim, p. 107. n. 432 (1804). 

 Gonepteryx urania, Butler, Proc Zool. Soc. Lond. 1865, p. 458. n. 5, 

 pi. xxvi. rig. 5, female. Dercas urania, Swinboe, Trans. Ent. Soc. 

 Lond. 1893, p. 308,. n. 340. 



Bab. North India (Doubleday) ; North India (Butler) ; 

 N. India (Wallace); Sikkim, Khasias (Elwes); many 

 examples, Khasia Hills (Swinhoe) ; Sikkim, Khasi Hills 

 (de Niceville) ; wrania, Northern India (Butler)} urania, several 

 examples, Khasia Hills (Swinhoe)', Lachung Valley in Native 

 Sikkim, Khasi PI ills, Upper Assam (coll. de Niceville). 



As far back as 1866 Dr. A. G. Butler sunk his G. urania 

 under Pi. Wallichii, in which he has been followed by all 

 writers except Col. Swinhoe, who in 1893 raises D. urania 

 to specific rank, and notes : — " Kirby puts it as a synonym of 

 the preceding [D. Wallichii], but I think it must be a good 

 species, having never seen any intermediates." The specimens 

 Col. Swinhoe refers to are probably D. decipiens, inihi, 

 and he could not have looked up the literature on these 

 species when he wrote this note. G. urania is undoubtedly 

 a synonym of D. Wallichii. The home of this species in 

 Sikkim has now been found, Herr Paul Movvis having ob- 

 tained many specimens through his native collectors from the 

 Lachung Valley. Mr. W. Doherty notes in Proc. Zool. Soc. 

 Lond. 1891, p. 251, that he obtained a large set of D. Wal- 

 lichii at or near Mao, Manipur, and that it is curiously like 

 Gonepteryx zaneka [not zaneeka], Moore, of the North-west 

 Himalayas. It flew in June and disappeared in July. 

 Through the kindness of Mr. H. J. Elw r es I have several of 

 these Manipuri specimens in my collection. Dr. Butler notes 



