434 LIETJT.-COL. C. SWINHOE ON LITTLE-KNOWN [Juue 17, 



61. Ardea SUMATRANA, Raffles. 



62. Herodias alba, L. 



H. torra (B. Ham.), Meyer, op. sup. cit. 



63. Demigretta sacra, Gm. 



64. Nycticorax caledonicus, Gm. 



65. PoRPHYRio melanopterus, Teirm. 



VIII. NATATORES. 



66. Nettapus pulchellus, Gould. 



67. Dendrocygna guttata, Miill. 



68. Tadorna radjah, Gam. 



69. Onychoprion an^sthetus. Scop. 



8. On some New and Little-known Species of Butterflies of 

 the Genus Teracolus. By Lt.-Col. C. Swinhoe, F.L.S., 



r.z.s. 



[Eeceived June 14, 1884.] 

 (Plates XXXIX. & XL.) 



The Butterflies of the genus Teracolus of which this paper treats 

 are very rare in collections ; even the National collection contains but 

 a poor lot of Asiatic specimens. The insects are of a very delicate 

 nature, very difficult to capture without injury, and consequently 

 many of the few specimens to be found in collections are represented 

 by mere fragments. 



These beautifully coloured delicate insects are, in the few species 

 yet known, so much like one anotlier, that many lepidopterists are 

 inclined to club them together, and this more particularly with 

 reference to the different species in the groups of Teracolus faustus, ■ 

 T. danae, and T. vestalis, and indeed,- until the appearance of 

 Mr. Butler's revision of the genus in our 'Proceedings' in January 

 1 876, the whole T. vestalis group, a perfectly distinct group of 

 which there are many species, appear to have been looked upon as 

 the females of T. phisadia of Godart. The only four species of 

 the T. vestalis group yet described have been described by Mr. 

 Butler. 



The real home of this genus is the sandy desert, and it is a most 

 extraordinary fact that, the worse the locality, where nature is a barren 

 wilderness of nothing but intense heat and sand, the more beautiful 

 are the species to be found there, many of them having patches of 

 most brilliant golden orange — regular sun-patches, just as if these 

 patches had been burnt into their wings by the sun. 



I have here referred to and described 22 species in all, 16 of 



