1899.] li. de Nicevillc— Jy/s/ of the But terjliea of Ceylon. 213 



152. Terias siLHETANA, Wallace. 



Ur. Moore does not record T.silhetana from Ceylon, but gives T. citrina^ 

 Moore, which is a dry-season foim, T. rof,undularis, Moore, a wet-season 

 form, T. uniformis, Moore, also a dry-season form, and T. templetoniij 

 Butler, also a wet-season form. The butterfly is common iti tlie middle 

 and lower hill districts, l)ut is only found rarely at the sea-level. It 

 varies much in size, markings and in the form of the wings. T. citrina 

 has always (?) three spots in the discoidal cell of the forewing on the 

 underside exclusive of the reniform markings on the disco-cellular 

 nervules, and sometimes has and at other times lacks an ochreous apical 

 marking. A larger dry-season form 1 75 inches in expanse has a 

 well-developed and almost square ochreous patch at the apex of the 

 forewing on the underside, with the usual thiee spots in the cell. In 

 one specimen iu Manders' collection one of these spots (the basal one) 

 is almost obsolete. The form T. rotundularis may be known by the 

 more rounded shape of all the wings, which gives it a peculiar facies, 

 so much so that Mr. Mackwood is strongly biased in favour of its 

 being a distinct species. Mr. Ormiston of Kalupahani recently informed 

 us that from one batch of eggs (whether laid by the same parent or 

 not is unknown) he has bred all the above forms. Iu Ceylon the larva 

 feeds on Alhizzia Moluccana and is gregarious. 



153. TiiR[AS SARI, Horsfield. 



Recorded by Dr. Butler from Ceylon, the Nilghiris, Burma, the 

 Mergui Archipelago, Malacca, Sumatra, Java, Borneo, the Sulu 

 Archipelago, and Palawan. We have specimens only from Sumatra, 

 Java, Banka and Borneo. Dr. Moore also omits it from Ceylon. Watson 

 says " T. sari is a very constant and easily recognisable species : it has 

 on the underside only a single wavy line in the discoidal cell of the 

 forewing, in addition to the usual disco-cellular markings, and the whole 

 of the apex widely and evenly chocolate-brown, and also has a more or 

 less diffused dark spot towards the outer angle." 



154. IxiAS ciNGALENSis, Moore. 



Moore as I. cingalensis and I. pirenassa, Wallace. In describing the 

 latter Wallace wrote " Male, costamuch curved, hind wing subtriangular. 

 Upperside, both wings like ' Thestias ' pyrene, Linnaeus [wliich he 

 restricts to N. India, Bengal, China], but the transverse black band 

 always touches the discoidal spot of the forewing." Its habitat he 

 gives as Bombay and Madras. Moore appears to have kept the two 

 species separate chiefly because L cingalensis has the underside uni- 

 formly yellow without markings, while I. pirenassa is considerably 



