1895.] L. de Niceville & Dr. L. Martin — Butterflies of Sumatra. 497 



to quite a different group, T. tola being of the hecabe group. Described 

 from two males and one female. 



542. Terias andersonit, Moore. 



This also appears to be allied to T. sari, Horsfield, the males are the 

 same size, the "male-mark" is the same, not as in the preceding 

 species, it agrees with T. sari also in the markings of the discoidal 

 cell of the fore wing on the underside ; differing, however, in its paler 

 colour, though it is not as pale as the preceding species; in having 

 on the underside of the forewing either no apical brown patch or a very 

 small linear one, and no oblique brown marking at the outer angle as 

 T. sari has. The cilia is black as in T. sari. It differs only from the 

 types of T. andersonii now before me in its usually rather larger size 

 and somewhat paler coloration on both surfaces. One specimen agrees 

 in all respects with Distant's figure of T. senna, Felder, Rhop. Malay., 

 pi. xxv, fig. 14, female, in having the markings of the underside entirely 

 obliterated. 



543. Terias hecabe, Linnaeus. 



Hagen. Snellen. Grose Smith. Wallace. Distant. This species 

 has been well figured by Snellen in Midden-Sumatra, Lepidoptera, pi. i, 

 figs. 6, 7 male [nee female] type (1892), see his Index to the Plates, p. 85. 

 According to Cnpt. E. Y. Watson (Journ. Bomb. Nat. Hist. Soc, vol. viii, 

 p. 509 (J894), T. hecabe may be known by never having "More than two 

 streaks or spots in the discoidal cell on the underside of the forewing in 

 addition to the reniform spot on the disco-cellular nervules." He has 

 identified for me from Sumatra both the rainy-season form (true 

 T. hecabe and T. hecabeoides, Menetries), which has "No apical brown patch 

 on the underside of the forewing," and the dry-season form (T. excavata, 

 Moore), which has at the " Apex of the forewing on the underside a 

 more or less strongly pronounced brown patch." Seasonal forms in 

 Sumatra, are, I believe, quite unknown, so perhaps, as in the case of 

 Melanitis ismene, Cramer, the two forms, dry and wet, which ai'e seasonal 

 in India, occur together and without any reference to the dryness or 

 humidity of the atmosphere in Sumatra. T. hecabe is numerically by 

 far the commonest species of the genus in Sumatra, and Capt. Watson 

 has kindly identified six different varieties of it for me, some of which 

 he names T. hecabeoides, Menetries, T. excavata, Moore, T. sioinhoei, 

 Butler, T. patruelis, Moore, and T. merguiana, Moore. It would, I 

 think, serve no useful purpose in our at present very superficial and 

 inadequate knowledge of the genus as represented in the Malay Archi- 

 pelago to define precisely all these varietal forms, some of which may 

 perhaps be distinct species. It remains for a local observer to breed 



