496 L. de Niceville & Dr. L. Martin — Buttei-flies of Sumatra. [No. 3, 



must be more common in the Gayoe-lands, as the Gayoe collectors 

 always brought it in largely. 



540. Terias sari, Horsfield. 



Wallace. Distant. This species is well figured by Distant, and 

 by Snellen in Midden-Sumatra, Lepidoptera, pi. i, figs. 8, 9, male (1892), 

 as T. hecabe, Linnaeus, var. two. The Sumatran is absolutely identical with 

 the Indian form. Both sexes have a double line at the end and a small 

 linear marking at the middle of the discoidal cell of the forewing on the 

 underside. The female is of a paler yellow colour than the male, with 

 the marginal band on the upperside of the hindwing twice as broad 

 throughout its length, posteriorly inwardly diffused and powdery. 

 T. sodalis, Moore, described from the Mergui Archipelago in Lower 

 Burma, the types of which are in the Indian Museum, Calcutta, is a 

 synonym of T. sari. Moore says his species is smaller than T. sari, 

 but we have Sumatran specimens quite as small, but the marginal band 

 on the upperside of the hindwing in both sexes is certainly somewhat 

 narrower in both sexes of T. sodalis than in T. sari, but this very 

 poor character is not in my opinion sufficient to separate the two 

 specifically. 



541. Terias toba, de Niceville, n. sp. 



Habitat : N.-E. Sumatra. 



Expansk: d 1 , 1'2 and 1*6; 9 , 1'6 inches. 



Description : This species has been well figured by Snellen in 

 Midden-Sumatra, Lepidoptera, pi. i, figs. 10, 11, female (1892), as 

 T. hecabe, Linnaeus, var. one. It appears to be allied to T. sari, Hors- 

 field and has in both sexes a double line at the end, and two (instead 

 of one) small markings towards the base of the discoidal cell. Like 

 T. sari, it has the cilia of both wings black. It differs, markedly, 

 however, from that species in its much smaller size ; its very pale 

 primrose colour (T. sari is dark yellow) ; in the very large apical brown 

 patch on the underside of the forewing of T. sari reduced to a small 

 linear brown band, and the oblique brown marking at the outer 

 angle of 2'. sari altogether absent. The " male-mark " in this form is 

 short, broad, and very prominent. The female is even paler yellow than 

 the male, being almost as white as in the same sex of T. harina, 

 Horsfield. The marginal band on the upperside of the hindwing is 

 twice as broad as it is in the male, being of the same width as in 

 the male of T. tilaha, Hoi'sfield. It is possible that the male of 

 T. toba has been figured by Distant in Rhop. Malay., pi. xxvi, fig. 13, 

 male, as T. senna, Felder. True T. senna (see No. 538 above) belongs 



