Pierine Butterflies of the Genus Terias. 69 



not, however, quite correspond with T. hecabe in pattern in 

 any of its seasonal forms, and appears to be locally constant. 

 Cramer's Pap. hecabe (Pap. Ex. vol. ii. pi. cxxiv. figs. B, C) 

 probably represents the intermediate form of T. unduligera. 



36. Terias Jiecabe. 



Papilio hecabe, Linnaeus, Mus. Lud. Ulr. p. 249 (1764). 



Terias blanda, Boisduval, Sp. Gen. Lep. i. p. 672 (1836). 



Terias cesiope, Me'netrie's, Oat. Mus. Petrop., Le*p. i. p. 85, pi. ii. fig. 3 



(1855). 



Terias subdecorata, Moore, P. Z. S. 1878, p. 699. 

 Terias arcuata, Moore, t. c. p. 700. 



South China from Hong-Kong to Tonkin, including the 

 island of Hainan. 



In this species the wet-season form appears to vary very 

 little, but the intermediate and dry forms exhibit considerable 

 variation in the width of the outer border of the primaries. 

 T. cesiope is a dry form corresponding with the wet-season 

 form (T. hecabe) ; in T. subdecorata the only difference of 

 importance is in the much less angular upper inner margin 

 to the apical portion of the outer border ; in T. blanda the 

 inner edge of the outer border is almost or often quite regu- 

 larly arched, and T. arcuata appears to be the same thing 

 with an intermediate character of under surface. The follow- 

 ing, which may prove to be a further development of the 

 dry-season form of T. hecabe } was also described from 

 Hainan ; but the Museum possesses only a pair, presumably 

 of this species, from the Loo-choo and Madjico-sima Islands ; 

 therefore, for the present, I keep it separate. 



37. Terias attenuata. 

 Terias attenuata, Moore, P. Z, S. 1878, p. 700. 



Hainan; also ? Loo-choo and JVIadjico-sima groups. 



It is of course possible that our examples, in spite of their 



resemblance to Dr. Moore's insect, may prove to be the dry 



i form of T. Hobsoni] their habitat seems to render this more 



I likely than that they should be a variation of the Southern 



| Chinese species. 



38. Terias suava. 



Terias suava, Boisduval, Sp. G6n. Le*p. i. p. 670 (1836). 



Terias hecabeoides, Me'ne'trie's, Oat. Mus. Petrop., Lep. i. p. 85, pi. ii. 



fig. 2 (1855). 



Terias fimbriata, Wallace, Trans. Ent. Soc. ser. 3, vol. iv. p. 323 (1867). 

 Terias simulata, Moore. Lep. Ceylon, i. p. 119, pi. xlv. figs. 2, 2 a, 2 b 



(1881). 



