342 Mr. A. K. Wallace's Notes 



varying much from closely-allied species to species. Here 

 we have them as a sexual distinction ; and we also find 

 them varying in an unusual degree from species to species. 

 It is a] so very interesting to remark, that in the two species, 

 T. Eobertsia and T. Viola, the Singapore variety is more 

 highly coloured, and has the branches of the median 

 veins more distant from the base of the wing than in the 

 more rufous-tinged Sumatran specimens, showing a re- 

 markable correlation between local modifications of tint, 

 and what are usually important and stable structural 

 characters. 



Terinos Nymph a, n. s. 



Male. Form nearly as in T. Clarissa, but the outer 

 margin of the upper- wings rather less hollowed, and that 

 of the lower-wings considerably less angulate. 



Above : colour as in T. Clarissa, but the velvety patch 

 extends higher across the upper discoidal vein, while it 

 does not extend so far towards the base of the wing ; 

 position of the lower disco- cellular nervure as in T. 

 T amies. The orange-rufous patch on the hind- wings 

 contains no dark lunular markings, but has a bluish sub- 

 marginal line, most distinct near the anal angle, and the 

 velvety patch at the outer angle extends fully half-way 

 up the inner margin. 



Beneath : the markings are very similar to those of 

 T. Clarissa, but there is a broad terminal band of pearly- 

 pinkish- white on the hind- wings. 



Expanse 2*9 inches. 



Hah. — Sarawak. 



Distinct in form, neuration and colouring from the 

 closely-allied T. Clarissa. 



Tekinos Eobertsia. 



Butler, Ann. & Mag. Nat. Hist. 3rd Ser. vol. xx. p. 399, 

 pi. viii. figs. 2, 3, 4. 



Hah. — Malacca (Roberts); Singapore (Wallace). 



In this form the disco-cellular meets the median vein 

 a little nearer the base than the origin of its second 

 branch. 



Local form. A. 



Hab. — Sumatra (Wallace). 



Browner, with the blue portions more violet, and the 

 white posterior spots replaced by rufous. The disco-eel- 



