64 Dr. A. G. Butler on the Oil- World 



Our seven examples of this species all belong to the wet- 

 season form, nor have I seen a dry form of this insect. 



20. Terias sana. 



Terias sana, Butler, P. Z. S. 1877, p. 470. 



Terias hespera, Butler, Ann. & Mag. Nat. Hist. ser. 5, vol. xvii. p. 214 

 (1886). 



New Guinea to Northern Australia. 



T. sana was described upon two small wet-season examples 

 from New Guinea ; T. hespera upon the dry form from N.E. 

 Australia. The species is represented in the Museum by 

 eleven examples. 



21. Terias venata. 



Terias venata, Moore, Cat. Lep. E. I. C. i. p. 65, pi. 2 a. fig. 2 (1857). 

 Terias santana, Felder, Reise der Nov., Lep. ii. p. 211 (1865). 

 Terias rama, Moore, P. Z. S. 1872, p. 566 ; Lep. Ceylon, i. p. 121, 



pi. xlvi. figs. 5, 5 a (1880-81). 

 Terias pallitana, Moore, Ann. & Mag. Nat. Hist. ser. 4, vol. xx. p. 48 



(1877). 



Eanges from the Himalayas southward to Ceylon and 

 probably eastwards through North China, for we have it from 

 Chusan Island and from the Philippines. 



The seasonal (?) forms differ less than usual : T. rama is 

 probably the best-marked wet type, T. santana intermediate, 

 and T. venata (of which T. pallitana is the female) the dry; 

 but, on the other hand, it is possible that, as seems to be the 

 case in the closely allied T. betkeseba, no differing dry form 

 may exist, and the slight discrepancies in the pattern of the 

 upper surface or the definition of the markings on the under 

 surface may be partly local and have a subspecific value. 

 The fact that we have the extremes from the Anamully Hills 

 proves that they are not permanently separated as distinct 

 species. 



Two males in the Museum from China differ in having 

 the female pattern on the upper surface of the primaries as 

 in T. Iceta. 



22. Terias herla. 



Pieris herla, McLeay, King's Surv. Austr. ii. p. 460 (1827). 

 Terias lineata, Miskin, P. R. Soc. Queensl. vi. p. 251 (1889). 



Northern Australia. 



T. lineata is the dry -season form of the species. 



