Mr. A. G. Butler oyi the Oenus Terias. 219 



Of this species we liave five examples exhibiting' no varia- 

 tion beyond the more or less strongly pronounced character of 

 the markings on the under surface ; no marking is in any case 

 wanting or even indistinct. 



Terias cesiope group. 



In this group the anterior and posterior portions of the 

 external border are of nearly equal width on each side of the 

 bisinuation ; the apical portion, however, a little wider, and 

 widening rapidly from the sinus to the costa. As I have 

 already stated, these distinctions are purely arbitrary, the 

 last species of one group having perhaps as much right to be 

 placed in that following it as the first species of the latter ; at 

 the same time it is more convenient to consider a few allied 

 species at a time than to have the whole genus upon one's 

 hands at once. The following are in the Museum : — 



T. cesiope^ Men^tr. ; T. unduligera^ Butl. j T. variata^ 

 Butl. ; T. sulphurata, Butl. ; T. aprica, Butl. j T. Hobsonij 

 Butl. ; T. hehridinaj Butl. ; T. inanata^ Butl. 



Terias cesiope^ M^netries. 



For some years past this species, wliicli is rare in collec- 

 tions, has been entirely misunderstood. The insect figured by 

 M^netrids is a female, evidently from China; we have it in 

 the Museum from Hong Kong, and Mr. Moore has it from 

 Hainan. The male is very diiferent, resembling on the upper 

 surface my T, unduligera^ but like its own female on the 

 under surface : we have it from Formosa, Mr. Moore has it 

 from Hainan, and Mr. Distant has figured it as the male of 

 his T. hecahcj var. a, and gives a number of localities, includ- 

 ing the somewhat wide one of continental India, which makes 

 it evident that he has not discriminated between true T. 

 cBsiojje and the form so called in recently published papers. 



Terias sulplmrata^ Butler. 



The species from Aru recorded under this name in my list 

 of ' Challenger ' Lepidoptera is probably my T. api-ica^ which 

 it agrees with perfectly on the upper surface ancl very nearly 

 on the under surface. From T. sulphur ata it differs in its 

 deeper colouring, the transverse instead of oblique inner edge 

 of the outer border towards apex of primaries, and the much 

 less prominent subapical markings on the under surface of 

 these wings. The form occurring at Lifu may also prove to 

 be distinct from T. sulphurata, but I should wish to see 

 more specimens before separating it. 



