SOME UNDESCRIBED RHOPALOCERA FROM SIAM. 169 



Thorax black except below close to the wings, where it is red. Abdo- 

 men red, spotted laterally with black, shiny blue-black above. 



Length of forewing. — 57 mm. 

 "" B. M. Type No. Rh. 114, 6, Ban Na Sao, French Laos, 23. 

 2. 20. 



This species, of which only the single male described is at 

 present known, has the size, build and shape of P. alcinous Klug. It 

 has, however, a smaller tail, it lacks the usual grey appearance, es- 

 pecially of the underside, of that insect, and the lining of the abdo- 

 minal fold is almost white, resembling P. plutonius Oberth'Ar. Also 

 the spots, especially of the underside, of the hindwing are more 

 numerous and much more irregular in outline. 



The Type specimen was taken by a Siamese collector and, at 

 the time the description was written at the British Museum, it was 

 thought that Ban Na Sao, the type locality, was in Siamese territory. 

 Subsequent enquiries have shown that this is not so — Ban Na Sao 

 being actually in French Laos, E. of Saniabouri, about 40 miles from 

 the Siamese frontier. 



PIERID^E. 



2. Delias agoranis H. G. Smith. 



Delias agor.mis, H. G. Smith, Ann. Mag. Nat. Hist. (5), xx, p. 



226 (1887). 

 Piccarda agoranis, Moore, Lep. Ind. vi, p. 182, pi. 535, figs. 2, 2* 



(1905). 

 Deli is agostint, race agoranis, Bingham, Fauna Br. Ind. Butt, ii, 



p. 147 (1907). 

 Deli is singh ipurr agoranis, Fruhstorf er, in Seitz Macro-lep., ix, p. 



124 (1910). 

 As the above references indicate, this species has been some- 

 what unfortunate in its treatment by recent authors. We consider it 

 a good Sp3cies, equally distinct from both singhapura and agostina, 

 though certainly somewhat intermediate in some respects between the 

 two. Our specimens agree perfectly with Moore's figure which was 

 made from the Type specimen. 



Singhapura has the veins of the underside of the hindwing 

 heavily marked with black; this is entirely absent in agoranis. 

 Agostina is similarly devoid of this black veining, but then it has a 



VOL. IV, NO. 3, 1921. 



