AMBLYPODIIN^. 149 



carefully examined them, and have submitted them to Mr. Bethune-Baker for 

 examination, they cannot possibly be separated from centaurus and are absolutely 

 typical, they correspond to Felder's descriptions, but his figures are very misleading, 

 vihara is quite wrongly identified in the National Collection, and this has led to the 

 confusion that has taken place, especially with reference to vihara. Distant's and 

 Bethuue-Baker's figures represent quite another species, our figure (male of centaurus) 

 is from Felder's type of vihara. 



ARHOPALA PIRITHOUS. 



Plate 673, figs. 1, ^ , la, ? , lb, $ . 



Nilasera pirithous, Moore, Proc. Zool. Soc. 1883, p. 531. 

 ArJiopala pirithous, Swinhoe, Trans. Ent. Soc. 1893, p. 299. 



Arhopala centaurus, de Niceville (part), Butt, of India, iii. p. 234. Bethune-Baker, Trans. Zool. Soc. 

 1903, p. 39. 



Imago. — Male and female like centaurus above and below, but the male on the 

 upperside has an extremely narrow outer black margin, a mere anteciliary line ; the 

 underside in both sexes is paler in colour, the discal band in the forewing is more 

 regular and complete, the markings on the hindwing blurred and very indistinct, and 

 though there are a few blue-green scales in an occasional example, the black spots 

 prominently capped with blue-green near the anal angle are usually absent. 



Expanse of wings, ? ? 1^^ inches. 



Habitat. — Sikkim, Assam. 



Distribution. — A common form in Sikkim and Assam, we have received many 

 examples from the Khasia Hills. 



ARHOPALA CORUSCANS. 



Plate 673, figs. 2, (J , 2a, ? , 2b, (J , 2c, larva and pupa. 



Arhopala centaurus, var. coruscans, Wood-Mason and de Niceville, Journ. As. Soc. Bengal, 1880, 



p. 234. 

 Nilacera ptrama, Moore, Lep. Ceylon, i. p. 116, pi. 43, figs. 3, 3b, (J , 3a, 9) 3c, larva and pupa 



(1881). Manders, Journ. Bo. Nat. Hist. Soc. 1904, p. 78. 

 Arhopala centaurus, Watson (nee Fabricius), Journ. Bo. Nat. Hist. Soc. 1890, p. 35. Davidson and 



Aitken, id. p. 354. Comber, id. 1903, p. 357. 

 Arhopala centaurus, de Niceville (part). Butt, of India, iii. p. 234 (1890). Bethune-Baker, Trans. 



Zool. Soc. 1903, p. 39. 



Imago. — Male. Upperside brilliant dark blue or ultramarine blue, becoming 

 gradually darker towards the costal and outer borders, costal and terminal line finely 

 black. Cilia black, the abdominal space of the hindwing usually very pale, somewhat 



