CHALCOSIA. 267 



and most of hind wing dark, in tkallo the hind wing is white 

 with a black marginal band, in tiberina the marginal band of the 

 hind wing is narrower these being the Chinese and N. Indian 

 forms ; in the Ceylon form quadrifasciata, from sea-level, the 



Fig. 176. Chalcosia thallo, <$. 



white basal patch to the fore wing appears in combination with a 

 dark hind wing ; in venosa, from the hills, the hind wing also is 

 mostly pale ; in similata the pale band of the fore wing is wider, 

 and the dark area of the hind wing further reduced. 

 Hob. China; N. India; Ceylon. Exp. 50-60 millim. 



570. Chalcosia pretiosa, Wlk. Cat. xxxi, p. 116; C. $ S. no. 412; 



Moore, Lep. Ceyl. ii, pi. 96, fig. 4. 



Chalcosia pretiosa, var. albina, Hmpsn. III. Het. ix, ined., pi. 157, 

 fig. 5. 



c?. Fore wing as in affinis, except that the white band is 

 usually narrower and the subapical spots smaller ; the abdomen 

 and hind wing brilliant metallic blue. 



In the form albina there is sometimes a white basal patch to 

 the fore wing, and the hind wing is w T hite, with the base and outer 

 margin only metallic blue. 



Hob. Ceylon. Exp. 42 millim. 



571. Chalcosia distincta, Guer. Voy. Deless. Hist. Nat. p. 85, pi. 24, 



fig. 3 ; C.$S. no. 372. 



Antennas blue ; head and abdomen orange ; thorax grey, striped 

 with blue. Fore wing grey, with the following series of blue- 

 black spots in the interspaces one series antemedial, three of the 

 spots running back as streaks to the base ; the others postmedial 

 and submarginal, which join below the cell and are continued as 

 one series ; a marginal series. Hind wing white, with a black 

 marginal band which occupies half the wing at the costa, and 

 narrows to a point at the anal angle. 



Hob. ? Assam ; Mergui ; Perak ; Borneo ; Sumatra ; Java. 

 Exp. 42-50 millim. 



