240 LEPIDOPTEBA INDICA. 



CaslaUus clyton, Hubner, Verz. bek. Schmett. p. 695 (1816). 



Polyommatiis clyton, Godart, Enc. Meth. ix. p. 679 (1823). 



Papilio coridon, Cramer, Pap. Exofc. iv. pi. 340, figs. C, D, E (1781). 



Castalius naxug, Hubner, Verz. bek. Schmett. p. 70 (1816). 



Castalius choia, Swinhoe, Proc. Zool. Soc. 1885, p. 133. 



Castalius approximatus, Butler, Ann. Mag. Nat. Hist. 1886, p. 186. 



Wet-season Brood (Figs. 1, $, la, $, lb, $). 



Imago. — Male. Upperside white, densely irrorated on the basal third of both 

 wings with brilliant blue scales ; all the markings black. Forewing. A narrow band on 

 the costa ; a fairly broad band on the outer margin ; three large more or less round 

 spots in an oblique row from the centre of the basal third to the costal fourth ; five 

 similar spots across the disc, the first on the hinder margin near the angle and generally 

 touching the outer band, the second above and touching it, but a little more inwards, 

 the third somewhat outwards touching the middle of the outer band, the fourth and 

 fifth oblique, touching them, but are placed a little inwards, and all are usually joined 

 together. liindwing with the basal spots submerged in the brilliant blue scales ; costal 

 band narrow, continued round the apex joining the broad outer marginal band, which 

 occupies a third of the wing, leaving merely a broad transverse medial band of white ; 

 the inner edging of the outer black band is composed of large spots running into each 

 other, and within the band there is a regular series of white lunules. Underside white, 

 all the markings deep black. Foreicing with a straight black streak, which first crosses 

 the base of the hindwing and runs to the costa of forewing a little before the middle ; 

 a very large spot in the middle third, sometimes pear-shaped ; a band from the costa 

 near the end of the streak to near the hinder margin a little before the angle, composed 

 of large spots joined together, broken in the middle ; a sub-apical band of four spots 

 parallel to it, the third nearer the apex than the others, the lower three generally 

 touching each other. Hindimng with a short sub-basal streak from the abdominal 

 margin ; a spot outside its upper end, and close outside this a band of six spots in 

 three pairs, the pairs joined together, one above the other ; both wings with a sub- 

 terminal complete row of small, round spots ; on the hindwing there are also some 

 black spots close inside this row, and both wings have an anticiliary row of black dots. 

 Cilia white, alternated with black ; a filamentous short tail to the hindwing black, 

 tipped with white. Antennse black, ringed with white ; head and body black above, 

 white beneath. 



Female. Upperside like the male, but the outer bands are much broader and the 

 spots coalesce, leaving very little of the white ground colour on either wing. Underside 

 is similar to the underside of the male, but most of the spots on the forewing are joined 

 together into bands. 



Expanse of wings, $ $ l-^-jj inches. 



