CASTALIUS. 427 



Larva. " The caterpillar, which feeds on young shoots of Zizy- 

 phusjujula, is of the woodlouse form but flattened. Its texture 

 though apparently smooth is, if looked at with a lens, found to be 

 thickly covered with white hairs : its colour is greenish white 

 with a faint green dorsal band/' (Davidson, Bell & Aitken.) 



Pupa. " Similar in shape to that of C. rosimon, Fabricius, but 

 smaller and narrower. It is of a bright apple-green with a darkish 

 green line down the centre. There are some small red dots on 

 the edges of the wing-cases." (Davidson, Bell & Aitken.) 



Race airavati, Doherty. d . Upper side : as in the typical form 

 but the medial white band that obliquely crosses both fore and 

 hind wings is narrower and extends upwards on the fore wing to 

 vein 7 ; there is no distinct edging on either side of dark blue as 

 there is in the typical form, but the markings of the underside 

 show through by transparency and so give 

 the appearance of an edging which is 

 always more uneven and irregularly white ; 

 the suffusion of iridescent light blue on 

 both wings from base outwards is more 

 strongly apparent than in the typical 

 form. Underside : ground-colour as in the 

 -p. q, typical form ; the markings also similar in 



Castafius c'thion, character but all much broader and 



race airavati, $ . heavier ; on the hind wing the discal band 



continuous or almost continuous and on 



both fore and hind wings the inner subterminal series of spots 

 also continuous or nearly so ; the spots composing it large and 

 inwardly conical so that it has the appearance of an uninterrupted 

 macular black band the inner edge of which is strongly crenulate. 

 Antennae, head, thorax and abdomen as in the typical form. 

 $ . Upperside : also differs from that of the typical form in the 

 narrowing of the white band that crosses the wings obliquely, the 

 surrounding black border being very much broader. On the fore 

 wing the baud is further narrowed on the outer side posteriorly 

 by the detachment and shifting inwards of a portion of the black 

 edging of the terminal margin, this forms an irregular somewhat 

 rectangular detached spot on the outer side of the white medial 

 band. On the hind wing the white medial band is prominently 

 narrowed anteriorly by the encroachment on it of the inner 

 portion of the black area on the termen. Underside : ground- 

 colour and markings similar to that of its own cf . Antenna?, 

 head, thorax and abdomen as in the $ of the typical form. 

 Exp. c? $ as in the typical form. 



Hob. Great Nicobar Island and also the Central Nicobar 

 Group. 



