1154 JOURNAL, BOMBAY NATURAL HIST. SOCIETY, Vol. XXL 



wing and the whole surface of the hind wing varies to rich chrome-yellow. 

 Female similar ; the black markings on both upper and undersides broader, 

 the white spots on black apical area of forewing often sub-obsolete 

 above. Antennas in both sexes black, sparsely sprinkled with white 

 dots ; head, thorax and abdomen above and below white ; thorax above 

 often bluish grey. Dry-season form. Male and female : similar to male and 

 female of wet-season form, but on the upperside the black markings are 

 narrower, the white markings on the black apical area of forewing broader 

 and longer, and on the hindwing the narrow inner margining to the black 

 .on the termen very narrow, somewhat obsolescent ; therefore, the white 

 subterminal spots have the appearance of opening inwards. Underside : 

 ground colour almost pure white ; on the hindwing slightly tinged with 

 yellow. Antennee, head, thorax and abdomen as in the wet-season 

 form. Expanse : 42-62mm. 



Egg. — Is of the usual type of pierid egg, cylindrical with a domed top, 

 twice as high as broad, the dome truncated in a small circle at apex where 

 the 12 meridional ridges, triangular in tranverse section, meet in a 

 thickened ring, their extremities hardly forming teeth round it or on it ; 

 the surface is shiny and finely, transversely striated both on the ridges and 

 intervening parts. Colour white when laid, turning orange. L.: -omm; B: 

 about '26 mm. 



Larva. — The first stage of the little larva has the head black and shiny, 

 set with long, white hairs; the colour of the body is oily yellowish-green 

 and there is a dorsolateral hair to each segment carrying a globule of 

 liquid at its tip; the anal end is reddish. 



The second stage is very much the same as the first in colour of head 

 and body and everything except size which is of course somewhat larger. 



The third stage has the head black, shiny with a bright yellow, triangular 

 clypeus and it is set all over with white bristles proceeding from minute 

 tubercles. The body is cylindrical and has the usual subdorsal, dorso- 

 lateral, supraspiracular tubercles as well as one subspiracular, each bearing 

 an erect bristle at its tip. Body green with a broad, supraspiracular, 

 purple-brown band. 



Fourth stage. — Head shiny black with rather long, erect hairs 

 which are either white or the colour of the head; a yellow line bordering 

 the clypeus distinct. Anal segment rovinded in outline, though inclined 

 to be square-ended, about as long as broad, only slightly convex dorsally^ 

 with two yellow, vitreous tvibercles, one on each side of dorsal line. Body 

 surface oily-looking with the usual tubercles, subdorsal, dorsolateral and 

 supraspiracular, yellow, vitreous and conical, each bearing a short, brown 

 hair which may exude a globule of liquid from its tip; there is a subspiracular 

 tubercle, bearing a longish white hair, as large as these; besides these 

 -main tubercles there are many minute ones, each bearing a short, fine. 



