326 JOURNAL, BOMBAY NATURAL HIST. SOCIETY, Vol, XXIL 



typical fyrene interrupted there hj a black discocellnlar spot. To 

 this group belong evippe, Dvuvj, rhexia, Fabr., sesia, Fabr., and 

 latifasciata, Butl. 



(2) Pirenassa group. — Fore wing : with the orange patch on the 

 upperside narrower, extending only into the upper apex of the cell. 

 To this group belong hausala, Moore, satadra, Moore, moulmeinensis, 

 Moore, frequens, Butl., dlicmnsalce, But!., ivatti, Butl., cingalensis, 

 Moore, jhoda, Swinh., alana, Swinh. 



99. Ixias marianne.— (PI. I, fig. Q2)~Wet-season irooc?.— Male, upperside: 

 chalk-white ; apical half of fore and terminal margin of hindwing broadly 

 black, the black on the latter broadest anteriorly. Fore wing : a broad, 

 rich-orange patch obhquely across the black area extended to the upper 

 apex of the cell, narrowed posteriorly and spread above the tornus into 

 interspace 1 ; opposite the apex of the cell this orange patch is very broad 

 and leaves only the apex of the wing and a comparatively narrow band 

 along the termen and eosta black ; base of the wing irrorated with black 

 scales. Underside : rich sulphur-yellow as in most of the forms of the genus, 

 irrorated with fusco-ferruginous, short, transverse strig^ and minute dots. 

 Fore wing : the orange patch of the upperside plainly seen by transparency 

 on the disc ; a broadly triangular area below the cell white ; discocellular 

 spot large and prominent, centered with white. Both fore and hind- 

 wings with a discal, transverse series of reddish brown spots, in other forms 

 characteristic of the dry-season broods, present and more or less conspi- 

 cuous, the spots always centred with white ; on the fore wing the patch 

 above the tornus prominent and in some specimens very large. Antennae 

 reddish-brown, head and thorax anteriorly with reddish-brown hairs, 

 thorax above with white hairs, abdomen black ; beneath : head, thorax and 

 abdomen white. — Female upperside: similar. Fore wing: the orange 

 patch on the black apical area narrower, posteriorly truncate, not 

 extended below interspace 2 ; an outer transverse series of four black 

 spots on the orange patch in interspaces 2 to 5. Underside as in the 

 male, the markings shghtly larger. Antennae, head, thorax and abdomen 

 similar. 



Dry-season brood. — In both sexes this differs less from the wet-season 

 form than it does in J. 2W^ne. The characteristic dry-season markings on 

 the underside are more pronounced, sometimes remarkably so. Expanse : 

 54-56 mm. 



Egg.— Is. of the usual shape, that is, shaped like a bottle, with a very 

 short neck; rather slight, with 11 longitudinal, fine ridges, the intervals 

 between them concave ; some 6 of these ridges, reaching the somewhat 

 thickened ring round the narrow top as Httle white teeth ; the neck of 

 the bottle affecting \ of the height ; surface finely, tranversely striated 

 paralledly, shiny. Colour light yellow when laid, turning flesh-coloured. 

 H : 1-5 mm.; B : nearly 0'5 mm. 



Larva. — First stage. — 1-5 mm. in length when born, ochreous in colour the 

 head black or yellow, round, with black tubercles and short black hairs. 

 Body cylindrical, anal segment bifurcated ; surface more or less sparsely 

 covered with erect bristles, each with a drop of liquid at its extremity. 

 Colour yellowish with sign of a dark-phrplish, spiracular band. 



