192 



Genus IXIAS. 



Ixias, Hiibtier, Verz. bek. Schmett. 1816, p. 95. 

 Thestias, Boisduval, Spec. G6n. Up. i, 1836, p. 590. 



Type, I. pyrene, Linn., from India and China. 



Range. Indo-Malayan Eegion and China. 



c? $ . Fore wing : costa regularly arched ; apex rounded or 



obtuse ; ternien straight ; tornus rounded ; dorsum very slightly 

 sinuous ; cell comparatively broad, 

 about half length of wing; upper 

 discocellular absent, middle and lower 

 concave, the former much shorter 

 than the latter, vein 5 therefore 

 closer to 7 than to 4 ; vein 6 from 

 lower side of 7, beyond apex of cell ; 

 vein 8 absent ; vein 9 from apical 

 third of 7 ; veins 10 and 11 free, from 

 apical half of subcostal vein, 10 

 equidistant from apex of cell and 

 base of vein 11. Hind wing: short 

 and broad ; cell broad, upper disco- 

 cellular shorter than middle, the 

 lower the longest, slightly concave 



Fig. 50. Mas pyrcne, venation, in its upper half; termen more or 

 less obtusely pointed at apex of 



vein 2. Antennae about half length of fore wing, club gradually 



spatulate, blunt at apex ; eyes naked ; legs slender, claws very small, 



strongly curved. 



" In this genus seasonal variation is shown on the upperside by 



the black markings being broader and more prominent, and on the 



underside in the ocelli and other markings tending to become 



obsolete in the rainy-season forms." ( Watson.) 



Key to the forms of Ixias. 



a. Upperside both -wings : ground-colour clear 



gamboge-yellow. 

 a'. Uppevside fore wing : ground-colour not 



extended into base of interspace 3. 

 a 2 . Upperside fore wing : preapical orange 

 patch extended into and across apex of 

 cell. 



3 . The extension of orange colour into apex 

 of cell interrupted, present above and , j 



below ; a black discocellular spot \ '- . r 



b\ The extension of orange colour into cell ' ,W "'" 



not interrupted, passes across cell . . . . \ Py rene > va 

 b*. Upperside fore wing : preapical orange patch ' CJJt #*i P- *- 



extended only into upper apex of cell \ Py rene > var - 



j ptrenassa, p. 194. 



