COMMON BUTTERFLIES OF THE PLAINS OF INDIA. 439 



Hindwing underside : posterior four ocelli in 

 a straight lino {viih Fig. 7, A). 



C D 



Fig. 6. — Underside forewings of ]ift/cale.<i^, showing secondary sex-mark of specialised 

 scales. 



A. J/. pei:<etts, Fabr. B. M. polt/decta, Cramer. 

 C. 31. suhd'ta, Moore. D. M. viiala, Moore. 

 «'. Forewing underside in male : sex-mark 

 small, under 2mm. in length, black or 

 dark brown in colour. Exp. 1'9" to 2-2" 

 (vide Fig. Q,'B) pohjdecta. 



A -^ B 



Fig. 7. — Arrangement of ocelli on underside of hindwingin 



A. Af. poli/dectfi, Cramer. B. J/, perseus, Fabr. 



ft'. Forewing underside in male : sex-mark 

 larger, over 4ram., brown, never dark 

 (vide Fig. 6). 

 a'. The sex-mark not extending to trans- 

 verse white discal band. Exp. 1-75" to 



2-2" (vide Fig. {],C) perseoides. 



b". The sex-mark extending to and touching 

 the inner margin of that band. Exp. 



1 -'J* to 2-35" (vide Fig. 6, G) subdita. 



The ocellus of the forewiiicr under heads A and B is situated about 

 the centre of the forewino- nearer the outer mariiin than the base. The 

 sex-marks are only found in the males on the underside of the fore- 

 wing above the inner margin where they are easily seen on the satiny 

 white ground distinguishing that region {vide marginal Fig. 6). There 

 is, besides, on the uppei*side of the hindwing, facing this mark, a 

 conspicuoiLS tuft of long, recumbent hairs, generally white in colour. 

 20 



