116 Prof. J. 0. Westwood on hoo Gynandromorplious 



Museum collection, -wliich exhibit the two varieties of 

 gynandromorphism above described. In one of these speci- 

 mens the gynandromorphism is exactly bilateral, the wings 

 on the right side of the insect having the colouring and 

 markings of the male strongly defined, whilst the wings on 

 the other left side are those of the female equally strongly 

 marked. The body is small and shrivelled, having the 

 appearance of a male, but the fore leg on the left side is 

 clearly masculine. 



The other specimen is clearly a male insect, as it pos- 

 sesses the brushed fore-legs and the slender body of this 

 sex, the wings on the left-hand side being also normally 

 masculine. Those of the right side, on the other hand, 

 exhibit a singular mixture of the characters of the two 

 sexes. On the upper side the fore-wing has the costa, 

 together with a narrow stripe along the fore-margin of the 

 discoidal cell of bright orange, this colour extending to the 

 tip of the wing, the outer posterior angle of which has also 

 broad orange, extending into the space along the apical 

 margin between the second and third branches of the dis- 

 coidal cell, which space is further marked by two little 

 orange dashes near the base, and a single one beyond its 

 middle. The basal part of the rest of the wing and the 

 middle extending to the central portion of the apical margin 

 is marked as in the female. On the hind-w^iugs the 

 costal portion extending nearly to the discoidal vein is 

 broadly orange, which colour is also seen occupying a large 

 portion of the wing from the middle of the outer margin 

 nearly to the anal angle, extending upwards between the 

 first and second branches of the median vein to the sub- 

 costal row of dark lunules. The remainder of the wing is 

 feminine. 



On looking at the insect from beneath, the two right- 

 hand wings are masculine, whilst the fore-wing on the 

 opposite side is almost entirely female, with some longi- 

 tudinal orange streaks along the costa as above, and some 

 slight orange rather indistinct marks on the external 

 margin. The hind-wing- on this side is curiously divided 

 in its colours, the costal portion being broadly masculine, 

 whilst more than half the wing is female. 



