Gynandromorpkous Agriades coridon. 255 



Blue scaling may be extremely marked as in my sped 

 mens (Journal of Genetics, PI. xxi, fig. 6, and PI. xxii, 

 fig. 7). or very scanty as in a specimen in .Mr. T. \Y. Hall's 

 collection, which has about fifty blue scales with a few 

 androconia Dear the apex of the small fore-wing. I have 

 another specimen showing reduction in size of the wings 

 on the right side, especially of the hind-wing. It has 

 only four bine scales and do androconia, on the fore- 

 wingj but there are a few additional blue scales on the 

 hind-wing with one or two course hair scales and some 

 androconia (PI. IAV1II. fig. 1). 



Another with only a small patch of blue scales, coarse 

 hair scales and androconia is No. 17. and here there is 

 reduction in size of the lund-wing with do abnormal scales 

 (PI. LXVIU, fig. '2). From these the transition is only a 

 slight one to specimens such as Pickett's (Journal of Gene- 

 tics, PI. xxii, figs. 11 and 12) and to the specimens No. 18 

 and 19. These have the reduced size, hut do androconia. 

 Only one or two blue scales are present, but they lie in 

 those areas where blue scaling is commonest in gynandro- 

 morphs and only present in the bluest normal females. 

 They are, however, rather dark specimens with but few 

 basal blue scales. In No. 18, too, there is a single blue 

 hair scale. Mr. Pickett possesses a specimen of ab. semi- 

 syngrapha with no androconia and DO coarse hair scales, 

 but with marked difference in size on the two sides. No. 

 21 is quite remarkable; it shows do sign of faulty expan- 

 sion, and yet there is marked difference in the size of the 

 wings on the two sides, and with it a marked reduction in 

 the size of the lunules (PI. LXIX, fig. 2). 



I think that these very unusual specimens are really 

 of the same nature as the others, but t he evidence of t heir 

 gynandromorphism is masked. The reduction in size is 

 a remarkable feature. In A. coridon the male is consider- 

 ably larger than the female, and in the six or seven halved 

 or Dearly halved gynandromorphs recorded, the male side 

 has been largerthan the female. Yet in the predominantly 

 female gynandromorphs of Royston the side showing male 

 characters is smaller and. as a rule, the more marked the 

 male characters are the greater is the reduction. Local 

 areas which show many blue scales show parallel reduction 



in size, and so lead to deformity of wing, such a.s blunting 



of the apex, curving of the costa or indentation of the 

 margin of t he wine. 



