Gynandromorphous Agriades coridon. 253 



abnormalities found in the other specimens would not 

 have interfered with the production of fertile ova, but in 

 these four they must have led to complete sterility. In 

 three specimens, though the caput was present it was 

 abnormal in formation (see figures). 



In the thirty-nine specimens, where the point was 

 noted, a variable amount of granular material was seen 

 in the caput bursae in twelve, and in some it had become 

 very dark coloured and conspicuous. In twenty-seven 

 the caput was entirely transparent and empty. Of the 

 specimens described in the " Ent. Record," xxvi, p. 221, 

 granular material was present in numbers 4 and 6 and 

 absent in 1, 2 and 3, and it was also absent in the one 

 described in the Journal of Genetics, 1915. In twenty 

 normal females taken as controls, including three ab. 

 semisyngrapha, this granular material was noticed in 

 eighteen, it was absent in two. Unfortunately the material 

 was not examined in a fresh condition. Prolonged boiling 

 in potash did not make it transparent. After boiling, the 

 caput in several instances was opened and the dark debris 

 was tested but failed to give either Millon's or the biuret 

 reaction for proteids, a failure which is not surprising in 

 view of the treatment to which it had been subjected. 

 The material is probably altered semen, and could only 

 be present in females after fertilisation. If this view is 

 correct, its presence in so few gynandromorphs shows that 

 a much smaller proportion oi these had been fertilised 

 than of normal females. 



Psychology. 



Of the psychology of these gynandromorphs 1 hive 

 little information to offer. Their rarity and the enormous 

 numerical preponderance of females over males at Royston 

 makes it very difficult to take any observations. 



I have never seen a gynandromorph being courted by 

 a male, nor found one paired. Mr. Newman, with a wider 

 experience, has never seen one courted or paired. Mr. 

 Pickett says he has paid special attention to this point, 

 and in no year has he seen one paired or being courted 

 by a male/ There seems to be no phy Leal reason why 

 this should not take place, and only in a very small pro- 

 portion does there appear to be any anatomical obstruc- 

 tion to fertilisation or opposition. II my suggestion 



