Gynandromorphous Agriades coridon. 257 



A very important point to consider is the condition of 

 the general somatic characters on the two sides of the 

 body in these blues. Examination of a great Dumber of 

 specimens has convinced me that they are almost invariably 

 the same. 



Females of coridon vary in colour on the upperside from 

 pair brown to almost black. Some have the spol ringed 

 with white ab. attricincta, Tutt, others have whitish spots 

 internal to the lunules, and the amount of blue at the 

 base of the wings is very variable. However marked any 

 of these characters may be in a gynandromorph they are 

 present on both sides alike. The ground-colour of the 

 underside also is variable, but as in normal specimens so 

 in gynandromorphs it is the same on both sides. I have 

 one a peculiar silvery white on both sides, and another 

 of a most unusual chocolate brown colour on both the 

 gynandromorphous and the normal sides. 



Spotting often shows slight asymmetry in normal 

 females, and slight asymmetry is still commoner in 

 gynandromorphs, owing to the difference in size and 

 shape of the wings on the two sides ; but here again the 

 pattern is approximately symmetrical. 



I have three specimens ab. parisiensis, Gerh., on both 

 sides, one with basal spots obsolete, ground-colour pale 

 grey and a strong brown line near the margin on both 

 sides, and another is a well-marked example of ab. crassir 

 punda, Court., on both sides. Two specimens figured 

 show great asymmetry, but the difference in size is 

 so marked that it can probably be put down to this 

 cause and not to a real difference of somatic constitution 

 on the two sides. The only specimen I have seen in 

 which the difference is such as to make me suspect a true 

 segregation of somatic characters, heterochroism, is figured 

 in the Journal of Genetics (PI. xxii. fig. 12). There is 

 great difference in size, which makes one suspect that it 

 is a gynandromorph, though I know one instance of simple 

 heterochroism where the asymmetry of size is equally 

 great. The presence of a blue scale on the small side 

 still further suggests a segregation of secondary sexual 

 characters. 



The most striking proof of the identity of somatic 

 constitution on the two sides is afforded by the specimens 

 of ab. semisyngrapha, Tutt. which show gynandromorph- 

 ism. My own specimen is figured (.Journal of Genetics, 



