Heredity in six families of Papilio elctrelanus. 443 



as its interest lies in the exclusive predominance of cenea 

 female forms and in the astonishing contrast afforded with 

 Family 4, also bred from a hippocoon parent. It is of con- 

 siderable interest, as Mr. G. F. Leigh pointed out to me, 

 that the pupal condition of the great majority of examples 

 was prolonged through the winter months, although a 

 certain number emerged after the usual period. 



The hipxwcoon parent. — The specimen is a normal 

 example of this form with spot (5) undivided. 



The seventeen male offspring. — The variable black marking 

 of the hind-wing was on the whole less heavily developed 

 in the males than in those of any except Family 3. 



The thirteen female offspring — entirelg eenea forms. — All 

 the thirteen specimens possess ochreous scales in spot (1), 

 which however appears white to the naked eye in Nos. 23 

 and 26. Spot (1) is of a pronounced ochreous tint and 

 (3) very faintly ochreous in Nos. 14, 17, 20 and 27. 

 Spot (1) extends downwards and outwards, in the direction 

 of the pattern of liippocoon, etc., in Nos. 14, 17, 19 and 20 

 and very slightly in No. 9. A slight ochreous linear mark 

 near the basal end of the inner margin of the fore-wing 

 also tending in the direction of hippocoon, etc., is seen in 

 Nos. 1, 14, 17, 19, 20 and 27. Spot (5) is divided in 

 Nos. 9, 17 and, on the right side, 23 : it is nearly divided 

 in No. 5. 



Relation between the male offspring in the six Families. — 

 The increasing heaviness of the black hind-wing band is 

 shown by the letters A — D in the table on p. 429. It 

 must be borne in mind that there is a considerable interval 

 between stages C and D, but that the other intervals are 

 small. In all six families the pronounced serration of 

 the inner border of the fore-wing black margin is seen 

 in a considerable proportion of the males, and quite as 

 often in the more heavil}' marked as in the less heavily 

 marked individuals. Indeed upon the whole it appeared 

 to be slightly more characteristic of the latter. 



Hereditary tendencies in the details of the mimetic 

 pattern. — -A comparison of the mimetic forms with one 

 another in each family and with those of the other families 

 indicates the ample nature of the variational material by 

 which the mimetic pattern has been and could be again 

 adjusted to the details of the patterns presented by the 

 models. The condition of three elements in the pattern of 

 the fore-wing upper surface of the cenect offspring, and of 



