<656 1) 
XXVII. The inheritance of small variations in the pattern 
of Papilio dardanus, Brown. By G. D. Hate 
CaRPENTER, D.M., Oxon. 
[Read November 5th, 1913.] 
Pirates XXXIX anp XL. 
Tue work of which this paper is an account was under- 
taken, at the suggestion of Prof. Poulton, in regard to my 
family of P. dardanus bred from ova laid by a parent of 
the form planemoides, Trim., and exhibited at the meeting 
of this society on June 4, 1913 (Proceedings, pp. lii—Ivi). 
The resulting female offspring—3 planemoides and 7 
hippocoon, F. (Plate XX XIX), suggested very strongly 
that the influence of the pattern of the parent is communi- 
cated to the pattern of the offspring of a different type. 
In order to prove this, careful measurements were made 
of the large divided white spot in the cell of the fore-wing 
of the 7 hippocodén forms, which was in most cases sharply 
marked and easy to measure. This spot is represented in 
the planemordes form by an orange area in the corresponding 
position, which at its outer end is not sharply marked, but 
continuous with the broad orange area forming the band 
across the fore-wing (Plate XX XIX, figs. 1, 4,6). In fig. 8 
it is seen that part of the orange area in the cell has become 
separated off, as in hippocodn. The spot was measured 
from the middle of its base at the costa to the extreme tip 
(often placed on a detached portion), along its longitudinal 
axis which, if prolonged, leads to the base of a nervure. 
[The origin of vein 5 (radial 2) is nearest to the point 
where the prolonged axis of the spot cuts the end of the 
cell, and there is little doubt that this is the vein to which 
the author measured. The marking is often more highly 
developed on the under surface, and it is there seen that 
the prolonged spot abuts against the lower or inner 
marginal half of the middle disco-cellular.—E. B. P.] 
Inasmuch as the actual size of the spot will vary, absolutely, 
because of the different size of the individual butterflies, it 
is necessary to have a common standard by which a small 
TRANS. ENT. SOC. LOND. 1913.—PaRT Iv. (MAR. 1914) 
