1252 ON TWO INSTANCES OF COLOUR VARIATION IN BUTTERFLIES. 
European forms of this insect, and that the Australian form — for 
which it may be convenient to retain the designation P. Kershawi 
as a varietal name — must be regarded as a local form, or at most 
as a geographical race, using the terms in the sense defined by 
INIi’. 
The second instance of variation is the case of a specimen of 
Papilio erectheus, a butterfly peculiar to the Australian sub-region, 
which was found by the late Mr. A. W, Scott, at Ash Island, in 
the Hunter River. In this specimen the first four of the brick 
red spots on the hindwing are enlarged to more than four times 
their usual size, thus giving the insect a very singular appearance. 
The fifth spot is about twice and the sixth nearly three times the 
usual size ; both these latter si>ots have the internal patch of blue 
scales, but they are entirely absent from the other portions of the 
wing. The accompanying illustration shows, clearly enough, the 
size and position of these brick-red spots ; in colour the specimen 
does not vary from the typical form. 
