Mimetic Patterns to the Original form. 69 
all but reached the complete mimetic condition of 
M. pyrrha 2 (Figs. 9,10). The only thing still wanting 
is an infusion of more or less brownish red into the pale 
yellow or orange of the costal and central streaks. It is 
observable that even in the female J. pyrrha the assi- 
milation between the old red of the basal patch and the 
new red of the costal and central areas is not quite per- 
fect, the former always retaining on the under surface a 
more vigorous and decided tint than the latter (see 
Bie. Oye, cd, WE 
With regard to the forewing, there is no doubt a con- 
siderable interval between the male and female of 
M. pyrrha. An inspection, however, of the female of 
M. lorena and M. malenka (Figs. 6, 7, 8), enables us to 
see how it may be bridged over. Comparing the sexes 
of M. lorena (Figs. 4, 6, 7), we find that their patterns 
are identical in the main features, though the female has 
an additional dark streak in the forewing (l) running 
parallel with the inner border. ‘The central pale area of 
the hindwing has also in the female almost or entirely 
disappeared from the lower surface, while the other 
spaces on both wings which in the male are white or 
very pale yellow, assume inthe female a deeper yellow, 
warming towards the base of the wig to an orange or 
brownish red. ‘These changes, comparatively slight as 
they are, are sufficient to give the temale M. lorena, a 
decidedly Heliconine aspect. They point out, moreover, 
the manner in which the still more completely Heliconine 
facies of M. malenkw ¢ (Fig. 8) and M. pyrrha 
(Figs. 9, 10) may grow naturally out of the Pierine 
materials already noticed. A very close comparison of 
M. pyrrha with H. numata (Figs. 10, 11) will indeed 
show that the correspondence of markings is not abso- 
lutely perfect in every particular; nevertheless, the 
general effect is marvellously alike, and if assisted by 
similarity in habits and mode of flight, must be amply 
sufficient for all practical purposes of protection to the 
Mylothris. 
Looking at this series as a whole, and bearing in mind 
that it would be possible to include other forms * which 
would render the gradation still easier than is shown 
* For example, P. marana and M. lypera 92. 
