60 S. Kopec: Experiments on metamorphosis 
7) The buds of the wings grafted on caterpillars of different 
sexes continue to develop and exhibit, when adult, the characteris¬ 
tic dimorphic colour which is typical of the transplanted bud and 
not of the caterpillar on which it develops. The pigments produ¬ 
ced in the scales are not directly due to the drying of the hae- 
molymph; they are the effect of changes which are accomplished 
in the blood under the influence of specific ferments contained in 
the cells which are producing the scales (M a y e r). 
8) From the above it follows that, in the course of the metamorpho¬ 
sis of insects, processes of self-differentiation as well as phenomena 
of physiological, chemical or mechanical correlation, are implied. 
Embry ologico-Biological Laboratory, Jagellonian University, Cracow. 
