356 Professor E. B. Poiilton on colour-relation 



than the lightest in I as regards its pale patches, but 

 distinctly lighter as regards its ground-colour. And this 

 comparison only holds for a single exceptional dark larva. 

 All others in II were far lighter than any in either I or III. 



lY. THE QUERCIFOLIA LARY.E EXPOSED THROUGHOFT TO 

 THE LEAVES AND SHOOTS OF THE HAWTHORN. 



Only 6 larvfe remained alive, and of these but 2 were in 

 the last stage. Four larvaft possessed a ground-colour very 

 like that of series III, but the white patches were far 

 larger, and tended to spread as a greyish shade down the 

 sides. The light patches were, however, much smaller 

 than in the larv.'^ of series II. One of the smallest larvae 

 was dark with very small white patches, like one of the 

 darkest of III. A dying larva, unable to change its skin, 

 was intermediate between this latter and the 4 first- 

 mentioned larvoB. 



The colours of these larva? in series IV seem to have 

 been influenced by the brownish and greyish twigs and 

 shoots of the hawthorn. 



Last General Comparison of the quercifolia 

 LARv^ after Hybernation, Mat 25th. 



Of series I it was recorded that the single larvae in A 

 and 2 in B were black with conspicuous white markings ; 

 while 1 in B, 1 in B^, and 2 in C were dull black with 

 onl}^ a pair of small inconspicuous Avhite mai'kings. 



Of series II nothing is recorded which is not contained 

 in the description of cylinders D to G. 



Of the 4 larva? then remaining in III it was noted that 

 the lan'fB in K much resembled the black-and-white ones 

 in A and B ; while the 3 in I and I^ were dull blackish 

 with the pale markings ver}" inconspicuous. 



Only 2 larvae remained alive in IV. The brownish 

 ground-colour of both was much clouded and overspread 

 Avith grey, and the pale patches tended much to spread 

 downwards, becoming grey and clouded especially towards 

 the ventral surface. 



Transfer Experiments with the Lary^ of 

 Amphidasis betularia in 1896. 



A female moth, captured at Oxford, laid a small batch 

 of eggs, which provided the material for the following 



