Adjustment of colour in various pupx, etc. 401 



which presented any trace of a " wing-mark " are specially 

 so described : when no reference is made to this character 

 it may be assumed that it was absent in (3 &)s, normal in 

 (3 «)s. 



I will now briefly summarise the results obtained with 



this highly interesting and sensitive pupa. For the sake 



of brevity (3 a)s are called light pupaj ; (3 &)s green pupas. 



Black (1 to 7). The very powerful effect of black in 



TRANS. ENT. SOC. LONQ. 1899. — PART IV. (DEC.) 27 



