Adjustiiient of colour in various pupse, etc. 



401 



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

 so de.scribecl : when no reference is made to this character 

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

 (3 a)s. 



I will now briefly summarise the results obtained with 



this highly interesting and sensitive pupa. For the sake 



of brevity (3 «)s are called light pupae ; (3 &)s green pupae. 



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



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



