58 



Melanism in Tephrosia consonaria 



Melanic x Type [DD x RR]. 



Imagines 



Totals 



334 



Five types are recorded. Four of them occurred in the pairings 

 made by Mr L, W. Newman, that is to say, before the larvae were kept 

 under experimental conditions, and had possibly strayed from some 

 other source. The percentage of types included in the later families is 

 less than 1 per cent. 



The type parents of families '15 A and '15 5 above were captured 

 in the same wood as the original melanic $ . The type parents of '17 A 

 and '18 Twere extracted from melanics. The type parents of '18 5 and 

 '18^ were wild insects from pupae collected in Buckinghamshire. 



The result of pairing heterozygous melanics with types, either way, 

 gives almost exactly 50 °/^ melanic and 50 7o type, as follows : 



The type parents of families '18^, C, G, H, I, V were wild type 

 insects. Those of families '18 iV and '18 Q were types extracted from 

 melanics. In this and the previous cases reciprocal crossings were 

 obtained, but it appears to make no difference which parent was melanic 

 and which type. The sexes have also been separated in each family, but 

 the proportions appear to have no significance. 



