L. DONCASTER 95 



feathers on the body, wings and tail, and in two out of the three with 

 the rump ahnost or quite white. 



In Series D (white $ x black (/) there were 7 young resembling on 

 the whole the F^ from Series 6', but with the white and black more 

 evenly distributed. These birds might be described as mottled or 

 chequered with black and white, or as white thickly scattered with 

 black feathers, with most of the primaries and rump feathers and some of 

 the tail feathers white. After 7 young had been hatched the white hen 

 died, and another was paired with the cock (mating Z)„), and produced 

 12 young'. These on the whole had more white than those of the first 

 family, but it varied in the amount from one case iu which the bird 

 was quite white, with the exception of a small black patch on the right 

 side of the rump, to white birds sprinkled with black feathers on the 

 head, body and wings, and with a number of the middle tail feathers 

 black. It was impossible to classify these birds sharply into classes 

 with more or less white. 



Pairings were made between F^ birds from both matings C and D. 

 From C two such pairings were made both between birds with pre- 

 ponderance of white. In one {Ga I) 13 F., young were produced, 

 3 white, 7 white with black patches, 2 black with white feathers (of 

 which one had only 6 white feathers) and one ' blue ' with a good deal 

 of white. Many of the blue (slate-grey) feathers had a trace of rusty 

 colour, and in the left primaries and tail the feathers were white speckled 

 with grey ; the secondaries and wing coverts of both wings and the tail 

 feathers had dark grey tips, giving a distinct tail-bar and a suggestion 

 of a wing-bar. 



In the second pairing {Ga II) between F^ birds from Series C 

 18 young were produced, 6 white, 4 white with black patches, .5 black 

 with white feathers, and 3 blue and white. The blue feathers were in 

 excess of the white, but as in the previous case the blue was not clean, 

 but was dark and tinged with brown or rusty. 



In Series D three pairings were made between F-^ birds. In the 

 first only 4 young were produced, 3 white with black patches, and one 

 white with patches of blue. The F^ cock then died, and was replaced 

 by another, from which pairing 15 young were raised, 7 white, 4 black 

 with white, 4 blue and white, the white preponderating in three of the 

 latter, and the fourth being mottled. 



In the third pairing between F^ from Series Z* 10 young were 

 reared, 5 white, 3 white and black, 1 black and white, 1 blue ami white. 



' These two matings are included together in Fig. 4, p. 24. 



