570 



C. C. Guthrie 



observed on the back and head; the smallest on the wings. The 

 markings of the feathers were not constant even in the same indi- 

 viduals. Some feathers were entirely black including the shaft, 

 while others had scattered markings on the vanes involving only 

 the barbs and barbules. In the black offspring, when white 



B2 



9chicks 



^2 



llcfi/cks 



12 chichs 



Fig. 3 Showing influence of foster mother. 



occurred it did not appear as a spot but some part of the body, 

 as the leg was solid white. No white feathers were found on the 

 backs. 



More data must be had on these points before definite conclu- 

 sions can be drawn. Breeding the offspring may add to our 

 knowledge along these lines. Similar experiments on chickens 



