Constitution of the White Leghorn Breed. 187 



appeared only as minute ticks on an otherwise white plumage. In 

 this respect no difference was observed between 6^ cf and 9 9 . 

 Davenport (1909) has reported that in certain crosses involving a 

 W. L. Bantam d^ and certain black 99 the ticking was chiefly 

 in the 99. 



We may now compare the results of the present matings with some 

 similar cases reported by other investigators. First, among those 

 who have used the W. L. may be mentioned Davenport (1906) who 

 reports the following instances : 



1. W. L. (Bantam) cT X Dark Brahma 9. Result: 16 white, or white 

 splashed; 5 black; 7 barred and 3 of the Brahma type. All of the blacks were 

 99, while of the barred birds, 3 were cT d^, 2 99 and 2 of unknown sex. 



2. W. L. (Bantam) c^ X Black Cochin (Bantam) 9. Result: 10 white, 7 

 black and 7 barred. 



3. Single Comb W. L. d^ X Houdan 9 . Result: Of 41 individuals, all were 

 white with traces of black. 



In the following cases, Davenport mated various cf cT with White 

 Leghorn 9 9 : 



4. Black-breasted Red Game Bantam cf X W. L. (Bantam) 9. Result: 

 Among 24 individuals were 12 dark and several barred birds. 



5. Bnff Cochin Bantam cf X W. L. (Bantam) 9- Result: Among 31 off- 

 spring were 9 white, 9 white and buff, 4 white and black, 2 white, black and buff, 

 4 black and buff, and 3 black. No barred birds were reported for this cross. 



6. R. C. Black Minorca d" X S. C.W. L. 9 . Results: Of 83 birds, 74 were 

 white and 9 were pigmented. Davenport states, however, that one of the Leg- 

 horns used (B) in this cross gave all the dark progeny, while the other two Leg- 

 horn 9 9 (A and C) gave only white. 



To the above cases in which the W. L. 9 was used, Hurst (1905) 

 adds the following cases : 



7. Houdan d X W. L. $. Results: 94 whites and 11 blacks. Of the 

 blacks there were 6 pure blacks (99) and 5 barred ( cT cT). 



8. Black Hamburg cT X W. L. 9. Results: Of 57 individuals (in down- 

 feathers) 49 were white and 8 were bl&ck. 



Regarding the eight instances reported by Davenport and by Hurst, 

 the following may be said : 



Instance 1. — Davenport's W. L. Bantam cf was undoubtedly 

 heterozygous for both B and I. The pure-bred W. L. cT must be 



