Constitution of the White Leghorn Breed. 157 



blacks, 8 were cockerels and were pullets, so that the correlation of 

 black with 9 and cuckoo with cf in Fi was not maintained in F2." 

 Hurst states further that ''the cuckoos were precisely similar to those 

 of Fi, having a gray-white ground barred with blue-black, with odd 

 black or white feathers. . . . The blacks were of two t>T>es, 

 dark Houdans and Craves, suggesting that the cuckoo male parent 

 was giving off black gametes. No dominant whites appeared in this 

 mating, suggesting that the cuckoo male parent was not giving off 

 dominant white gametes." 



It is interesting to note that the cuckoo cf mentioned above sub- 

 sequently moulted into almost clear white, only one feather on the 

 back being tipped with gray. 



Besides the Houdan X White Leghorn cross, Hurst also crossed 

 Black Hamburg cf with Wiite Leghorn 9 . The progeny comprised 

 49 whites and 8 blacks; of these one was apparently clear white, 48 

 were ticked with black, and 8 were black with whitish throats. None 

 of these chicks were rai.sed for further observation, and Hurst draws 

 no conclusions regarding the origin of the barred pattern described. 



Davenport (190G) has also described a type of barring which 

 appeared when certain black and white breeds were crossed, lii 

 these matings dominance of white was the usual result. Two White 

 Leghorns crossed by a Black Minorca proiluced in Fi only white 

 birds, the 99 having some black feathers White Leghorns crossed 

 with Houdans gave only white progeny This result is at variance 

 with Hurst's mentione<l above. Wiite Leghorns crossed with Red- 

 backed game had ''white offspring with some buff on breast." "On 

 the other hand," Davenport continues (p. 75), "the white color of 

 the Silky dominates over the dark color of the Frizzle in about only 

 23 per cent, of the hybrids." 



Davenport states further that no barring resulted from crossing 

 White Leghorn with Houdan or with Black Minorca. Barring in the 

 male progeny did appear, however, in matings between the Tosa 

 fowl and White Cochin, between White Leghorn Bantam and Dark 

 Brahma, and in matings between White Leghorn Bantam and Rump- 



