WHITE LEGHORN AND DARK BRAHMA. 



37 



iu both sexes, among many other breeds. The hackle of the female Dark 

 Brahma (fig. i8) differs from that of the male in that the broad black center 

 is barred, or penciled, with straw color. 



3. Wing Bow.— The wing ^rt/- is described for the male at page 32. In the 

 male Dark Brahma the feathers of the fourth and higher rows of wing coverts 

 have their distal halves white forming the wing bow. No such distinct wing 

 bar and wing bow occur in the female, the feathers of this region being 

 uniformly penciled like the others. 



MATERIAL. 



There are two sets of experiments in this series. In the firsl sct\.\iQ mothers 

 were White lyCghorn Bantams, Nos. 127 and 128, probably heterozygotes 

 with black, further discussed at page 39. The paternal Dark Brahma, 

 No. 122, has been already referred to at page 34. In the second set the 

 mother was Dark Brahma, No. 121. She has the same history as No. 122. 

 She is a prettily penciled bird (fig. 18). The father was White Leghorn 

 Bantam, No. 126, described at page 39. 



RESULTS. 



Of the first set 19 offspring are recorded, including 8 in the shell. Females 

 8, males 5. Of the second set 27 are recorded, including 8 in the shell. 

 Females 14, males 4. 



I. General Plumage Color. — The result differs in the two sets and the 

 two sexes, and it is otherwise variable. 



The results are explicable on the hypothesis that all of the White Leg- 

 horn Bantams, Nos. 126 S , 127 $ , and 128 ? , contain white gametes and 

 also gametes bearing red pigment, black pigment, and the barred pattern. 



3. Wing Coloration. — In the first set the wing coloration is like that of 

 the plumage in general, except that in the females marked like the Dark 

 Brahma the coverts contain much red (fig 23). 



Scco?td set. Of 7 prevailingly white hybrids three show red or buff on the 

 wings ;t of the 5 black-and-white (penciled) birds all but one show red or 

 purple on the wings ; of two adult black hybrids one shows buff. Three other 



*Fig. 23. 



t Fig. 25, Plate viii. 



