210 



A. H. STURTEVANT. 



The mating together of blacks should produce only blacks and 

 a few chestnuts, since chestnut is the only color hypostatic to 

 black. However it does produce some browns and is recorded 

 as producing occasional bays. The bays so far found are: Kip- 

 ling 2 :2i^, by Gambetta Wilkes ex Margaret W., and Gipsey Bel 

 2 130, by St. Bel ex Gipsey A. Now there is some reason to doubt 

 the color of St. Bel. His dam was the black Beautiful Bells, 

 but his sire was the bay Electioneer, and he is the only black 

 among the eleven foals by Electioneer from black mares that I 

 have found. Moreover, counting St. Bel, I have found only 

 two black foals out of a total of 52 from Electioneer. Since 

 Electioneer was homozygous for Hurst's factor this small pro- 

 portion cannot be partly explained by supposing that more of the 

 52 would have been black had they had that factor. Neither 

 is it possible to suppose that the small proportion is due to sup- 

 pression by the gray or roan factor, since the 52 include only 

 two grays and no roans. It looks very much as though Elec- 

 tioneer were homozygous for the bay factor. St. Bel died young, 

 leaving few foals, so that I have been unable to get much data 

 about his descendants. As to the other apparent exception, 

 Kipling, I shall only call attention to the fact that neither he 

 nor his dam are very well known. The following table shows 

 foals from two black parents. 



The case of foals from heterozygous sires and black mares is 



