SEX-LIMITED HEREDITY IN CERTAIN CROSSES. 149 



A 1. 2/27/10; shell weak, broTien. B 1. 4/6; failed to hatch. 



A 2. 3/1/10; shell weak, broken. 9 B 2. 4/8; RD 9; light blond; 7/24/13. 



Pair 3. 

 Another 9 St. douraca given Ma.v, 1910 (untag.; when or whether dead not known). 



9A1. 6/1/10 RD 10 light blond dead 6/4/11 12 mo. 



9 A 2. 6/3/10 RD 11 light blond dead 5/24/12 24 mo. 



B 1. 7/17 RD 12 . . light gravish l>lon(l dead or disappeared before 2/5/11. 



<j'B2.7/19 RDi:i, - liixlit <:iayisl, 1,1, .11.1 killed 10/23/13 39+ mo. 



cfCl.8/26 RDM .. . liL^ht ni.vi^h M...,.l . killed 10/23/13 38+ mo. 



(^0 2. 8/28 RD 15 lisiht gnivi.sh 1,1.. u.l dead 9/18/14 49 mo. 



(P 12, XX 11) 

 ' This bird was [irohably contaminated with .S7. alba, though importcd'as pure blond. — EniTon. 



Table 137.— Resulls of maling risoria-alba X douraca hybrids inter se. 

 Pair 1. 

 (S' Risoria-alba X douraca hyb. (3) ; 11/17/12; brother; dark. 

 9 Risoria-alba X douraca hyb. (8); 9/3/12; sister; white. 

 A 1. 3/10/10; white; full term embryo.' , ^, „ D 1- 7/23. . . . RD 3-D. . . dark)5/26/13 d'. 

 A2. 3/12/10; white; full term embryo. ° '^"'^ ^ D 2. 7/25. .. .RD 3-D. .. .dark/3/25/13 9. 

 Bl. 5/20; some development. 9E1. 9/19. .. .RD 3-E ... .white;dead 2/17/11. 

 B 2. 5/22; some development. E 2. 9/21; no development. 

 1. 6/10; some development. 9 F 1. 10/9; dark; dead 11/26/13. 

 C2. 6/12; some development. cTF 2. 1 0/11; white; dead 11/16/11. 



Pair 2. 

 d' Risoria-alba X d.,iira.a li.\l.. (7) ; 10 '(I '09; 4/20/12; brother; very dark. 

 9 Risoria-alba X.l..ui:i.:i l.yl.. iCi; ^ 1-' (19; 7/19/12; sister; white. 



A 1. 3/7/10; developed, failed to pii.k ^ll.■ll; .• |.l.xi.,ii light. 



A 2. 3/9/10; developed, pricked shell, failed; complexion dark. 



B 1. 5/12 RD 7-B dark, disappeared before 11/4/13. ^ 



9 B 2. 5/14 RD 7-B lighter 10, 2S 11 17^ mo. 



, o C 1. 7/5 RD 7-C dark \one dead 8/7/11 13 "«>■ 



" ^ C 2. 7/7 RD 7-C lighter/one before 11/4/13 ? nio. 



cTD 1. 8/20 RD7-D lighter 3/15/13 31 mo. 



D2. 8/22 RD7-D dark probably died earl.v. 



E 1. 10/10 RD 7-E light risoria ll/8/lO (cold). 



E2. 10/12 RD7-E light risoria 11/7/10 (cold). (!•) 



1 This clutch was ilrsertcd. 



BLOND AND WHITE RINGS CROSSED WITH RED RINGS. 



The red ring-dove (St. hutnilis) is a much darker bird than the blond ring. It 

 has a pronounced vinous-reddish cast, and the unfeathered young have a decidedly 

 dark complexion. An adult male and a juvenal mak> arc figured in pi. 21. In 



