ZENAIDURA AND ITS CROSSES WITH ZENAIDA AND HYBRIDS. 



117 



This group of birds, like other groups already considered, indicates, therefore, 

 that in females of pure species — not hybrid — the order of the eggs in the clutch is 

 correlated with sex. There are, too, plain indications here as elsewhere that not 

 only does the act of (wide) hybridization affect the sex-producing capacity of a 

 given pair or group of eggs from pure parents, but in the resulting hybrids the 

 normal relations between sex and the order of the eggs is also affected or modified. 



Table 8'J. 

 Pair A. 

 cT Zen, caroliuensis (2) ; from dealer (very young) in 1806. 

 9 Zen. carolinensis (2) ; from dealer (very young) in 1S96. 



cTA 1. 4/26/97 alive 4/29/99 24+ mo. 



9 A 2. 4/28/97 escaped 4/29/99 .... 24+ mo. 



cTB 1. 5/27 hatched. D 1. 7/14 dead 8/4/97 at 6 days. 



9B2. 5/29 hatched. c? D 2. 7/16 killed 10/16/97 .3 mo. 



C. 6/26 thin shell, broken. 9E 1. 8/18 dead 7/20/98 11 mo. 



9E2. 8/20. 



.dead 10/20/97 2i 



9 Zen. carolii 

 • two clutches lai( 

 6/8/98 hatched. 



ith 



Pair C. 



-^kVr, 5/11/97; brother; (death ?). 



-A 2); 5/13/97; sister; escaped 4/29/99. 



ill shells," then: 



cfC 1 



9C: 



dead about 7/20/98. 



6/10/98 hatched dead about 7/20/98 . 



7/10 hatched dead 8/20/98 



7/12 hatched dead 8/20/98 



8/4 hatched dead 10/28/98 



. 8/6 hatched (kiUed) 1/4/99 



.6 weeks. 

 .6 weeks 

 ...41 da 



. . .3 mo. 



.5+ mo 



4/26/99; probably did not hatch. 

 4/28/99; probably did not hatch. 



