RESULTS OF HYBRIDIZING RING-DOVES. 



315 



3. The eggs hatching. 



4. The period of incubation for each egg, when known. 



5. The sex and color of the nestling hatching from each egg. 



TABLE XXI. 



B., blond; W., white; K., died in egg; N. D., no development; ?, records uncertain. 



In the above table the period between laying and hatching is given, when known. In some cases, 

 as in mating 4, brood 2, this period is indicated in both days and hours. When no second egg was 

 laid, a zero appears. Both birds were stock blonds in matings 24, 27, and 38. Stock whites were used 

 in mating 25. 



