aon DAVID DAY WHITNEY 
TABLE 8 
Showing by the comparative reproduction rates that crossing the two races A and B 
causes a reinvigoration of the ensuing hybrid race 
° A 408 X B 2NnD 
FERTILIZED EGGS FROM THE PROBABLE CROSSING OF RACE A, | D 
PARTHENOGENETIC GENERATION 408 + AND RACE B, NEW PARTHENOGE- 
AFTER INBREEDING TWICE, IN A MIXED CULTURE NETIC WILD RACE 
OF THE TWO RACES IN A BATTERY JAR 
: | 
ae ee Bee Peis Offspring of daughter | Parthenogenetic 
fertilized eggs | isolated eee 
No. | Time 1911 | Time 1911 | No. | Time 1911 No.| AY: |, 228 ae an 
| | no. Oo sigs || ce Oe 
1 |M. 5-22 | Eve. 5-24| 5 |AM.5-27| 53/106 | 5 62 | 12.4 
2|M. 5-22|Eve. 5-24) 5 |AM.5-27| 62 /12.4 | 5 62 | 12.4 
3 | Eve. 5-22 | Eve. 5-24 5 | AM. 5-27 | 54 /10.8 | 5 62 12.4 
4 | Rive. 5-22 | Eve. 5-24 | 3 |AM 507/422 114 | 5 62 12.4 
5 | Eve. 5-22 | Eve. 5-24 | 5 | A.M. 5-27| 46 | 9.2 | 5 62 12.4 
6 | Eve. 5-23 | Eve. 5-27 | 5 | Eve. 5-29 | 15 3 5 40 8 
a al Eve. 5-23 | Eve. 5-27 | 5 | Eve. 5-29 31 6.2 5 | 40 8 
8 | Eve. 5-23 | Eve. 5-27 | 5 | Eve. 5-29 | 48 | 9.6 5 | 40 8 
9 | Eve. 5-24 | Eve. 5-27 5 | Eve. 5-29 31 6.2 5 40 8 
10 | Eve. 5-24 | Eve. 5-27 | 5 | Eve. 5-29 | 40 | 8 ee 8 
11 | Eve. 5-24 | Eve. 5-27 | 3 | Eve. 5-29 @ i 2 Sian) 8 
12 | Eve. 5-24 | Eve. 5-27 | 3 | Eve. 5-29 21 Uf 5 40 8 
13. | Eve. 5-24 | Eve. 5-27 4 | Eve. 5-29 35 8.75 5 40 8 } 
14 | Eve. 5-24 | Eve. 7-28 | Large 9 alive. | No young. | | Sterile 
15 | Eve. 5-24 | Eve. 5-27 2 | Eve. 5-29 15 7.5 5 | 40 8 
16 | Eve. 5-24 | Eve. 5-27 4 | Eve. 5-29 24 6 5 40 8 
17 | Eve. 5-24 | Eve. 5-27 | 3 | Eve. 5-29 17 5.66+- 5 40 8 
18 | Eve. 5-24 | Eve. 5-27 5 | Eve. 5-297) 11 30) 5 40 | 8 
| s | feos’ 
18 72 551 7.6+ | 85 790 9.2+ | Summary 
| | 
| | | 
17 he) 551 7.6+ 10 102) 11052 Summary 
| of exact 
| number of 
individuals 
| | used 
14 59 519 8.79 10 102 10.2 Summary 
after elimi- 
| nation of 
| nos: Gl 
and 18. 
