330 



The Mechanism of Evolution in Leptinotaesa 



14-1 

 18- 



24 -^ 



12 ^ 



■31 m 



33 



29- 



16 



-m 



1^ — 11 



W> 46 



31 



Wl^ 55 



m 61 



42 —^ m 74 



177 



W- 51 



42. 



14 



' \ ■*■ 

 / \ \ <^ 31 



U 4 9 



Population 830, First Generation. 



19 

 15-- 



20 



31 



42 



14 



14 



19 



11 r^ ^ 



5 _^ ^_. 



..jii 



m 



I 



1 « 5 7 



Population 901, Second Generation. 



^-4 

 ^---1 

 — 12 



!> 38 



35 



40 



41 



83 



96 



211 



86 



,45 



Fig. 149. — Census stiowing conditions in tlie first and second generations In 

 1907 at Chapultepec test colony. 



4 5 



7-- 



9 



11 



21 



44 



48 



71 



-m 



m- 

 m- 



^ m — 



^S^-9 



»— 5 



(^ 7 



- 46 

 -•83 

 -92 



-•77 



— 43 



11 



-^m 



1 — 



42 m^ 



m — 4 

 -^ m — 1^ 

 -■m m — ^ 

 ^ (® 8^ 



51 



^ 4 



Population 697, First Generation. Population 370, Second Generation. 



Fig. 150. — Census showing conditions in first and second generations in 1908 

 at Chapultepec test colony. 



