Analysis of Hbteeogeneity in the Population 



301 



In the season of 1907 the first generation showed a curious reduction of the 

 line composed of biotypes 1, 2, 3, and 4; 1 and 3 were entirely absent in the 



9 21 44 



19 

 1055 Males. 



Total 4221. 2266 Females. 



FiQ. 105. — Census of first annual generation at Puebla in 1906, sbowing same 

 array of pattern conditions present In figure 104, but somewhat decreased In 

 amount of fluctuating variability. 



46 Jib 14 S4|p 12 6 



29-#> 1 sso^it ! i 



'81 -» (■! 'e^ 9lh\-X.^ '^'^L 



106 -^ J » 84--.^X.---^'~''' ^' 



98— « 77---^l-rr^ , 



«^- * **— -^>-%- M 158 



97— m m 109 106 .__^,^ jgl 



81-- «*>«!. £11 129 "^'feP'*- 177 



im «fr _-_3i9 £Pft^. -318 



«*■*«►- 141 ■** ** ^- 146 



* If- 92 V^* 24 



/ »* 46 '"*\f.^^ 39 



18 $31 44 



1787 Males. Total 3695. 1908 Females. 



Fio. 106. — Census of second annual generation at Puebla In 1906, sbowing a 

 restriction in tbe array of pattern conditions, the appearance of isolated groups 

 and Increased fluctuation in the line composed of biotypes 1, 2, 3, and 4. 



males, ■while 1 was present and 3 and 3 absent in the females. The same condi- 

 tion prevailed in the second generation of this year, where biotype 1 was present 

 in both sexes, but 2, 3, and most of 4 were absent, as were also 10, 11, and 13 in 



