Analysis of Hetbeogeneitt ik the Population 331 



7 4 3 14 



17 w^> \ \ V ^ 25 26—^ / 



26— -<^\\g ^ 86 Bi„., 



28— —^\g «5^ -104 42-.--^ / ^ 7 



44 -^®J m- Ill 31 -^ ^ @gH 34 



2 



39 -.5^ ^J. 92 20 -^SfiJ) ^ 161 



42 —^ ^)- 171 - - 



34 ^l9 1^1 217 



(^_ 214 ^ 318 



@^ 119 ^ ^^^ 



^. 42 ^^ 12 



@S) 1 



1203 Males. Total 2327. 1124 Females. 



Fig. 144. — Second annual generation at Chicago In 1906, showing the pronotal 

 pattern as far as observed. 



12 11 4 - 



^. 314 18--—^^ 218 



^ 211 m--- 326 



^— 86 ^ ^ 



1271 Males. Total 2568. 1297 Females. 



Fig. 145. — First annual generation at Chicago in 1907, showing the pronotal 

 pattern. 



11 7 112 4 



\ \ III/ 



S--^\\ @!U„i7 ^/// 



9.-^.$iP ^_....66. „,..^ ffisa'/ ,^-8 



5®- — 's 



,-^: v^ 66- 27— ^«^ «i»J)/ fisa „ 



— -^- ^---'- :.-S9"'^::i;S 



-IsS^ ^L <141 



'^ 176 



fj.^ -144 



46 -^ ^ ..-191 



^1. ^317 



^ 1(^ ^- 45 



.193 ^ 81. 



@ 22 



^^ 86 



(JJBJsl 26 



C©— 74 

 1163 Males. Total 2265. 1102 Females. 



Fio. 146. — Second annual generation at Chicago in 1907, showing the pronotal 

 pattern. 

 22 



