314 



The Mechanism of Evolution in Lbptinotaesa 



.41. f^ 



'^^M 



196 



214 



1^ ^«^^| 319 



/ / ' "^ ^m — 111 



57 29 

 1034 Males. 



Total 2304. 1270 Females. 



Fig. 124. — First census at San Marcos In 1904, showing condition In the pro- 

 notal pattern. 



79 



31 85 



1385 Males. Total 2466. 1081 Females. 

 FiQ. 125. — Second census at San Marcos In 1004, 



-11 



24 Si 97 

 1550 Males. 



41214 



Totel 3032. 1473 Females. 



Fio. 126. — ^Flrst census at San Marcos In 1905, showing Increased 

 pattern conditions and existence of an isolated gronp in blotype 12. 



array ot 

 14 



\ 



22 "X31 

 2105 Males. 



Total 3716. 



12 17 

 1611 Females. 



Fio. 127. — Second census at San Marcos in 1905, showing condition in the popu- 

 lation as a whole and the existence of two Isolated groups in I>oth sexes. 



