314 



The Mechanism of Evolution in Leptinotaesa 



.4L l^^te-— -196 



/ 



29 



/ 

 38 



57 29 

 1034 Males. 



Total 2304. 



77 

 1270 Females. 



/ ^W"--^^^ 



92 104 



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

 notal pattern. 



m^ 



^^fcfe^— 479 



/// XW"^ 



^p^^V^- 46 



^^-^^^^t- 541 



24 31 85 



25 11 81 56 92 



1385 Males. Total 2466. 1081 Females. 

 Fig. 125. — Second census at San Marcos in 1904 



--11 



21 ^||, 



86 ^^ 



441 liH 



106 

 219 



441 ^H^^^^^^^^^^^.^ 



'47 21 44 



24 51 97 

 1559 Males. 



Total 3032. 



Fig. 126. — First census at San Marcos in 1905, showing increased 

 pattern conditions and existence of an isolated group in hiotype 12. 



array of 



22 131 

 2105 Males. 



106 % 



/ / ^ 



12 17 



Total 3716. 1611 Females. 



Fig. 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 both sexes. 



