PLACK VAEIATION. 



lOI 



Tabi,e 37 — Continued. 



(C) VARIATION IN PROPORTION OP I,IGHT TO DARK COI^OR IN THE EI<YTRA. 



Year. 



Gener- 

 ation. 



Class. 



I 



2 



3 



4 



5 



6 



7 



8 



9 



10 



II 



12 



13 



14 



15 



16 



17 



18 



19 



20 



1903 . . 



1904 { 



1905 { 



2. . . . 

 I. . . . 



2 



I 



2 













• • 



•• 



6 



12 



I 

 2 



21 

 5 



4 

 4 



4 



45 



23 

 28 



32 

 36 



12 

 55 

 50 

 40 

 39 



3 



14 

 15 

 21 

 20 



I 



3 

 2 

 I 



] 

















(D) VARIATION IN PROPORTION OF UGHT TO DARK COI,OR IN THE VENTRAL ABDOMINAt. 



SEGMENTS. 



1903.. 



1904 { 



1905 { 



2 



I 



2 



I 



2 











i 

 1 



..... 



. . j . . 





•• 

















• • 



I 



I 

 1 



I 



I 



5 



I 

 I 



100 

 98 

 93 

 99 

 98 



Table 38. 



■Place variation in the proportion of light to dark color in the elytra of 

 L. dilecta at Piiebla, Puehla, Mexico. 



1903 

 1904 







Class. 



i 



Gener- 

 ation. 



















6 



7 



8 



9 



2 



I 



7 



84 



8 



2 



6 



II 



72 



II 



In some of the species of the genus, as, for example, in L. signaticollis, 

 there is relatively little place variation. In the individuals of this species 

 which were obtained at Cuernavaca in the years 1903, 1904, and 1905, 

 almost no variation is found from year to year in the color proportion of the 

 epicranium and pronotum, and no change of mode. (See table 36.) For L. 

 undecimlineata, found at Orizaba, Mexico, in the years 1903, 1904, and 1905,^ 

 there appears a low place variation, with no modal change of the parts or of 

 the entire species. (See table 37.) In L. dilecta, found at Puebla in the 

 years 1903, 1904, and 1905, there is no place variation in the color of the 

 pronotum, nor in size, but considerable is found in the elytra, with slight 

 modal fluctuations. (See table 38.) 



Enough data has been presented to show conclusively the existence of place 

 variation in this genus of beetles, and also that some species are more variable 

 in this respect than others. It is perfectly obvious, therefore, that in any 



^The records for 1906 at Orizaba, Mexico, show no change in the place variation of 

 L. undecimlineata. 



