io8 



VARIATION IN I^JSPTINOTARSA. 



Table 4i.~Geo graphical variation in the epicranium of L. multitcBniata, oblongata, 

 intermedia, decemlineata, rubicunda, and melanothorax. 



Class... 







Per cent of 



frequencies 







No. 

 of 

 gen- 

 era- 

 tions. 



I 



2 



3 



4 



' 



6 



7 



8 



9 



10 



L. multitceniata: 

 Guadalupe . . .. 





I 

 I 

 



7 

 5 

 3 



2 



8 



7 



8 



9 

 13 

 14 



7 

 II 

 14 



7 



68 

 60 



73 

 80 



I 



10 

 17 

 24 

 27 



\l 



27 



12 



II 

 14 

 10 



9 

 5 



14 



21 



34: 



35 



18 



il 



23 



2 



3 



I 

 I 



15 



20 

 30 



12 

 14 



12 

 33 



I 

 I 



31 



8 

 6 

 I 



34: 



8 

 2 

 15 



2 



I 



6 



t; 

 4 

 3 

 5 

 4 

 2 



4 



I 

 4 



2 



5 



4 

 5 



I 

 2 



4 

 5 

 4 



7 

 3 



2 



5 



16 

 6 

 4 



7 

 3 

 8 

 2 



4 



2 

 2 



Tacubaya 







San Angel 





Tlalnepantla . 







3 



I 



Puebla 











I 

 1 



I 



5 



5 

 11 



17 



'7 



Atlixco 





Toluca 





6 



L. oblongata : 



Oaxaca 





I 

 I 

 2 

 I 



3 

 4 

 3 



1 2 



Puebla 

















Cuemavaca 











L. rubicunda : 



Toluca 







73 



I 



6 



I 





L,. melanothorax 











98 



L. intermedia : 



Jalisco 





5 



15 



24 



58 



12 



60 



21 



14 

 I 



.. . . 



58 



54: 



15 



6 



21 



48 



51 



5 

 2 



3 

 13 



51 



58 



60 

 61 



48 

 47 

 63 

 60 



^ 



4:3 



50 



23 

 14 

 7 

 17 

 59 

 58 

 24 

 19 



20 

 14 

 19 

 19 

 14 

 19 

 5 

 21 

 26 

 22 

 20 



4 

 3 



I 

 I 













L. decemlineata : 



Arizona 



7 



i8 

 69 



14 



2 

 I 





















Western Texas 



I 

 8 



9 

 21 



li 



18 



20 



8 



9 



5 

 7 



1 



I 



14 

 10 

 12 

 12 











Hastern Texas 





I 

 2 



4:5 



18 



9 



I 

 4 



I 



I 

















Florida 





12 



4:7 



5 



I 

 5 



I 



I 

 10 



I 



I 

 2 



Georgia 







Virginia 









t/On"' Island . . 







I 





Kastern Massachusetts 













2 

 I 



I 

 2 



3 



4 



I 



2 



H 

 8 



2 



I 



I 



13 

 9 



13 

 i8 

 20 

 21 

 II 



d 



13 

 II 



lO 



14 







Nova Scotia . . ...i . . 









Ontario and western New 

 York 











Northern Ohio 



I 









Northern Illinois 



I 

 2 

 3 

 3 



I 



... 













Dakota 















I 







Kan'^as 



4 







Southern Illinois 



8 

 7 

 9 

 3 



I 

 2 

 2 







Southern Ohio 



Kentucky . 









I 





















In the data presented in tables 39 to 41 certain features of geograph- 

 ical variation are apparent. Some species are more variable than others, and 

 of these more variable species those of wide range are generally most vari- 

 able and those of limited range least variable. This, however, is not always- 

 true. Thus, undecimlineata appears in all of the tables as a wide-ranging spe- 

 cies, found from Mexico to Panama, yet it is relatively invariable ; whereas 

 dahlbomi is also a wide-ranging species found from Guatemala to Texas 

 and is highly invariable, although it lives in many different environments. 

 On the other hand, multitceniata is highly variable and decemlineata only a 

 little less so, while the species of the dilecta and haldemani groups present 

 only a moderate amount of variation. 



