EXPI^ANATION OF Pl^Al^E 22. 



This plate illustrates the orthogenesis in the color patterns of the elytra in the genus 

 L,eptinotarsa. 



Fig. I, Calligrapha intermedia. 

 Fig. 2, Zygogramma clathrata (two 

 varieties). 



Fig. 3, Zygogramma ornata {two Y2i.r\t\Ats). 



Fig. 4, Leptinotarsa hogei. 



Fig. 5, Leptinotarsa dahlbomi. 



Fig. 6, Leptinotarsa haldemani. 



Fig. 7, Leptinotarsa heydeni. 



Fig. 8, Leptinotarsa lacerata. 



Fig. 9, Leptinotarsa stali. 



Fig. 10, Leptinotarsa Uavopustulata. 



Fig. II, Leptinotarsa helti. 

 Fig. 12, Leptinotarsa dohrni. 

 Fig. 13, Leptinotarsa evanescens. 

 Fig. 14, Leptinotarsa chalcospila. 

 Fig. 15, Leptinotarsa puncticollis. 

 Fig. 16, Leptinotarsa modesta. 

 Fig. 17, Leptinotarsa litigiosa. 

 Fig. 18, Leptinotarsa tlascalana. 

 Fig. 19, Leptinotarsa lihatrix. 

 Fig. 20, Leptinotarsa cyanescens. 

 Fig. 21, Leptinotarsa violescens. 



