Explanation of Plate 22. 



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

 Leptinotarsa. 



Fig. 1, Calligrapha intermedia. 

 Fig. 2, Zygogramma clathrata (two 

 varieties). 



Fig. 3, Zygogramma ornata (two varieties). 



Fig. 4, Leptinotarsa hogei. 



Fig. s, Leptinotarsa dahlbomi. 



Fig. 6, Leptinotarsa haldemani. 



Fig. 7, Leptinotarsa heydeni. 



Fig. 8, Leptinotarsa lacerata. 



Fig. 9, Leptinotarsa stali. 



Fig. 10, Leptinotarsa fiavopustulata. 



Fig. 11, Leptinotarsa belti. 

 Fig. 12, Leptinotarsa dohmi. 

 Fig. 13, Leptinotarsa evanescens. 

 Fig. 14, Leptinotarsa ehalcospila. 

 Fig. 15, Leptinotarsa puncticollis. 

 Fig. 16, Leptinotarsa modesta. 

 Fig. 17, Leptinotarsa litigiosa. 

 Fig. 18, Leptinotarsa tlascalana. 

 Fig. 19, Leptinotarsa Ubatrix. 

 Fig. 20, Leptinotarsa cyaneseens. 

 Fig. 21, Leptinotarsa violeseens. 



