Explanation of Plate 17. 



This plate illustrates the changes in the coloration exhibited by the larvse of several 

 species of Leptinotarsa during their ontogeny. 



Figs. 1, 2 and 3, L. undecimlineaia Stal. From Tierra Blauca, Vera Cruz. 



Figs. 4, 5, and 6, L. diversa (n. sp.). From Guadalajara, Jalisco, Mexico. 



Figs. 7, 8, and 9, L. signaiicollis Stal. From Cuernavaca, Morelos, Mexico. 



Figs, io, 11, and 12, L. multitceniata Stal. From Guadalupe, Federal District, 

 Mexico. 



Figs. 13, 14, and 15, L. oblongata (n. sp.). From Cuernavaca, Morelos, Mexico. 



Figs. 16, 17, and 18, L. rubicunda (n. sp.). From Toluca, Mexico, Mex. 



Figs. 19, 20, and 21, L. dccemlineata Say. From Chicago, Illinois. 



Figs. 22, 23, and 24, L.junda Guer. From Experiment, Georgia. 



Figs. 25, 26, and 27, L. haldemani Stal. From Cuernavaca, Morelos, Mexico. 



Figs. 28, 29, and 30. L. dilecia Stal. From Cuernavaca, Morelos, Mexico. 



Figs. 31, 32, and 33, L. violescens Suffr. From Orizaba, Vera Cruz. 



Figs. 34, 35, and 36, L. rubiginosa Rogers. From Santa F6, Federal District, 

 Mexico. 



