Determinate evolution in the color-pattern of the lady-beetles.By Johnson, R.H.
All of the American coccinellids which could be obtained in numbers and which showed a variable color-pattern were studied, viz, Hippodamini, Coccinellae, and Epilachnini, divisions employed by Casey (1899).
Johnson, R.H. 1910. Determinate evolution in the color-pattern of the lady-beetles. Carnegie Institution of Washington, Publication No. 122. iv + 104 pp.