Knight, H.H. 1952. Review of the genus Perillus with description of a new species (Hemiptera, Pentatomidae). Annals of the Entomological Society of America 45(2): 229–232.

Abstract

The writer's interest in the genus Perillus dates back some 37 years when in August, 1913, near Batavia, N.Y., he first observed the red and black male of Perillus bioculatus Fab. mating with the white and black female form, clanda Say. There followed three years of breeding work to learn something of how color pattern might be inherited in this species. This involved a detailed study of the biology of this species, results of which came to publication in 1923. At the close of World War I the writer moved to the University of Minnesota where research on the nature of color in Hemiptera was resumed under favorable circumstances. This work culminated in the publication of results, with a colored plate (Knight, 1924). Briefly, this work showed that Perillus bioculatus Fab. is highly variable in color pattern, ranging from the white and black clanda Say to nearly solid black males in the extreme dark forms.