Enteman, Wilhelmine M · Washington : Carnegie Institution · leaf 22
COLORATION IN POLISTES PL. Il … W. M. ENTEMAN, DEL, HELIOTYPE CO., BOSTON. DEVELOPMENT OF THE COLOR PATTERN IN POLISTES Fig. 19. Pupa of P. Variatus about eight days before emergence. Figs. 20 to 25. Successive stages in the formation of color pattern of P. variatus. Figs. 26 and 27. Final stages in formation of pattern in P.…
Insects -- Color · Wasps
Internet Archive · Gerstein - University of Toronto · Public domain (published before 1931). Free to use for anything.