COLORATION IN POLISTES 



PL. 



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. pallipes. 



Figs. 28 and 29. Two stages in the development of the pattern of the ventral side P. variatus. 



Figs. 30 to 32. Successive stages in formation of the color pattern in the pupa of P. generosus. 



