90 ILLINOIS BIOLOGICAL MONOGRAPHS [484 



PLATE X 



Figures 123-134. Showing stages in the development of the pigment of the 

 elytra of C. purpurea limbalis Klg. (123-130), and in C. tranquebarica Herbst 

 (131-134). The wing areas are indicated by letters and numbers as in the pre- 

 ceding figures. 



Explanation of Plate 



Fig. 123. Three hours after emergence, showing the lighter areas between 

 the tracheae ; 124, after 8 hours — suggestion of both longitudinal stripes transverse 

 bands ; 125, showing a similar condition after 10 hours ; L26, similar conditions at 

 the end of 12 to 15 hours; 127, a similar suggestion of markings at 30 hours; 128, 

 well defined markings at 36 bours ; 129, striking longitudinal stripes at 36 hours ; 

 130, heavier pigmentation in the lines of the trachea in the adult ; 131 to 134, 

 showing a similar series for the development of pigment) in C. tranquebarica 

 Herbst; 131, 6 to 8 hours after emergence; 132, 10 hours after emergence; 133, 

 12 hours after emergence; 134, 24 to 36 hours after emergence. 



