Bui. 50, Bureau of Entomology, U. S. Dept. of Agriculti 



Plate VI. 



Variation in Color and Markings in the Bollworm, 



Fig. 1, Dark-colored bollworm resting on leaf of cotton plant: fig. 2, three larv?e. seen from the 

 side, showing color types — upper larva, green: middle, rose; and lower, dark-brown colored: 

 fig. 3, five larvae, showing color variation, seen from above; fig. 4, dorsal pattern of markings 

 of dark-brown colored larva — figs. 1-3 enlarged twice; fig. 4 four times (original). 



