Bu'. 100, Bureau of Entomology, U. S. Dept. of Agriculture. 



Plate I. 



Shedding and Retention of Forms on the Cotton Plant. 



Fig. 1.— a, b, e, Normal scar.s left by shed forms. Fig. 2.— a, b. r, Abnormal scars with forms 

 retained. Fig. 3. — a. Longitudinal section through base of shed form; 6, Longitudinal 

 section through base of retained form. Fig. 1, natural size; fig. 2, somewhat reduced; 

 fig. 3, enlarged two diameters. (After Hinds.) 



