Smithsonian Report, 1951. Wigglesworth 



PLATE 3 



Figure 1. — Pupae of the silkworm, a. From larvae in which the corpora allata were 

 extirpated in the 3d stage; b, from larvae similarly treated in the 4th stage; c, from normal 

 larvae pupating after the 5th stage. X 1.5. (After Fukuda.) 



Fi(;uRE 2. — Cocoons of silk containing the three pupae shown in figure 1 (abo\'e). X 1.3. 



(After Fukuda.) 



Figure 3. — Silkmoths derived from the three pupae shown in figure 1 (above). Natural size. 



(.•\fter Fukuda.) 



