Figure 59. Curve to show the relation between duration of larval stage and dura¬ 
tion of pupal stage. Solid line (-), pupae whose larvae required from 
twenty to thirty days to complete their development ; dotted line (.) 
pupae whose larvae required from thirty to forty days to complete their develop¬ 
ment ; dashed line (— —-) pupae whose larvae required from forty to 
fifty days to complete their development; dashed and dotted line (—. . —. .—) 
totals for all pupae observed. 
