we 
‘ 
86 
84 
82 
80 
78 
76 
74 
72 
7O Ca el Sas 
28 
2 
3 
~ 
nu 
Fig. 3 The emergence Of 79 males and 60 females of Samia cecropia; New 
York, 1911 material. 
=n ow A GO DN DO 
28 
um % 
Fig. 2 The emergence of 171 males and 168 females of Samia cecropia; St. 
Louis, 1911 material. 
Fig. 4 The emergence of 72 males and 90 females of Samia cecropia; incubator Fig. 5 The emergence of 116 males and 67 females of Callosamia promethea; 
material, 1911. Créve Coeur Lake, 1911 material. 
THE JOURNAL OF EXPERIMENTAL ZOOLOGY, VOL. 12, No. 2 
