Miastor ? americana Felt 



Living embryo within a small, yellowish larva. Note the distinct germinal 

 streak with its broad projection to one side near the anterior third, and the 

 cephalic cap of fuscous cells, x lOO 



The same embryo photographed 24 hours later and showing some change. 

 This photograph was relatively not as good as the first, x 100 

 The same embryo several days later showing the condition after disintegra- 

 tion has begun, x 100 



A larger embryo in a small, yellow mother larva extending from her fifth 

 to eighth body segments. Note the great extension of the ectoderm from 

 about the anterior fourth to the posterior fifth, and the cephalic cap of 

 dark cells, x 100 



Empty skin of a portion of a mother larva. The irregular, dark, longitu- 

 dinal lines represent tracheae while the transverse fuscous bands are spines 

 on the segments, x 100 



168 



