FIG. XIII. Ventral view. 66-68 hours. The second maxillae 

 (2M.v) have begun to unite to form the labrum, bringing to- 

 gether the previously separate external openings of the silk 

 glands (SlkGl). 



FIG. XIV. Ventral 

 virtually completed. 



view. 72-76 hours. Development 



FIG. XV. Lateral view of newly hatched larva. 



