308 RiEroRT OF the Department of Entomology of the 



Table IV. — Number of Laev^ Produceb by Seven Females with Daily 



Record of Each." 



molting: how acoomplished. 



Laboratory observations upon individuals from which the scale 

 had been removed showed that in molting the skin splits along 

 the anterior margin and for a short distance along the lateral 

 margins. It is then forced off the posterior end of the body by 

 the motions of the segments. 



The following observations upon the molting periods are from 

 320 males and females kept in the laboratory. For convenience 

 they were divided into lots as follows: 



Lot 1 consisted of 160 larvae born September 4. September 17 

 one larva showed first molt. About half the remainder did not 



"Numbers in Italics repa'eseut number of larvoe born when observations 

 were commenced. 



