15 



The average measurements of the different instars of changas bred 

 from the egg and from individuals taken in the field are shown in 

 the following tables : 



Average measurements of changas. 



BRED FROM EGG TO ADULT STAGE. 



CAPTURED IN FOURTH INSTAR OR LATER AND BRED TO ADULT STAGE. 



NOTE. Inferior figures indicate the number of individuals averaged. 



MOLTING. 



Molting, as a rule, takes place underground in a cell constructed 

 for the occasion and similar in shape to the egg chamber, though the 

 process can be successfully accomplished above ground also. The 

 skin splits dorsally from the front margin of the thoracic shield to 

 about the third abnormal segment (PL I, fig. 2). First the thorax 

 and abdomen are freed, and finally the head, legs, and antennaB. The 

 entire process takes less than half an hour, and within two or three 

 hours the body has regained its normal colorations. For a week or 

 more before molting the changa is noticeably yellowish in color, and 

 the wearing off of the pubescence covering the body gives it a greasy 

 appearance. After molting the changa is dark brown to black, with 

 a fresh, velvety appearance produced by the new pubescent coat. 



Two males reached the adult stage with the normal tegmina of 

 this species, but with metathoracic wings aborted and completely 

 hidden by the fore wings. Not uncommonly changas in capacity are 

 found unable to free the legs and mouth parts in molting. 



