442 



Journal of Agricultural Research 



Vol. XX, No. 6 



the grain weevils of this genus. The lengths of the various stages are 

 regular and are given in Tables I and II. 



Table I. — Life history data of the tamarind pod-borer 1 



1 Data included in tables were secured at Orlando, Fla., during June and July, 1919. The mean tem- 

 peratures for period were as follows: June, average mean temperature 79.4 F., high mean 90. 5 , low 

 mean 68.3°; July, average mean temperature 81. 4° , high mean 92.4°, low mean 70.3°. 



Table II. — Length of stages of tfie tamarind pod-borer 



The pearly white larvae, when full grown, construct pupal cells within 

 the seed by lining the cavities at the end of their larval burrows with a 

 mixture of frass and borings cemented together with a secretion that 

 gives it when dry the appearance and consistency of a dark brown 

 shellac. 



As shown in Table II the larval stage usually requires from 12 to 14 

 days. After a prepupal stage of about 1 day the pupal form is assumed, 

 and 7 days later the adult is formed. The adult does not immediately 

 leave the seed but remains within to harden and feed for a few days. 

 It then makes its way to the original cavity made by the mother weevil 

 when laying her eggs and emerges, rarely if ever forcing its way through 

 the shell at any other point. 



After the adults have all emerged little is left of the seed but the empty 

 shell and a mass of powder. 



