The following monthly results have been obtained by the end of 

 March (at the time of sowing the 1916 crop). 



Bolls were collected in fields under beans, wheat, barley, and 

 bersim, in the neighbourhood of Shibin el Qanater, on December 26, 19 1 5, 

 January 23, February 16, and March 18, 1916 (see Table I). 



About two hundred and thirteen bolk were examined in 

 December. These contained twelve small, five half-grown, and twenty 

 full-grown living larvae, besides two living pupae and ten empty pupa 

 cases of Gdechia. 



Three hundred and fifteen bolls were examined in January, 

 containing sixteen small, twenty-one half-grown, and forty-three full- 

 grown living larvae and eighteen empty pupa cases of Gdechia. 



Two hundred and forty-three bolls were examined in February, 

 containing five small, forty-seven half -grown, and fifty-two full-grown 

 living larvae and nineteen empty pupa cases of Gdechia. 



Two hundred and thirty-nine bolls were examined in March, 

 containing one small, four half-grown, and forty-nine full-grown 

 living larvae, two living pupae, and sixteen empty J pupa cases of 

 Gelechia. 



It will be noted that no living pupae were found in January or 

 February and that they again occurred in March. The pupae found 

 in March doubtless belonged to the hibernating generation of worms, 

 those found in December to the last maturing generation of the pre- 

 vious autumn. 



Attention is also drawn to the steady increase in the proportion 

 of the worms present in the bolls during December, January, and 

 February, and the obvious decrease in March. This decrease is very 

 probably to be considered in connection with the emigration of full 

 fed larvae previous to pupation. 



It becomes very obvious from the study of Table III that during 

 the winter months two generations of Gdechia larvae are found in the 

 bolls on the ground. 



The older of the two generations, the hibernating generation, 

 consists entirely of full-fed worms. These form about fifty per cent 

 of the total of worms found in December, January, and February ; 

 and without doubt compose part at least of the, eighty-eight per cent 

 of full-grown larvae found in March. There are, however, indications 

 that many of the worms of the hibernating generation must have 

 emigrated to pupate, or pupated by the end of March, 



