31 



day, making- comparison impossible for the later period. In 

 the main, the essential points in the two sets of data are in 

 harntony, although the fact that the male was found dead on 

 the ground below the nest after a storm (cause unknown), 

 before all-day observations were begun, prevented any com- 

 parison of the activities of the two sexes. This circumstance, 

 however, gave opportunity to note what adjustment was ef- 

 fected by the widow under the pressure of hunger of the 

 nestlings. She came with food on the sixth day 98 times, and 

 on the seventh day 127 times, as against 66 and 85 for both 

 parents on the corresponding days for the May brood. In both 

 cases the number of young was 3. 



In the June brood the period of most active feeding was from 

 4 to 8 p. m., with a less pronounced maximum in the early 

 morning, as in the May data. On the basis of number ot pieces 

 of food, the results are similar, the morning and evening mor- 

 sels greatly outnumbering those fed at midday. 



The young from each nest were followed after their first 

 flight — which was witnessed in both cases — and their experien- 

 ces on the "first day out" were noted. The struggle for exis- 

 tence became a very real affair to the passive observer, and the 

 records are not without mortality tables. 



Note. — Since this paper was read, two additional broods have 

 been under observation, one of them throughout the entire period 

 from hatching to leaving the nest, with complete data. Results 

 will be published in full in due time. 



