366 The Wilson Bulletin — No. 92 



The three larval items total 205 out of the 459 feedings 

 or 44.66% of the counted total; seeds (first three items in 

 the table) were fed 65 times or 14.11% ; unidentified forms 

 120 times or 26.14% ; and a variety of insect forms 15.09%. 

 Computing it in another wa}' ; vegetable food, including the 

 mulberries, was 15.25% ; insect food 58.61% ; and unknown 

 26.14%. Only four potato bugs were fed and few grasshop- 

 pers, although the latter were abundant. 



The grosbeaks confined their foraging to the small timber 

 belt described in the Red-winged Blackbird paper.-'' The Red- 



* The Red-winged Blackbird. Ira N. Gabrielson. Wilson Bulle- 

 tin, June, 1915. 



wing nest was not twenty feet away, but the parents never 

 came into the timber. We had here two birds nesting on the 

 line between two regions of plant growth, iiut each confining 

 themselves to distinct areas. A circle drawn about a point 

 between the two nests would have enclosed an area which 

 would have been almost equally divided between the two 

 species, as a hunting ground. 



The distribution of the food 'to the nestlings was as nearly 

 equal as could be expected, although A, the larger, received 

 a greater part than B. It was a clear case of his overreach- 

 ing B and getting more than his share, but the feedings came 

 so often that B still received sufficient food. The table shows 

 the daily distribution of food to the two nestlings and also 

 the total received by each. Both the male and female took 

 part in the feeding, but the latter was much more active, 283 

 visits out of 382 being credited to her. 



SANITATION. 

 Table III. Disposition of the P^xcreta. 



Date. C. away Dev. C. away Dev. C. away 



June 2G 4 .S 3 3 



June 27 5 9 8 5 



June 28 5 7 8 IG 



June 29 8 1 5 2 13 



June 30 2 7 3 



July 1 2 5 7 7 



Totals 26 m 27 20 53 ."!) 1)2 



Dev. 



Exe. 



8 



11 



17 



22 



8 



24 



3 



IG 



O 



O 



12 



