THE COt,()RATION PROBLEM. 



147 



Time. — Afternoon. 



Observer. — E. H. Curtis. Time.— Morning. 



Date.— June 10th, 1915. Sex.—? 



Place. — Canford, DQrset. Duration. — 4 hours. 



Food. — Neither bird fed young, nor did cT feed ? , who seemed to be 

 sitting, though on several occasions she put her head out to exchange 

 a few words with the <? , who was feeding on the ground and in trees 

 close at hand, searching carefully. E.H.C. could not see from limited 

 peepholes what he got. 



Observers. — W. P. and E. H. 



Curtis. 

 Date.— June 20th, 1915. 

 Place. — Another nest at Canford, 



Dorset. 

 Food. — Neither parent fed young. 



Observer. — E. H. Curtis. 

 Date.— 25th June, 1916. 

 Place. — Same nest as June 20th. 

 Food. — Unidentified. 



Sex.—? 

 Duration. 



-3i hours. 



Time . — Afternoon , 



Sex. — ■3'. 



Duration. — 1 hour 45 minutes. 



Observer. — E. H. Curtis. 

 Date.— June 27th, 1915. 

 Place. — Same nest as June 20th, 

 Time. — 4.5. Sex. — <? . 



Time.— 5.0. Sex.— 2 . 



Observers. — W. P. and E. H. 



Curtis. 

 Date.— July 3rd, 1915. 

 Place. — Same nest as June 20th. 



Time.— 3.35. 



Sex.- 



Time . — Afternoon . 



Sex. — As below. 



Duration. — 1 hour 35 minutes. 



Food. — Unidentified. 



Food. — Unidentified. 

 Time. — Afternoon. 



Sex. — As below. 

 Duration. — 2^ hours. 



Food. — Unidentified. 



■df 



-Same nest as June 20th. 



Food. — By regurgitation only. 



Time. — Afternoon. 



Sex.— <y . 



Duration. — S^ hours. 



Time.— 4.0, Sex.— 



Observer. — E. H. Curtis. 



Date.— July 4th, 1915. 



Place. - 



Food. — One visit only; by regurgitation. 



On July 10th we tried to resume, but the young had flown. 



[Note. — A most unsatisfactory series of observations. Taking the 

 nest observations alone, 32 hours 45 minutes spent watching only pro- 

 duced 32 visits to the nest, less than one per hour. On no occasion 

 can it be said that the identification of the food was entirely satis- 

 factory. Once we both felt certain it was moths. Once E.H.C. 

 thought it was moths, but his note shows he could not definitely state 

 that this was what it was. Once he recognised a larva. 



The casual observation disclosed feeding on ants on the ground, but 

 this is an exceedingly well known habit. 



On the whole I do not think the evidence can be put higher than 

 this, as far as recognised the food was insect food, and once was 

 Lepidoptera.] 



27. lynx torquilla, L. The Wryneck. 



Observers.— Smith Whiting, E. Time.- — All day, any hour. 



H. and W. P. Curtis. 

 Date. — June, 1916. Sex. — Both parents. 



