101 [Vol. xxv. 



28-30. Arctic Terns, alighting on their nests and sitting. 



.31-37. Ditto, alighting and feeding their young. 



38: Common Gull (Larus canus) feeding on ploughed 



land. 

 39 & 40. Ditto, with its young. 

 41-44. Herring-Gull {Larus argentatus) and Le'sser 



Black-backed Gull (L.fuscus) in flight. 

 45 & 46. Shags (Phalacrocorax graculus) sitting on their 



nests and flying. 

 47 & 48. Razorbills (Alca torda) swimming. 

 49. Black Guillemots (Uria grylle) swimming. 



By Mr. W. Bickerton : — 



Mr. Bickerton said that as Recorder of Birds to the 

 Hertfordshire Natural History Society he had commenced 

 several years ago to make a photographic record of the birds 

 nesting in the county, and the slides shown represented a 

 part of the results. They dealt chiefly with some of the less 

 common birds, and all had been taken within the county of 

 Hertfordshire, the majority within 18 miles of London. 



I. Reed-Bunting. (Emberiza schoeniclus.) 



1. Nest placed in coarse herbage and containing four 



per ore 



2. The same nest containing four young birds. 



3. Hen bird at the nest feeding its young. 



4. Ditto, brooding its young. 



5. Cock bird perched on a branch of dead fir fixed just 



over the nest and carrying a large dragon-fly in 

 its bill. 



II. Reed- Warbler. (Acrocephalus streperus.) 



A. Nests placed among the reeds. 



1. Nest placed nearly six feet above the ground, where 



the reeds were very thin. 



2. Nest with four eggs : the exterior of the nest being 



thickly decorated with particles of duck's down. 



