50 Chadbourne on New Brunswick Birds. 



The specific and individual variation in color, form, etc., 

 among all animals especially among birds, and caused by 

 climatic conditions, food and surroundings, may be likened 

 to the swaying of the pendulum of a clock Avhich oscillates 

 right and left in a limited space but never passes a certain 

 point. We are inclined to look upon these extreme oscil- 

 lations as incipient species, not considering that they are 

 simple offshoots which have merely received the extreme 

 oscillation and have remained as they are for ages. As 

 proof of this we have only to observe how often characters, 

 which are common to birds in certain sections, appear in 

 widely distant localities. For example Colcqjtes auratus in 

 the Alleghany Mountains often shows red feathers in the 

 black maxillary patch, while Pijoilo erythrophthalmus^ in 

 the same locality, has spotted scapularies."^ 



NOTES ON NEW BRUNSWICK BIRDS. 

 By Arthur P. Chadhourne. 



The following notes may prove of interest in connection 

 with the List of ''New Brunswick Birds" by Montague Cham- 

 berlain (Bull. New Brunswick Nat. Hist. Soc. No 1, 1882). 



From July 4, 1883 to July 16 was spent at Hampton 

 (King's County) and from that date until September 1 at 

 Rothesay (King's County), only about twelve miles distant. 

 Yet there were some marked differences in the birds 

 occurring in the two places. Hampton is just within or 

 rather on the belt of "higher and more constant tempera- 



* See this Journal, Vol. II. (July, I883) p. 33. 



