58 



GOI.DEN' WARBLERS. 



Gexus. GOLDEX warblers. Cheysocaxtok, 



Size, medium, 5.00 to 5.50 long-. Colors, yellow, streaked 

 witli reddish beneath, and usually with more or less reddish on 

 the head. Feathers of AVings and tail, brownish, margined on in- 

 ner wehs with yellow. Tail, proportionately short, hut its under 

 coverts are more than two-thirds its length. Habits, less arboreal 

 than in the Wood Warblers. 



Members of this genus are mainly confined to tropical 

 and sub-tropical regions of America, where there are a number 

 of species; one species, however, has extended its rang'e near- 

 ly all over Xorth America. 



Fig. 83, 



1, Under side of tail of Yellow Warbler. 2. same of Chestnut-sided. A, upper side, A, 

 Onder, of brain of Yellow AVarbler; B, upper side, B', under, of brain of Chestnut-sided; C, hind 

 brain of Yellow Warbler ( enlarged ). I, cerebrum ; II, crebellum ; III, medulla oblongata ; IV, 

 optic nerve; V, optic lobe; VI, spinal cord, in all. 



In the following comparative diagnosis I have used a Yellow Warbler as a 

 type of the Golden Warblers, and a Chestnut-sided as a typical form of the Wood 

 Warblers in place of the Yellow-rutnp, which is usually regarded as the type. 

 This I have done because the Chestnut-sided, while equally typical of the genus 

 Dendroica, is about the same size as the Yellow Warbler, hence the two species 

 are more easily compared. 



Both individuals of the Yellow and Chestnut-sided Warblers ( I am using 

 specimens preserved in formalin ) are 5.00 long, with the wing 2.50. Bill and 



