24 MacCaughey, The Hawaiian Elepaio. [j" n 



rumped. The following key is rewritten and modified from the 

 excellent keys of Rothschild and Bryan. 



A. Upper-parts bluish-gray or smoky; 



Kauai only. Kauai Elepaio, 



C. selateri. 



aa. Upper-parts brownish. 



b. White tips of outer-tail-feathers 

 usually longer than .50 inch; 

 white tips and outer edgings of 

 secondaries neither wide nor 

 prolonged; Hawaii only. Hawaii Elepaio, 



C. sandwiehensis. 



bb. White tips of outer-tail feathers 

 usually shorter than .50 inch; 

 white tips and outer edging of 

 secondaries quite pronounced ; 

 Oahu only. Oahu Elepaio, 



C. gayi. 



Key to juvenile birds. — In all three species the wing-coverts of 

 the young birds are spotted with tawny brownish-yellow (white 

 in adults); throat brownish-yellow, without black or white; base 

 of lower mandible light. 



a. Browner above, brownish-yellow of 

 throat and tail-coverts deeper; 

 head not so brownish-yellow; 

 Hawaii only. Hawaii Elepaio, 



C. sandwichensis. 



aa. Lighter, more brownish-yellow above, 

 throat and upper-tail-coverts 

 rusty brownish-yellow. 



b. Occurs on Oahu only. Oahu Elepaio, 



C. gayi. fig. 2. 



bb. Occurs on Kauai only. Kauai Elepaio, 



C. selateri. fig. 3. 



