270 Field Museum of Natural History — Zoology, Vol. IX. 



Subfamily POLIOPTlLINiE. Gnatcatchers. 



Size, small; length, less than 4.75; wing, less than 2.50 inches; 

 tarsus, not booted ; wings, longer than tail ; tail, somewhat rounded ; 

 color, bluish ash; about 15 species, all American, of which one oc- 

 curs in eastern North America. 



Gnatcatcher. 



Kinglet. 



Back, bluish gray; outer tail feathers 

 mostly white; wing, less than 2.50. 



Polioptila cccrulea. 

 Blue-gray Gnatcatcher. 



See No. 357. 



Back, olive; no white patch on tail; crown, with patch of bright 

 red (male); crown, olive (female); wing, less than 2.50. 



Regnlns calendula. 

 Ruby-crowned Kinglet. 

 See No. 356. 



Back, olive; no white patch on tail; 

 crown, with patch of orange edged wath yellow 

 and black (male); crown, with yellow patch 

 edged with black (female) ; wing, less than 

 2.50. Regiiliis satrapa. 



Golden-crowned Kinglet. 

 See No. 355. 



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