BIRDS OF NORTH AND MIDDLE AMERICA. 611 



g. Smaller (male averaging wing 89.6, tail 84.7, exposed culmen 17, 

 tarsus 21.3; adult female, wing 86.2, tail 79.7, exposed culmen' 

 17.3, tarsus 20.7). (Southern Mexico to western Costa Rica.) 



Myiarchus nuttingi nuttingi (p. 629) 

 q(j. Larger (male averaging wing 95.9, tail 85.2, exposed culmen 20.2, 

 tarsus 22.6; adult female, wing 94.3, tail 82.3, exposed culmen 20.3, 

 tarsus 22.2). (Southern Mexico to western Costa Rica.) a 



Myiarchus nuttingi brachyurus (p. 630) 



ff. Inner webs of rectrices with a terminal or subterminal space of dusky, 



sometimes extending entirely across or even returning, for a greater 



or less distance, along inner edge; wing relatively longer (averaging 



more than 98 in male, more than 93 in female). {Myiarchus cin- 



erascens.) 



g. Upper parts browner; wing averaging longer (100.9 in male, 95.5 in 



female), bill shorter (exposed culmen 19.1 in male, 18.6 in female). 



(Western United States to Guatemala.) 



Myiarchus cinerascens cinerascens (p. 625) 



(jg. Upper parts grayer; wing averaging shorter (98.3 in male, 93.6 in 



female), bill longer (exposed culmen 19.7 in male, 19 in female). 



(Lower California.) Myiarchus cinerascens pertinax (p. 628) 



dd. Outermost rectrix with less than inner half of inner web cinnamon-rufous 

 (sometimes with none), or else the color much paler than on other rectrices. 

 e. Color of back more olivaceous, the pileum browner; gray of throat deeper 

 (about no. 8 or no. 9); yellow of abdomen deeper (deep primrose); bill 

 relatively shorter and broader (male averaging wing 84.6, tail 82.2, 

 exposed culmen 18.2, tarsus 20.9; female, wing 81.8, tail 80.9, exposed 

 culmen 17.9, tarsus 21.8). (Yucatan.). Myiarchus yucatanensis (p. 632) 

 ee. Color of back grayish brown or grayish, the pileum darker, but not browner, 

 gray of throat paler (nearly grayish white); yellow of abdomen paler 

 (pale primrose to nearly pure white); bill relatively longer and nar- 

 rower. 

 /. Abdomen distinctly yellow (pale primrose). 



g. Outermost rectrix with inner half pale cinnamon-rufous; slightly 

 larger (male averaging: wing 86, tail 78.8, exposed culmen 19.3, 

 tarsus 21.3; female, wing 85, tail 79.5, exposed culmen 18.5, tarsus 

 21). (Island of Haiti, Greater Antilles.) 



Myiarchus dominicensis (p. 634) 



gg. Outermost rectrix with much less than inner half of inner web pale 



cinnamon-rufous; slightly smaller (male averaging wing 84.8, tail 



79.8, exposed culmen 18.5, tarsus 20.9; female, wing 83.7, tad 78.8, 



exposed culmen 18.3, tarsus 21). (Island of Jamaica, Greater 



Antilles.) Myiarchus stolidus (j). 633) 



f. Abdomen white or yellowish white. 



g. Posterior under parts pale primrose yellow or yellowish white; color 



of upper parts paler and grayer (grayish brown or grayish olive) the 



pileum not conspicuously darker; inner webs of rectrices broadly 



edged with cinnamon-rufous. 



h. Smaller, with relatively broader bill; upper parts more olive; male 



averaging wing 83.9, tail 78.3, exposed culmen 19.3, tarsus 20.2; 



female, wing 80.2, tail 75.9, exposed culmen 18.2, tarsus 17.8. 



(Islands of Cuba, including Isle of Pines, and Grand Cayman, 



Greater Antilles.) Myiarchus sagrae sagrae (p. (i'Mi) 



n While the respective ranges of these two forms are apparently identical, it is prol)- 

 al)le that their breeding ranges are separate, one inhabiting the lowlands or coastal 

 plain (Pacific side), the other the interior highlands. 



