BIRDS OF NORTH AND MIDDLE AMERICA. 613 



flo. Bill relatively l)road and flat, its depth at base of gonys much less than its width 

 at same point. {Onychoptcnts.) 

 b. Throat and chest pah; gray; larger (males averaging wing more than SO, tail 71 

 or more, exposed culmen mon^ than 16). 

 c. Remiges edged, more or less distinctly, with cinnaiuon-rul'ous, cinnamon, or 

 cinnamon-buffy . ( Myiarchus lawrenceii.) 

 d. Pileum conspicuously darker than back. 



e. Pileum deep sooty brown; slightly larger (male averaging wing 85, tail 

 79.9, exposed culmen 18, tarsus 19.7 ; f(^mal(>, wing 81.8, tail 7(5. 1 , exposed 

 culmen 17.2, tarsus 19.1). (Eastern Mexico to Guatemala.) 



Myiarchus lawrenceii lawrenceii (p. 042) 

 ee. Pileum dark sooty brown to Ijlack; slightly smaller (average measure- 

 ments slightly less than the above). 

 /. Pileum dark sooty brown; back olive or brownish olive; male averaging 

 wing 80.8, tail 74.4, exposed culmen 17.9, tarsus 19.6; female, wing 

 77.1, tail 70, exposed culmen 17.5, tarsus 19.1. (Honduras to western 



and central Costa Rica.) Myiarchus lawrenceii nigricapillus ( p. G44) 



ff. Pileum sooty black to black; back greenish olive; male averaging 

 wing 83.5, tail 79, exposed culmen 16.5, tarsus 19.5; female, 78, tail 

 69.5, exposed culmen 16.5, tarsus 19.5. (Eastern Costa Rica and 



northeastern Panama.) Myiarchus lawrenceii bangsi (p. 646) 



dd. Pileum not conspicuously darker than back. 



e. Outer webs of rectrices more or less rufescent along edges; cinnamomeous 

 edgings to outer webs of remiges more distinct. 

 /. Darker and more olivaceous above. 



g. Larger (male averaging wing 85.1, tail 80.8, exposed culmen 17.9. 

 tarsus 18.6; female, wing 81.1, tail 76.7, exposed culmen 17.3, tarsus 

 18.8). (Central and southwestern Mexico.) 



Myiarchus lawrenceii querulus (p. 647) 



gg. Smaller (male averaging wing 80.7, tail 76.3, exposed culmen 17.7, 



tarsus 19.7; female, wing 75.2, tail 68.3, exposed culmen 16.7, 



tarsus 18.2). (Yucatan, Campeche, and Tabasco, southeastern 



Mexico.) Myiarchus lawrenceii platyrhynchus (p. 648) 



ff. Paler and grayer above (male, wing 78.5, tail 73. exposed culmen 18, 

 tarsus 20.5; female, wing 74, tail 71.8, exposed culmen 17.3, tarsus 

 19.3). (Tres Marias Islands, western Mexico.) 



Myiarchus lawrenceii tresmariae (p. 649) 



ee. Outer webs of rectrices without rufescent edgings; cinnamomeous edgings 



to outer webs of remiges less distinct; male averaging wing 81.3, tail 



76.2, exposed culmen 17.9, tarsus 20.1; female, wing 76.1, tail 71.4, 



exposed culmen 17.1, tarsus 17.9. (Southern Arizona and northwestern 



Mexico.) Myiarchus lawrenceii olivascens (p. 649) 



cc. Remiges without cinnamomeous or rufescent edgings. (Otherwise like M. 

 lairrenceii bangsi but rectrices without rufescent or cinnamomeous edgings on 

 either web.) (Southern Panama to Guiana, Amazon Valley, and ICcuador.) 



Myiarchus nigriceps (p. 650) 

 bb. Throat grayish white; chest pale yellowish gray or grayish yellow; smaller 

 (male averaging wing 73.3, tail 68.2, exposed culmen 16; female, wing 70.8, 

 tail 66.6, exposed culmen 15.8). (Island of Jamaica, Greater Antilles.) 



Myiarchus barbirostris (p. 652) 



MYIARCHUS CRINITUS (Linnaeus). 

 CRESTED FLYCATCHER. 



Adults (sexes alike). — Above plain olive, the pileum usually slio;litly 

 browner, with feathers darker centralh'; mitldle pair of rectrices and 

 outer webs of other rectrices deeper brownish olive with paler olive 



