FAMILY TYRANNID.E 



Keys to the Flycatchers 



Owing to the size of the family, it has been 

 divided into eight groups according to some 

 convenient character or characters, and a 

 key made to each group. A few of the 

 species have characters of more than one of 

 these groups and are therefore included in 

 more than one of the keys. 



I. With very obvious recognition characters, elongated 



tail feathers, distinctive crest or yellow patch on 

 rump. 



a. Middle or outer tail feathers excessively elongated. 



b. Smaller, length about 228 mm. (9.00 in.) ; plumage 

 largely black Copurus leuconotus 



bb. Larger, length about 355 mm. (14.00 in.); back 

 gray ; under parts whitish or white. 



c. Head whitish gray; flanks pink 



Muscivora forficata 



cc. Top and sides of head black; under parts 

 white Muscivora tyrannus 



aa. No elongated tail feathers. 



b. With a conspicuous crest, large, transversely fan- 

 shaped, red or orange tipped with steel blue; 



under parts tawny buff 



Onychorhynchus coronatus cristatus 



bb. No crest, rump pale yellow abruptly contrasting 

 with brownish olive back; abdomen yellow. 



c. Chest tawny 



Myiobius sulphureipygius aureatus 



cc. Chest olive Myiobius a. atricaudus 



II. Under parts bright sulphur or canary yellow; throat 



white (except in Todirostrum cinereum finitimum) . 



a. Small, length not over about 107 mm. (4.25 in.), 

 b. With proportionately large head and long flat bill. 



c. Very minute; whole crown and hindneck black 

 in abrupt contrast to yellowish green back . . 

 Todirostrum nigriceps 



279 



