MYIARCHUS. 227 



in length to the wing and almost square at the tip. The tarsus is 

 slightly longer than the exposed culmen, and the hind toe and 

 claw are intermediate in length between the outer and middle toes 

 and claws. Coloration : male and female similar. 



Keij to the Species. 



A. The inner webs of the tail-feathers mar- 



gined with rufous 31. tyrannulus, p. 227. 



B. The inner webs of the tail-feathers not 



margined with rufous. 

 J. Larger; wing more than 85 mm., tail 

 more than 80 mm. 

 h' . Crown of head and back dusky olive- 

 brown M. ferox, p. 22S. 



c . Crown of head and back blackish...... M. fhceonotus, p. 229. 



c. Smaller; wing less than 8o mm., tail 



less than 80 mm J/! nlgrice^s, p. 230. 



499. Myiarchus tyrannulus. 



Rusty-tailed Flycatcher. 



Muscicapa tyrannulus P. L. S. Miiller, Syst. Nat. Suppl. p. 169, 1776 



(Cayenne). 

 Mijiarclius tyrannulus Sclater, Cat. B. Brit. Mus. xiv. p. 251, 18SS ; 

 Brabourne & Chubb, B. S. Amer. i. p. 302, no. 3080, 1912. 



• 



Adult, General colour of the upper surface olive-brown with a 

 greyish tinge, darker and inclining to earth-brown on the head ; 

 median and greater upper wing-coverts and secondary-quills dark 

 brown with pale ash-grey margins to the feathers ; bastard-wing, 

 primary-coverts, and primary-quills also dark brown, the last 

 sliohtly edited with rufous on the outer webs and margined with 

 pale buffi on the inner ones ; upper tail-coverts slightly tinged 

 with rust-brown ; tail dark brqwn, all the feathers, except the two 

 middle ones, broadly margined with rufous on the inner webs ; 

 ear-coverts like the back ; throat and breast pale ash-grey ; 

 abdomen, under tail-coverts, sides of body, axillaries, and under 

 wing-coverts lemon-yellow ; under surface of flight-quills brown 

 with pale inner edges ; lower aspect of tail for the most part 

 rufous, brown on the middle feathers and near the shafts of the 

 lateral ones. 



Total length 173 mm., exjiosed culmen 19, wing 90, tail 81, 

 tarsus 2:5. 



q2 



